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Thursday, June 25, 2015

Brain Research: Rare neurons enable mental flexibility ♦ Low-grade brain tumor diagnosis redefined ♦ Atlas of older brains could help diagnosis of Alzheimer's disease

Norepinephrine aids brain in sorting complex auditory signals The neuromodulator norepinephrine has an unexpected, direct action on auditory processing of complex signals, specifically bird songs in the zebra finch.
Rare neurons enable mental flexibility Behavioral flexibility -- the ability to change strategy when the rules change -- is controlled by specific neurons in the brain. Researchers report that they have identified the neurons responsible for our ability to adapt to a changing environment.
Low-grade brain tumor diagnosis redefined A group of patients have made important contributions to an American cancer study that proposes a change in how some brain tumors are classified and ultimately treated. The study reveals that a tumor's DNA is key to determining if a lower-grade malignant brain tumor may rapidly progress to glioblastoma.
How our brains can form first impressions quickly A study of how people can quickly spot animals by sight is helping uncover the workings of the human brain. One of the first parts of the brain to process visual information -- the primary visual cortex -- can control this fast response, rather than more complex parts of the brain being required
Atlas of older brains could help diagnosis of Alzheimer's disease A digital map of the aging brain could aid the diagnosis of Alzheimer's disease and other neurodegenerative disorders in older people, a study suggests. The atlas created using images from MRI scans of older people could aid diagnosis by comparing the patient's' scans with a detailed map of the healthy aging brain

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