arrector pili

(redirected from Arrectores pilorum)
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arrector pili

(ă-rek′tŏr pī′lī″, pil′ē) (ar″ek′tōr′ēz pī″lōr′ŭm, pil-ōr′) plural.arrectores pilorum [L. arrector, raiser + pilus]
One of the involuntary muscle fibers arising in the skin and extending down to connect with the hair follicles on the side toward which the hair slopes. After certain stimuli, including cold or fright, the muscle fibers contract, straighten the follicles, and raise the hairs, resulting in piloerection.
References in periodicals archive ?
Vimentin-immunoreactivity was very dense in the smooth muscle cells of blood vessels, it was positively stained in the arrectores pilorum muscles (Fig.
Madam, Piloleiomyomas are benign smooth muscle tumours arising from the arrectores pilorum muscles in the skin, and they are rare dermal tumours.1 They usually present as small, reddish-brown or skin-coloured, firm, often painful papules or as nodules on the trunk and the extremities.
Arrectores pilorum muscle (Figure 5 & 6) was prominent.
1) Multiple piloleiomyomas-both arising from arrectores pilorum muscle
Structure and evolutionary implications of the musculi arrectores pilorum in Chiroptera.