node of Ranvier

any of successive regularly spaced gaps in the myelin sheath surrounding an axon. The gaps permit the exchange of ions across the plasma membrane at those points, allowing the nerve impulse to leap from one node to the next in so-called saltatory conduction along the axon. [Louis A. Ranvier (1835–1922), French pathologist]

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Psychology term of the day

May 9th 2024

motor test

any test designed to measure motor skills, ranging from gross motor to fine motor manipulation.