arrector pili muscle

arrector pi·li muscle -'pī-.lī-, -'pil-ē- n one of the small fan-shaped smooth muscles associated with the base of each hair that contract when the body surface is chilled and erect the hairs, compress an oil gland above each muscle, and produce the appearance of goose bumps called also erector pili muscle, pilomotor muscle

Medical dictionary. 2011.

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  • Arrector pili — A microscopic band of muscle tissue which connects a hair follicle to the dermis. When stimulated, the arrector pili will contract and cause the hair to become more perpendicular to the skin surface (stand on end). * * * pl. arrectoґres piloґrum… …   Medical dictionary

  • erector pili muscle — erector pi·li muscle pī .lī , pil ē n ARRECTOR PILI MUSCLE called also erector pili …   Medical dictionary

  • musculus arrector pili — [TA] arrector pili muscle: a type of tiny smooth muscle of the skin whose contraction causes the hair to stand erect with cutis anserina (goose flesh). origin, papillary layer of dermis; insertion, a hair follicle; innervation, sympathetic;… …   Medical dictionary

  • arrector muscle of hair — arrector pili muscle musculus arrector pili …   Medical dictionary

  • pili — Plural of pilus. [L.] * * * pili pl of PILUS pili see ARRECTOR PILI MUSCLE, ERECTOR PILI MUSCLE * * * (fimbriae) pl. n. (sing …   Medical dictionary

  • Muscle — is the tissue of the body which primarily functions as a source of power. There are three types of muscle in the body. Muscle which is responsible for moving extremities and external areas of the body is called "skeletal muscle." Heart… …   Medical dictionary

  • Muscle — For other uses of Muscle , see Muscle (disambiguation). A top down view of skeletal muscle Muscle (from Latin …   Wikipedia

  • Muscle horripilateur — Les muscles horripilateurs sont des muscles lisses situés à la base de chaque poil chez la plupart des mammifères (dont les humains). Ils participent à la thermorégulation, grâce au réflexe de chair de poule. Leur nom latin est arrector pili… …   Wikipédia en Français

  • folliculus pili — [TA] hair follicle: one of the tubular invaginations of the epidermis that enclose the hairs, and from which they grow. It is divided into upper and lower segments: the upper comprises the follicular infundibulum (extending from the free surface… …   Medical dictionary

  • pilomotor muscle — n ARRECTOR PILI MUSCLE …   Medical dictionary


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