The Irish at War (@irelandbattles) posted at 2:40 pm on Fri, Nov 15, 2024:
#OnThisDay 1881 Willie Pearse was born in Dublin. An artist & a teacher Willie fought in the GPO during the Easter Rising. Though only a Captain & had no hand in planning the Rising, Willie was singled out for execution for being Patrick Pearse’s brother.
A Russian spy ship has been escorted out of the Irish Sea after it entered Irish-controlled waters and patrolled an area containing critical energy and internet submarine pipelines and cables.
It was spotted on Thursday east of Dublin and south-west of the Isle of Man but Norwegian, US, French and British navy and air defence services initially observed it accompanying a Russian warship, the Admiral Golovko, through the English channel last weekend.
The Irish navy ship the LÉ James Joyce escorted it out of the Irish exclusive economic zone (EEZ) at about 3am on Friday with the air corps continuing to monitor its movements as it headed south.
Its presence has raised fresh concerns about the security of the interconnector cables that run between Ireland and the UK carrying global internet traffic from huge datacentres operated by tech companies including Google and Microsoft, which have their EU headquarters sited in Ireland.
The sighting of the Russian intelligence ship came as British defence forces monitored other Russian vessels near its eastern coastal waters. On Thursday, British jets were also scrambled to monitor a Russian reconnaissance aircraft flying close to UK airspace, the Ministry of Defence said.
The ship was also spotted on Monday and Tuesday west of Cork, where there are another set of connectors between Ireland and France, some offering transatlantic interconnection.
At one point it was positioned just inside the Irish EEZ, 5-7km (3.1 to 4.3 miles) north of the cables connecting Ireland and the UK.
Edward Burke, an assistant professor in the history of war at University College Dublin, told the Examiner the situation was alarming.
“Once again we see the Russian navy probing the defences of western Europe. It’s yet another wake-up call – one that we shouldn’t need – that Ireland needs to bolster its naval capabilities and deepen its maritime security partnerships in Europe,” he said.
It is understood defence forces in Ireland observed the ship operating three drones over Irish waters, raising fears it was conducting surveillance.
Concerns over critical infrastructure around Europe have been raised on multiple occasions this year after the alleged sabotage of the Baltic gas pipeline and undersea internet cables between Finland and Estonia. In August, China admitted that a Hong Kong-flagged ship damaged the pipeline but said it was accidental.
The Yantar is officially classed as an auxiliary general oceanographic research vessel with underwater rescue capabilities. It is tasked by an arm of the Russian defence ministry and is separate from its navy.
It can deploy deep-diving submersibles and has been seen operating close to seabed infrastructure on a number of occasions by open source intelligence analysts, according to Navy Lookout intelligence analysts. The analysts said the ship’s mission was “probably more about strategic signalling and intelligence gathering” than sabotage.
Irish and British defence forces have worked together since the vessels entered waters off the coast of the UK with a significant multinational operation put in place.
The Yantar was travelling with Golovko and a tanker, Vyazma, and both vessels were monitored throughout their journey in the English channel by RFA Tideforce and HMS Iron Duke.
They then handed over surveillance to the French as it headed out of the English channel with the British navy also shadowing another Russian vessel heading north towards the Baltics.
When the Yantar broke away from the Golovko and headed north into the Irish sea, it was shadowed by HMS Cattistock, with the operation becoming public when the ship activated its automatic identification for about four minutes on Thursday when it was south of the Isle of Man.
According to reports, it switched off its transponders transmitting its position after entering the Irish EEZ but the Irish vessel continued to shadow it.
They tried to make contact with the ship but Russian personnel did not respond and at about 3am on Friday it left the waters and headed south.
In 2017, Maryland’s Department of Health found funding for a program to send caseworkers to the homes of asthmatic children to help get their disease under control, but they had a problem: finding the kids.
Targeting infectious diseases like influenza or lead exposure would have been easier: State laws required reporting those illnesses to public health officials. But asthma is a chronic disease that health care providers weren’t required to report. How could caseworkers find the children they wanted to help?
