arrector muscle of hair

(redirected from arrector pili muscles)

arrector muscle of hair

[TA]
bundles of smooth muscle fibers, attached to the deep part of the hair follicles, passing outward alongside the sebaceous glands to the papillary layer of the dermis; they act to pull the hairs erect, causing "goose bumps" or "goose flesh" (cutis anserina) in humans but increasing the depth (efficiency) of the fur or hair of most animals.

ar·rec·tor mus·cle of hair

, arrector pili muscles (ă-rek'tŏr mŭs'ĕl hār, ă-rek'tŏr pī'lī mŭs'ĕlz) [TA]
Bundles of smooth muscle fibers, attached to the deep part of the hair follicles, passing outward alongside the sebaceous glands to the papillary layer of the corium; they act to pull the hairs erect, causing "goose bumps" or "goose flesh" (cutis anserina).
Synonym(s): musculi arrectores pilorum [TA] , erector muscles of hairs.
References in periodicals archive ?
Goosebumps happen when the tiny muscles in each hair follicle, called arrector pili muscles, contract, says Dr.
Each tiny hair on your skin is attached to small muscles, called arrector pili muscles.
Each hair is attached to small muscles called arrector pili muscles.