This refers to small skin ridges like those found on the surface of the palms of the hands and the soles of the feet; in humans, they are ridges about 0.5 mm wide. Small pores (sweat pores) through which sweat escape are open at roughly regular intervals on the surface of the cutaneous ridges. Sweat keeps the cutaneous ridges moderately flexible, enhancing the sensitivity of the tactile receptors inside the skin and providing a non-slip effect on the skin surface. For this reason, skin with cutaneous ridges (ridge skin) is sometimes called tactile skin (or sensory skin) or friction skin. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
ヒトの手のひらや足の裏の表面にあるような皮膚小稜をいい,ヒトでは幅0.5mm程度の隆線である。皮膚隆線の表面にはほぼ一定の間隔をおいて汗の出る小孔(汗口)が開いている。皮膚隆線は汗によって適度な柔軟性を保ち,皮膚内部にある触覚受容器の感受効果を高めるとともに,皮膚表面にすべりどめの効果をも与えている。皮膚隆線のある皮膚(隆線皮膚)はそのために,触覚皮膚(あるいは感覚皮膚)とか,摩擦皮膚と呼ばれることがある。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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