Clifford S. Mitchell, director of the office that led the program, first looked to Medicaid claims data since the asthma program was intended for low-income kids. But that data was only reported every six months, and then it had to go to a vendor to be analyzed—which meant as much as a year may have passed between a child’s visit to the hospital and the first outreach by a caseworker. By then, contact information for the families often no longer worked. If their children hadn’t just had an asthmatic crisis, parents often saw no need for a caseworker to visit their home. “We [had] a conundrum, because we have this service,” Mitchell remembers, “but we can’t really efficiently get to the people who are most likely to receive the service favorably and ask for it.”
He found a solution in a system that wasn’t created for public health at all: a health information exchange, initially set up in the mid-2000s to organize and share patients’ electronic health records between their health care providers. Maryland’s health information exchange, known as CRISP, received hospitalization reports every night. It could identify Mitchell’s target patients in real time.
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It took some effort to work out technical and privacy issues to integrate CRISP’s data into systems used by the state health department and county-level case workers, and the program slowed dramatically during the COVID-19 pandemic. But on September 8, 2022, information about children eligible for the asthma program began moving automatically from the CRISP database to the county caseworkers who could reach out to families. Caseworkers were suddenly enrolling about 25 percent of children the system flagged for the program—a success rate roughly ten times higher than when they were working with Medicaid claims records.
“I am one lucky guy,” Mitchell says. He has the real-time ability to track an illness and deploy an intervention that most public health workers only dream about. He is also working in a state that has taken steps to make it especially easy to adapt a health information exchange (HIE) built primarily for health care providers so that it serves a public health function.
Maryland is one of 43 states that rely on HIEs for at least one public health function, according to a 2022 study published by the Civitas Networks for Health, a national collaborative of organizations working on HIEs. Providers, payers, and public health officials are gradually recognizing the whole health system, public and private, can benefit if they share tools with one another.
For many years, there have been two entirely separate conversations about data modernization in health care—one among public health agencies used to working with disease registries based on reporting requirements imposed on health care providers, and a parallel conversation among doctors, hospitals, and health plans working to streamline patient care. There’s a growing recognition, especially after the pandemic, that both communities are wrestling with the same question, and there are many ways they could work together—to make practitioners’ lives easier and to improve the nation’s health.
Using CRISP for poor kids with asthma would have seemed far-fetched when it began taking shape in about a decade earlier, because it was originally created to shuffle the medical paperwork of seniors. The data-sharing initiative spawned from the frustrations of John C. Erickson, the founder and then-chairman of a chain of elder care facilities called Erickson Senior Living. He didn’t like that when nursing home residents went to the hospital, the hospital’s doctors “would know nothing about them,” recalls David Horrocks, then Erickson’s chief information officer, “and then they come back, and our docs would know nothing about what happened in the hospital.”
Most information-driven industries were then rapidly adopting technology, like email, that’s now commonplace; medicine was still in the Stone Age, with practitioners relying on paper records and fax machines. Erickson thought there had to be a better way. In 2006, he enlisted Maryland’s three largest hospital systems to launch pilot programs to digitally share seniors’ medical records, and he put up $5 million of his own money to get it off the ground.Horrocks, as Erickson’s tech chief, was tasked with building the platform. Over several years, CRISP was developed.
It coalesced as lawmakers were trying to drag the health care industry toward the latest innovations of the information age. A major shot in the arm came as part of the economic stimulus package signed by President Barack Obama in 2009, which included the Health Information Technology for Economic and Clinical Health Act (HI TECH for short).The legislation codified a position in the Department of Health and Human Services (HHS) to coordinate health technology efforts and appropriated $35 billion over ten years to encourage the adoption of electronic health records—and HIEs to share records between providers.
None of these efforts paid much attention to public health; policymakers were focused on making providers more efficient, bringing down the cost of care, and improving patient outcomes. The federal government did not specify what form the HIEs should take, so they evolved in many different ways. Some were for-profit companies, some were independent nonprofits, and some sat inside state or county agencies. Some covered entire states while others were organized at a regional level or only included a subset of providers. Some were more focused on networking hospitals; others were more focused on serving health insurance companies. Collaborations between different stakeholders were often uncomfortable, because they required competing providers to share data with one another, as well as greater transparency between providers and insurers.In some states, privacy laws had to be modified to facilitate information exchange. And in some parts of the country, these challenges were so insurmountable that they are still not served by an HIE.
