intrafusal fiber

a small muscle fiber, 2 to 12 of which are located within each muscle spindle. Intrafusal fibers are sensitive to stretching and muscle tension and are connected to the stretch receptors. Compare extrafusal fiber.

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Psychology term of the day

January 15th 2025

chemotherapy

n. the use of chemical agents to treat diseases, particularly cancer, in which case it is contrasted with radiation therapy. —chemotherapeutic adj. —chemotherapist n.