All articles tagged with #locus coeruleus
Researchers tracked 63 adults as they predicted colors on a screen while their pupil size and brain activity were recorded. They found that surprise-triggered pupil dilation aligns with arousal signals in the locus coeruleus/norepinephrine system and EEG markers, helping the brain refresh context, adjust learning, and reduce perceptual bias when predictions are violated.
A NIH-funded study found autoantibodies that target the nervous system are present in some Long COVID patients and may be linked to neurological symptoms; experiments transferring these antibodies to mice reproduced pain sensitivity, balance issues, and fatigue, suggesting autoimmunity could underlie a subset of Long COVID symptoms and might guide targeted therapies, though more research is needed to map specific antibodies and confirm causality.
UC Berkeley researchers mapped brain circuits that regulate growth hormone release during sleep and discovered a feedback loop with the locus coeruleus that balances sleep and wakefulness, linking deep sleep to metabolism and cognition and offering new targets for treating sleep-related metabolic and neurodegenerative conditions.
Emerging research suggests stimulating the vagus nerve may help preserve the locus coeruleus, a brainstem hub that regulates norepinephrine and memory, potentially slowing Alzheimer's- and age-related memory loss. Vagus nerve stimulation is already approved for epilepsy, migraine, and depression and may boost brain norepinephrine to support cognitive function. Early studies show memory benefits in mild cognitive impairment and even in healthy adults after brief stimulation, but results are preliminary and more research is needed.
Scientists discovered that the locus coeruleus in the brain acts as a 'reset button' for memories, helping to separate experiences into distinct events by signaling important changes and promoting memory segmentation, with implications for understanding memory formation and potential treatments for stress-related disorders.
Scientists discovered that a small brain region called the locus coeruleus acts as a 'reset button' during meaningful changes in experiences, helping to organize memories by signaling the start of new events and separating them into distinct memories. This process is crucial for understanding how we perceive and remember events, and disruptions in this system may relate to memory disorders like PTSD and Alzheimer's disease.
A study in Alzheimer’s & Dementia reveals that reduced connectivity between the locus coeruleus and the medial temporal lobe is an early indicator of brain atrophy and cognitive decline in Alzheimer’s disease. Lower connectivity during a novelty task was linked to faster atrophy in regions typically affected by Alzheimer’s, especially in individuals with higher amyloid beta levels. This suggests that enhancing this connectivity could slow disease progression. The study highlights the need for further research on diverse populations and the potential of non-invasive brain stimulation as a therapeutic strategy.
A study by the Max Planck Institute of Psychiatry found that depressed individuals show reduced pupillary response to rewards, indicating lower activation in the locus coeruleus, a key brain structure. This finding suggests that pupillometry could aid in developing personalized treatment strategies for depression, including the selection and dosing of antidepressants. Understanding the physiological mechanisms behind depression is crucial for improving treatment outcomes, especially for the 30% of patients unresponsive to current medications.
The locus coeruleus, a small brain nucleus responsible for managing noradrenaline, has been found to play a crucial role in regulating REM sleep and its impact on cognitive processes such as memory and emotions. Advanced MRI studies have revealed a correlation between locus coeruleus activity during wakefulness and REM sleep quality, particularly in individuals aged 50-70. These findings could provide insights into sleep disorders and their connection to conditions like Alzheimer's disease.
Researchers have identified and mapped glucose-sensitive cell populations in the brain, including the locus coeruleus, a region known for its role in arousal, attention, and stress response. This achievement may lead to more targeted treatments for diabetes. The discovery of these cell populations and their exact locations in the brain could potentially lead to more targeted treatments for conditions like diabetes.