Maryland was fertile ground for building an especially robust HIE. The state already had a unique payment model in which an independent commission appointed by the governor sets payment rates for hospitals.The administration of then-Governor Martin O’Malley helped get all the state’s hospitals on board with CRISP, in 2009, and provided funding to keep it going.Maryland made a major change to its payment system in 2014 that allowed hospitals to keep more revenue by keeping patients healthier and using fewer services. That in turn meant hospitals needed better data tools to track their patients, and CRISP was ready to fill this need.
CRISP gave every hospital and provider a tracking dashboard and even real-time alerts when a patient went to the ER or was admitted to the hospital.Over time, these tools expanded to gather data from medical and mental health case managers. “If there’s somebody who can get help so they’re not admitted every week to the hospital, going from ER to ER, finding out who that person is and helping them becomes a really good thing for the health care system,” says Joshua Sharfstein, a medical doctor and professor at Johns Hopkins Bloomberg School of Public Health, who was Maryland’s health secretary as this system was being created in 2014.
For public health workers, CRISP can map hospitalizations for conditions like asthma to identify hot spots with much more precision than previous tools—and with actionable information.CRISP also runs the prescription drug monitoring platform for the state Department of Health. Its role is so central to Maryland’s health system that it is recognized as what’s known as a Health Data Utility, bedrock infrastructure that provides health information to many players in the state’s health care and public health ecosystem.
HIEs like CRISP, if widely deployed, could radically improve the practice of public health in the US, says Craig Behm, CRISP’s CEO. For instance, heat maps are a mainstay of public health. But they identify very broad geographic hotspots, which Behm says often doesn’t tell public health workers very much they don’t already know. “The [bigger] problem is, ‘What are the compounding factors and health related social needs and different outcomes? And where do people get care? Those details are available!… We need to go deeper now and we can.”
That level of information is available with CRISP. But “public health has been so undervalued and underfunded for so long,” Behm says, “Public health [officials are] having trouble even understanding what modern infrastructure could do for them.”
The COVID pandemic made painfully clear the high cost of underinvestment in public health data infrastructure. Federal budget allocations also show what a low priority such resources have been for policymakers. In 2009, for example, Congress appropriated $35 billion to advance data tools for providers and insurers. But it didn’t earmark money for CDC data modernization until 2019 and has only appropriated a total of $1.35 billion for the effort over the last four years.
The COVID pandemic made clear just how useful CRISP could be for public health, Behm says.Very early in the pandemic, CRISP was processing massive amounts of data every night, tracking case reports, hospitalizations, and deaths. Lab workers were sending incomplete demographic data to local Departments of Health, but CRISP could match the health department registries with its own data set, tracking in real time essential data like the race and ethnicity of infected Marylanders. When public health workers needed phone numbers to do contact tracing, Behm recalls, “I was like, ‘Well, great! I have all the phone numbers in the world!”
In the scramble to respond to COVID, other states’ public health workers also turned to HIEs as partners—often in ways they never had before. HIEs were glad to help, but those relationships became strained as the crisis passed, says Jolie Ritzo, Civitas’s vice president for strategy. “The challenges feel bigger than they were,” Ritzo says.
HHS is now steering the next evolution in the health information ecosystem, laying out standards and certifications for national information exchanges that will allow records to follow a patient from one HIE to another. At the same time, the CDC is leading its own Data Modernization Initiative and has signed contracts for hundreds of millions of dollars with Palantir to build a data system of its own.
A major open question is how these two efforts will interact. Many HIE leaders hope that existing data exchange infrastructure can link the information networks many providers already use regularly with upgraded data systems for public health officials. Erica Galvez, CEO of Manifest Medex, California’s largest HIE, and a former official in the health technology office at HHS, says she believes many public health departments will look to existing HIEs as an “on ramp” to the nationwide network.
Claudia Williams, who was Manifest Medex’s founding director, says HIEs have already done a lot of work to manage the complicated relationships between stakeholders at the local, regional, and state levels. It would be in everybody’s interest, she thinks, for the CDC to try to engage with the HIE infrastructure that exists rather than trying to develop an entirely separate information system.
