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gray matter

any area of neural tissue that is dominated by cell bodies and is devoid of myelin, such as the cerebral cortex and the H-shaped periaqueductal gray of the spinal cord. Compare white matter.

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Psychology term of the day

May 30th 2024

recurrent collateral inhibition

recurrent collateral inhibition

a negative-feedback system that prevents rapid, repeated firing of the same motor neuron. To accomplish this, one branch of an axon loops back toward the cell body of the neuron and communicates with an inhibitory Renshaw cell. The Renshaw cell in turn inhibits the neuron.