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Sleep

·March 31, 2025·5 min read

Less Deep Sleep Linked to Brain Shrinkage, Alzheimer’s Risk

New research shows that reduced time in slow wave and REM sleep is associated with smaller brain volumes in regions vulnerable to Alzheimer’s disease. Using sleep studies and brain imaging data from 270 participants, researchers found that poor sleep architecture was linked to brain atrophy over time—particularly in the inferior parietal region, an area affected early in Alzheimer’s.

Featured Neuroscience

·March 25, 2025·6 min read

How Sleep Rewrites the Brain to Strengthen and Optimize Memories

A new study reveals how the brain reprocesses and refines memories during sleep, particularly those related to spatial learning. Researchers tracked rats’ hippocampal neuron activity for up to 20 hours and found that memory patterns first echoed the learning phase and then gradually shifted to match the recollection phase upon waking.

Featured Neuroscience Open Neuroscience Articles

·March 21, 2025·4 min read

Sleep-Deprived Fruit Flies Show Sharper Memory via PKA Signaling

Fruit flies with genetic mutations that severely reduce sleep show enhanced performance in olfactory memory tasks, challenging assumptions about sleep’s role in cognition. This paradox appears to be driven by increased protein kinase A (PKA) signaling in the mushroom body, a brain region responsible for memory and sleep regulation.

Featured Neurology Neuroscience

·March 20, 2025·3 min read

Changes in Sleep Patterns Could Predict Dementia Risk

A new study finds that women in their 80s who develop increasing daytime sleepiness over five years are twice as likely to develop dementia. Researchers tracked 733 women without cognitive impairment, using wrist devices to monitor sleep and circadian rhythms.

This shows two people awake at night on their phones.

Featured Neuroscience Psychology

·March 19, 2025·3 min read

Higher Depression Risks for Night Owls

A new study finds that staying up late, known as having an “evening chronotype,” is associated with a higher risk of depression. Researchers analyzed data from 546 university students and found that this link is influenced by sleep quality, alcohol consumption, and mindfulness levels.

Featured Neuroscience

·March 11, 2025·4 min read

Poor Sleep Linked to Brain’s Waste-Removal Breakdown

A new study reveals that poor sleep in older adults disrupts the brain’s glymphatic system, responsible for clearing harmful waste and toxins. Researchers found that compromised sleep quality leads to dysfunction in this crucial system, potentially increasing risks for memory decline and cognitive impairments.

Featured Neuroscience

·March 5, 2025·5 min read

Sleeping With Eyes Open: How Pupil Size Reveals Brain Activity

A new study reveals that pupil size fluctuates constantly during sleep, reflecting changes in brain activation levels. Researchers developed a novel method to keep test subjects' eyes open, allowing them to monitor these dynamics without disrupting sleep.

Featured Neurology Neuroscience

·March 3, 2025·6 min read

Sleep Brain Waves Linked to Consciousness in Coma

A new study finds that sleep spindles—bursts of brain activity during sleep—may predict recovery in unresponsive patients with recent brain injuries. Researchers analyzed EEG recordings of 226 comatose patients and found that those with sleep spindles were significantly more likely to regain consciousness and functional independence.

This shows a man, immune cells and a bed.

Featured Neuroscience

·February 24, 2025·5 min read

Poor Sleep Alters Immune Cells, Increasing Risk for Inflammatory Diseases

A new study reveals that even a single night of sleep deprivation can alter immune cell profiles to resemble those seen in obesity, a condition linked to chronic inflammation. Researchers found that sleep-deprived individuals had increased levels of non-classical monocytes, immune cells associated with inflammatory responses, similar to patterns observed in obese participants.

This shows a person floating in a dream.

Featured Neuroscience Psychology

·February 19, 2025·5 min read

Why Some People Remember Dreams and Others Don’t

A new study explores why some people vividly recall dreams while others forget them. Researchers found that dream recall is influenced by personality traits, sleep patterns, and even seasonal changes. People who frequently daydream and have a positive attitude toward dreams were more likely to remember them.

Featured Neuroscience

·February 6, 2025·5 min read

Sleep Strengthens Emotionally Charged Memories During Non-REM Phase

Researchers have discovered that positive emotions enhance perceptual memories during sleep, particularly in the non-REM stage. Using mice, they found that memories linked to rewarding experiences lasted longer than neutral ones.

Featured Neurology Neuroscience

·January 27, 2025·5 min read

REM Sleep Delays May Indicate Early Alzheimer’s

Delayed rapid eye movement (REM) sleep may be an early indicator of Alzheimer’s disease. Researchers found that participants with delayed REM sleep had higher levels of toxic proteins associated with Alzheimer’s and reduced levels of brain-derived neurotrophic factor (BDNF), which supports memory.

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Sleep

Less Deep Sleep Linked to Brain Shrinkage, Alzheimer’s Risk

How Sleep Rewrites the Brain to Strengthen and Optimize Memories

Sleep-Deprived Fruit Flies Show Sharper Memory via PKA Signaling

Changes in Sleep Patterns Could Predict Dementia Risk

Higher Depression Risks for Night Owls

Poor Sleep Linked to Brain’s Waste-Removal Breakdown

Sleeping With Eyes Open: How Pupil Size Reveals Brain Activity

Sleep Brain Waves Linked to Consciousness in Coma

Poor Sleep Alters Immune Cells, Increasing Risk for Inflammatory Diseases

Why Some People Remember Dreams and Others Don’t

Sleep Strengthens Emotionally Charged Memories During Non-REM Phase

REM Sleep Delays May Indicate Early Alzheimer’s

Sensory Remix: The Neurological World of Synaesthesia

Ultra-Processed Foods Erodes Visual Attention

Why Feeling Good is Harder than Not Feeling Bad

Astrocytes Identified as Key Target for Treating Fragile X Syndrome

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