“The better place to start is to strengthen and incentivize what goes on at the state level,” says Williams, who also served as senior advisor of health innovation and technology in the Obama administration and is now the chief social impact officer of UC Berkeley’s School of Public Health.
But fewer than half the states have HIEs ready to take on full public health functions at this point, says Horrocks, who left CRISP in 2022 to build a state-wide HIE in New York. (Horrocks also coauthored the nationwide study of HIEs published by Civitas in 2022.) Still, he believes they’re the best structure for public health to rely on in the long term.
“HIEs do something that’s very unique: We hold fully identified data in trust, and that lets us put datasets together,” Horrocks said. “I don’t know who else can do that. We’re not going to trust the … the state government, and you’re certainly not going to trust CDC to hold everybody’s fully identified data. And, I don’t think you’re going to trust Google to do it, either, or Palantir. I think that’s a role that these HIEs can uniquely fill.”
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<p class=”has-drop-cap”>In 2017, Maryland’s Department of Health found funding for a program to send caseworkers to the homes of asthmatic children to help get their disease under control, but they had a problem: finding the kids.</p>
<p>Targeting infectious diseases like influenza or lead exposure would have been easier: State laws required reporting those illnesses to public health officials. But asthma is a chronic disease that health care providers weren’t required to report. How could caseworkers find the children they wanted to help?</p>
<p>Clifford S. Mitchell, director of the office that led the program, first looked to Medicaid claims data since the asthma program was intended for low-income kids. But that data was only reported every six months, and then it had to go to a vendor to be analyzed—which meant as much as a year may have passed between a child’s visit to the hospital and the first outreach by a caseworker. By then, contact information for the families often no longer worked. If their children hadn’t just had an asthmatic crisis, parents often saw no need for a caseworker to visit their home. “We [had] a conundrum, because we have this service,” Mitchell remembers, “but we can’t really efficiently get to the people who are most likely to receive the service favorably and ask for it.”</p>
<p>He found a solution in a system that wasn’t created for public health at all: a health information exchange, initially set up in the mid-2000s to organize and share patients’ electronic health records between their health care providers. Maryland’s health information exchange, known as CRISP, received hospitalization reports every night. It could identify Mitchell’s target patients in real time.</p>
<p>It took some effort to work out technical and privacy issues to integrate CRISP’s data into systems used by the state health department and county-level case workers, and the program slowed dramatically during the COVID-19 pandemic. But on September 8, 2022, information about children eligible for the asthma program began moving automatically from the CRISP database to the county caseworkers who could reach out to families. Caseworkers were suddenly enrolling about 25 percent of children the system flagged for the program—a success rate roughly ten times higher than when they were working with Medicaid claims records.</p>
<p>“I am one lucky guy,” Mitchell says. He has the real-time ability to track an illness and deploy an intervention that most public health workers only dream about. He is also working in a state that has taken steps to make it especially easy to adapt a health information exchange (HIE) built primarily for health care providers so that it serves a public health function.</p>
<p>Maryland is one of 43 states that rely on HIEs for at least one public health function, according to a 2022 study published by the Civitas Networks for Health, a national collaborative of organizations working on HIEs. Providers, payers, and public health officials are gradually recognizing the whole health system, public and private, can benefit if they share tools with one another.</p>
<p>For many years, there have been two entirely separate conversations about data modernization in health care—one among public health agencies used to working with disease registries based on reporting requirements imposed on health care providers, and a parallel conversation among doctors, hospitals, and health plans working to streamline patient care. There’s a growing recognition, especially after the pandemic, that both communities are wrestling with the same question, and there are many ways they could work together—to make practitioners’ lives easier and to improve the nation’s health.</p>
<p class=”has-drop-cap”>Using CRISP for poor kids with asthma would have seemed far-fetched when it began taking shape in about a decade earlier, because it was originally created to shuffle the medical paperwork of seniors. The data-sharing initiative spawned from the frustrations of John C. Erickson, the founder and then-chairman of a chain of elder care facilities called Erickson Senior Living. He didn’t like that when nursing home residents went to the hospital, the hospital’s doctors “would know nothing about them,” recalls David Horrocks, then Erickson’s chief information officer, “and then they come back, and our docs would know nothing about what happened in the hospital.”</p>
