arrector muscle of hair


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Related to arrector muscle of hair: Arrector pili muscle, Arrectores pilorum

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.