Motor unit

Definition

A motor unit consists of a single motor neuron and all the muscle fibers it innervates. It is the smallest functional unit in the nervous system control of muscle tension, crucial for producing movement by contracting muscles.

Related terms

Motor Neuron: A type of nerve cell that transmits signals from the brain or spinal cord to a muscle or gland, initiating movement or action.

Muscle Fiber: A single muscle cell, specialized for contraction, which works in groups within muscles to facilitate bodily movements.

Neuromuscular Junction: The synapse or connection between a motor neuron and a muscle fiber, through which nerve impulses are transmitted to trigger muscle contractions