<p>Most information-driven industries were then rapidly adopting technology, like email, that’s now commonplace; medicine was still in the Stone Age, with practitioners relying on paper records and fax machines. Erickson thought there had to be a better way. In 2006, he enlisted Maryland’s three largest hospital systems to launch pilot programs to digitally share seniors’ medical records, and he put up $5 million of his own money to get it off the ground. Horrocks, as Erickson’s tech chief, was tasked with building the platform. Over several years, CRISP was developed.</p>
<p>It coalesced as lawmakers were trying to drag the health care industry toward the latest innovations of the information age. A major shot in the arm came as part of the economic stimulus package signed by President Barack Obama in 2009, which included the Health Information Technology for Economic and Clinical Health Act (HI TECH for short). The legislation codified a position in the Department of Health and Human Services (HHS) to coordinate health technology efforts and appropriated $35 billion over ten years to encourage the adoption of electronic health records—and HIEs to share records between providers.</p>
<p>None of these efforts paid much attention to public health; policymakers were focused on making providers more efficient, bringing down the cost of care, and improving patient outcomes. The federal government did not specify what form the HIEs should take, so they evolved in many different ways. Some were for-profit companies, some were independent nonprofits, and some sat inside state or county agencies. Some covered entire states while others were organized at a regional level or only included a subset of providers. Some were more focused on networking hospitals; others were more focused on serving health insurance companies. Collaborations between different stakeholders were often uncomfortable, because they required competing providers to share data with one another, as well as greater transparency between providers and insurers. In some states, privacy laws had to be modified to facilitate information exchange. And in some parts of the country, these challenges were so insurmountable that they are still not served by an HIE.</p>
<p>Maryland was fertile ground for building an especially robust HIE. The state already had a unique payment model in which an independent commission appointed by the governor sets payment rates for hospitals. The administration of then-Governor Martin O’Malley helped get all the state’s hospitals on board with CRISP, in 2009, and provided funding to keep it going. Maryland made a major change to its payment system in 2014 that allowed hospitals to keep more revenue by keeping patients healthier and using fewer services. That in turn meant hospitals needed better data tools to track their patients, and CRISP was ready to fill this need.</p>
<p>CRISP gave every hospital and provider a tracking dashboard and even real-time alerts when a patient went to the ER or was admitted to the hospital. Over time, these tools expanded to gather data from medical and mental health case managers. “If there’s somebody who can get help so they’re not admitted every week to the hospital, going from ER to ER, finding out who that person is and helping them becomes a really good thing for the health care system,” says Joshua Sharfstein, a medical doctor and professor at Johns Hopkins Bloomberg School of Public Health, who was Maryland’s health secretary as this system was being created in 2014.</p>
<p>For public health workers, CRISP can map hospitalizations for conditions like asthma to identify hot spots with much more precision than previous tools—and with actionable information. CRISP also runs the prescription drug monitoring platform for the state Department of Health. Its role is so central to Maryland’s health system that it is recognized as what’s known as a Health Data Utility, bedrock infrastructure that provides health information to many players in the state’s health care and public health ecosystem.</p>
<p>HIEs like CRISP, if widely deployed, could radically improve the practice of public health in the US, says Craig Behm, CRISP’s CEO. For instance, heat maps are a mainstay of public health. But they identify very broad geographic hotspots, which Behm says often doesn’t tell public health workers very much they don’t already know. “The [bigger] problem is, ‘What are the compounding factors and health related social needs and different outcomes? And where do people get care? Those details are available!… We need to go deeper now and we can.”</p>
<p>That level of information is available with CRISP. But “public health has been so undervalued and underfunded for so long,” Behm says, “Public health [officials are] having trouble even understanding what modern infrastructure could do for them.”</p>
<p class=”has-drop-cap”>The COVID pandemic made painfully clear the high cost of underinvestment in public health data infrastructure. Federal budget allocations also show what a low priority such resources have been for policymakers. In 2009, for example, Congress appropriated $35 billion to advance data tools for providers and insurers. But it didn’t earmark money for CDC data modernization until 2019 and has only appropriated a total of $1.35 billion for the effort over the last four years.</p>
