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neuromuscular junction

the junction between a motor neuron and the muscle fiber it innervates. In skeletal muscle, the muscle-cell plasma membrane (sarcolemma) is greatly folded in the region opposite the terminus of a motor axon, forming a motor end plate. When impulses arrive at the axon terminus, a neurotransmitter diffuses across the gap separating the axon and motor end plate. The neurotransmitter binds to receptors in the sarcolemma and causes an end-plate potential, which can trigger muscle contraction. Also called myoneural junction; neuromuscular synapse.

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Psychology term of the day

January 29th 2025

range fractionation

range fractionation

a hypothesis of perception of stimulus intensity, stating that a wide range of intensity values can be encoded by a group of cells, each of which is a specialist for a particular range of stimulus intensities.