Weekly Neuroscience Update

Electrode locations from all patients aligned to a common brain atlas and color-coded by region. The “preSMA” and “dACC” together comprise the medial frontal cortex in our study. Credit: Courellis et al.

Scientists carried out a study aimed at better understanding how neurons preserve context over time as the goals of an ongoing task change. Their findings, published in Nature Human Behaviour, suggest that the brain can represent the same information through different patterns of neuronal activity that vary in stability and flexibility.

New research found that an unhealthy Western-style diet accelerates cognitive decline in individuals genetically predisposed to Alzheimer’s disease.

A scientific team has shown that a new brain-computer interface (BCI) can allow people with vocal tract and bodily paralysis to convey both speech and upper-body gestures simultaneously. While BCIs have facilitated one or the other in the past, this new system is the first to enable both modes of communication at once, more closely replicating natural expression.

In a study analysing nearly 3,000 brain MRI exams, researchers found that living in highly disadvantaged neighbourhoods was associated with adverse brain health.

Neuroscientists have found that a centralized genetic switch in the neuron’s cell body, rather than just local cues at the axon tips, directs axon navigation. By analysing over 12,000 developing neurons, they created a genetic atlas that could lead to new therapies for repairing damaged neural pathways after strokes or spinal cord injuries.

New research suggests that losing muscle as we age may indicate a higher risk of dementia, with individuals suffering from sarcopenia—characterized by muscle loss and decreased strength—facing a 42% increased risk.

Researchers have discovered that spontaneous eye-blink rate serves as a simple, noninvasive marker for tracking the development of executive function in early childhood. The study revealed that children aged 3–6 with higher blink rates performed better on cognitive flexibility tasks, an association specifically linked to focused activation within the right dorsolateral prefrontal cortex.

Scientists at the University of Galway have taken part in a first-in-human study of stroke patients using a thin wire fitted with sensors to assess and map their clots.

A new study reveals the human brain is composed of two independently evolved organs, enabling the first lab-grown human hindbrain neurons. Published in Nature Neuroscience, the research shows that what we call the human brain is actually two ancient, independent nervous systems assembled side by side over hundreds of millions of years of evolutionary history.

A clinical trial has found that exercise has a significant effect on mood and lab-based measures of new brain cell formation in healthy middle-aged participants.

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