<p>The COVID pandemic made clear just how useful CRISP could be for public health, Behm says. Very early in the pandemic, CRISP was processing massive amounts of data every night, tracking case reports, hospitalizations, and deaths. Lab workers were sending incomplete demographic data to local Departments of Health, but CRISP could match the health department registries with its own data set, tracking in real time essential data like the race and ethnicity of infected Marylanders. When public health workers needed phone numbers to do contact tracing, Behm recalls, “I was like, ‘Well, great! I have all the phone numbers in the world!”</p>
<p>In the scramble to respond to COVID, other states’ public health workers also turned to HIEs as partners—often in ways they never had before. HIEs were glad to help, but those relationships became strained as the crisis passed, says Jolie Ritzo, Civitas’s vice president for strategy. “The challenges feel bigger than they were,” Ritzo says.</p>
<p>HHS is now steering the next evolution in the health information ecosystem, laying out standards and certifications for national information exchanges that will allow records to follow a patient from one HIE to another. At the same time, the CDC is leading its own Data Modernization Initiative and has signed contracts for hundreds of millions of dollars with Palantir to build a data system of its own.</p>
<p>A major open question is how these two efforts will interact. Many HIE leaders hope that existing data exchange infrastructure can link the information networks many providers already use regularly with upgraded data systems for public health officials. Erica Galvez, CEO of Manifest Medex, California’s largest HIE, and a former official in the health technology office at HHS, says she believes many public health departments will look to existing HIEs as an “on ramp” to the nationwide network.</p>
<p><a href=”https://harvardpublichealth.org/policy-practice/what-does-a-chief-social-impact-officer-in-public-health-do/” target=”_blank” rel=”noreferrer noopener”>Claudia Williams</a>, who was Manifest Medex’s founding director, says HIEs have already done a lot of work to manage the complicated relationships between stakeholders at the local, regional, and state levels. It would be in everybody’s interest, she thinks, for the CDC to try to engage with the HIE infrastructure that exists rather than trying to develop an entirely separate information system.</p>
<p>“The better place to start is to strengthen and incentivize what goes on at the state level,” says Williams, who also served as senior advisor of health innovation and technology in the Obama administration and is now the chief social impact officer of UC Berkeley’s School of Public Health.</p>
<p>But fewer than half the states have HIEs ready to take on full public health functions at this point, says Horrocks, who left CRISP in 2022 to build a state-wide HIE in New York. (Horrocks also coauthored the nationwide study of HIEs published by Civitas in 2022.) Still, he believes they’re the best structure for public health to rely on in the long term.</p>
<p class=” t-has-endmark t-has-endmark”>“HIEs do something that’s very unique: We hold fully identified data in trust, and that lets us put datasets together,” Horrocks said. “I don’t know who else can do that. We’re not going to trust the … the state government, and you’re certainly not going to trust CDC to hold everybody’s fully identified data. And, I don’t think you’re going to trust Google to do it, either, or Palantir. I think that’s a role that these HIEs can uniquely fill.”</p>
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Adolescents exhibit high decision noise, often choosing suboptimal options, but this tendency decreases with age and correlates with improvements in goal-directed behaviors and adaptability. A study analyzing participants aged 12 to 42 found that decision noise levels were consistent across tasks and mediated age-related increases in sophisticated choice-making. This suggests that the reduction of noise with age contributes to enhanced decision strategies like planning and flexibility. Adolescents’ reliance on less efficient decision strategies may result from limited cognitive resources, as their brain areas related to cognitive control are still developing. Emotional, motivational, and social influences further impact their decision-making processes. These findings provide insight into the computational mechanisms behind decision-making and open pathways for understanding neurodevelopmental disorders and real-world applications.
Summary: Researchers have identified two neural circuits in the retrosplenial cortex (RSC) that are critical for spatial navigation and memory storage. The M2-projecting pathway links spatial thought to action, while the AD-projecting pathway supports location-specific memory.
Using advanced mapping techniques, the team found that inhibiting these circuits impaired object-location memory and spatial actions. These findings provide a foundation for understanding how neurodegenerative disorders like Alzheimer’s disease affect specific brain regions and could lead to more targeted treatments.
