Life shrouds most choices in mystery. Some people inch toward a comfortable enough spot and stick close to that rewarding status quo. Out to dinner, they order the usual. Others consider their options systematically or randomly. But many choose to grapple with the uncertainty head on. “Explorers” order the special because they aren’t sure they’ll like it. It’s a strategy of maximizing rewards by discovering whether as yet unexplored options might yield better returns. In a new study, Brown University researchers show that such explorers use a specific part of their brain to calculate the relative uncertainty of their choices, while non-explorers do not.
Memory
Stress pathway identified as potential therapeutic target to prevent vision loss
A new study identifies specific cell-stress signaling pathways that link injury of the optic nerve with irreversible vision loss. The research, published by Cell Press in the February 9 issue of the journal Neuron, may lead to new strategies that will help to protect vulnerable neurons in the retina after optic nerve damage and diseases.
Neuroscientists link brain-wave pattern to energy consumption
Different brain states produce different waves of electrical activity, with the alert brain, relaxed brain and sleeping brain producing easily distinguishable electroencephalogram (EEG) patterns. These patterns change even more dramatically when the brain goes into certain deeply quiescent states during general anesthesia or a coma.
Mild cognitive impairment is associated with disability and neuropsychiatric symptoms
In low- and middle-income countries, mild cognitive impairmentan intermediate state between normal signs of cognitive aging, such as becoming increasingly forgetful, and dementia, which may or may not progressis consistently associated with higher disability and with neuropsychiatric symptoms but not with most socio-demographic factors, according to a large study published in this week’s PLoS Medicine.
Researchers increase understanding of gene’s potentially protective role in Parkinson’s
Treatments for Parkinson’s disease, estimated to affect 1 million Americans, have yet to prove effective in slowing the progression of the debilitating disease.