Neuroscience
Study links speech learning and memory to auditory and somatosensory cortex, not motor cortex
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A study by researchers at McGill University and Yale School of Medicine suggests that learning—and later retaining—new speech patterns depends more on brain areas that process sound and bodily sensation than on the motor cortex regions that control speech movements. The work was published in the Proceedings of the National Academy of Sciences.
New research indicates that oestrogen levels, which vary across the menstrual cycle, can influence how efficiently some drugs reach the brain in women.
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Researchers at Johns Hopkins University have discovered a group of neurons in an ancient brain region that helps filter distractions and maintain focus. Experiments in mice showed that temporarily disabling these cells led to increased distractibility similar to symptoms seen in ADHD.
An international research team has published the first complete map of neural connections spanning the brain and nerve cord of an adult fruit fly. The work reveals that many behaviors arise from distributed local circuits rather than centralized brain control. The connectome was released June 8 in the journal Nature.
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A burst of the neurotransmitter acetylcholine in a key brain region helped mice abandon a previously rewarded choice after an expected reward failed to appear, according to a study that mapped chemical signals in the striatum during reversal learning.
A small 2023 study of adults with obesity in China found that an intermittent energy restriction program was associated with weight loss and changes in gut bacteria alongside altered activity in brain regions linked to appetite, cravings and self-control.
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Researchers at the National University of Singapore’s Yong Loo Lin School of Medicine report that caffeine helped reverse sleep deprivation-related deficits in social recognition memory in laboratory mice, an effect tied to synaptic function in the hippocampal CA2 region. The findings were published in the journal Neuropsychopharmacology.
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