Key Facts:
Two RSC pathways were identified: M2-projecting (action) and AD-projecting (memory).
Blocking M2 neurons impaired spatial actions, while AD neurons affected memory recall.
Insights into RSC circuits may guide treatments for Alzheimer’s and cognitive disorders.
Researchers led by the University of California, Irvine are the first to reveal how two neural circuits located in the brain’s retrosplenial cortex are directly linked to spatial navigation and memory storage.
This discovery could lead to more precise medical treatments for Alzheimer’s disease and other cognitive disorders by allowing them to target pathway-specific neural circuits.
The study, recently published online in the journal Molecular Psychiatry, identified two types of RSC pathways, connected to different parts of the brain, each with its own pattern of inputs and functions.
“By demonstrating how specific circuits in the RSC contribute to different aspects of cognition, our findings provide an anatomical foundation for future studies and offer new insights into how we learn and remember the space around us,” said lead and co-corresponding author Xiangmin Xu, UC Irvine Chancellor’s Professor of anatomy and neurobiology and director of the campus’s Center for Neural Circuit Mapping.
“This is an important step in understanding how conditions like Alzheimer’s disease and other neurodegenerative disorders affect particular regions of the brain, which will help to inform new approaches and treatments.”
The RSC is linked to multiple regions of the brain. The team focused on two main pathways, the M2-projecting, which is connected to the secondary motor cortex, and the AD-projecting, which is connected to the anterior thalamus.
M2 neurons are involved in turning spatial thought into action, while the AD neurons are vital to remembering specific locations.
To observe these circuits in action, researchers used advanced viral tools to map and manipulate the connections separately and evaluate the effects.
They found that blocking M2-projecting neurons made it more difficult to remember where objects were located and to associate specific places with actions. Inhibiting AD-projecting neurons only diminished memory of objects’ location.
“We are expanding on these results to explore additional pathways within the RSC, examining how different types of neurons impact memory and spatial orientation,” Xu said.
“Our goal is to build a map of the brain’s ‘GPS system.’ This will not only increase our knowledge of how we navigate our world and form memories of it, but also help identify specific brain cells and their pathways contributing to various disorders such as Alzheimer’s disease and develop treatments that target them.”
Other team members were Xiaoxiao Lin, Ali Ghafuri, Xiaojun Chen and Musab Kazmi, all current or former members of Xu’s lab; and co-corresponding author Douglas A. Nitz, professor and chair of cognitive science at UC San Diego.
Funding: This work was supported by the National Institutes of Health under grants NS078434, MH120020 and U01AG076791.
About this neuroscience research news
Author: Patricia Harriman Source:UC Irvine Contact: Patricia Harriman – UC Irvine Image: The image is credited to Neuroscience News
Neuroscience News (@NeuroscienceNew) posted at 7:31 pm on Fri, Nov 15, 2024:
How Stressful Events Alter Memories
Stress can disrupt memory precision, leading to generalized aversive memories that trigger fear in unrelated, safe situations—a hallmark of PTSD.
Researchers found that stress increases the release of endocannabinoids, which enlarges memory…
How Stressful Events Alter Memories
Stress can disrupt memory precision, leading to generalized aversive memories that trigger fear in unrelated, safe situations—a hallmark of PTSD. Researchers found that stress increases the release of endocannabinoids, which enlarges memory engrams in the brain by disrupting interneurons responsible for maintaining engram specificity. These larger engrams cause generalized fearful memories, impairing the ability to distinguish between threatening and safe environments. By blocking endocannabinoid receptors on specific interneurons, researchers were able to restore memory specificity and limit the spread of fearful responses. This breakthrough sheds light on the biological mechanisms of stress-induced memory generalization and offers a promising pathway for PTSD treatment. Future research will explore links between memory engrams, stress, and age to further refine therapeutic approaches.
Dr. Eli David (@DrEliDavid) posted at 5:35 am on Fri, Nov 15, 2024:
Future history books will include this photo of @JMilei and @realDonaldTrump and refer to it as the moment the Western civilization started fighting back against wokeism and Marxism and saved itself from total ruin