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A team of researchers at Howard Hughes Medical Institute has learned more about the brain processes involved in short-term memory retention when distractions occur. In their paper published in the journal Nature Neuroscience, the group describes memory experiments they conducted with lab mice and what they learned from them.

Over the past several decades, scientists have learned more about the parts of the brain that are involved in locomotor activities. As one example, they have found that the anterior lateral motor cortex (ALM) plays a major role when the brain is engaged in planning an activity. In this new effort, the researchers wondered what sorts of things go on in the brain when it is engaged in planning a short-term assignment, for instance, the order of tasks at work, but is interrupted by some other event. How would an event like an interrupting phone call impact their ability to remember the plan for doing their tasks?

To find out, the researchers applied optogenetic activation of vibrissal of the somatosensory cortex in test mice—they shone a light on the part of the mouse brain responsible for processing information from their whiskers. But first, the mice were trained to lick on the right side of an object if they felt the stimulus and on the left side of the object if they did not. They then had the mice engage in a planning type of activity that involved reacting to what they sensed with their whiskers.

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