dermatome


dermatome
dermatomic /derr'meuh tom"ik/, dermatomal, adj.
/derr"meuh tohm'/, n.
1. Anat. an area of skin that is supplied with the nerve fibers of a single, posterior, spinal root.
2. Surg. a mechanical instrument for cutting thin sections of skin for grafting.
3. Embryol. the part of a mesodermal somite contributing to the development of the dermis.
[1925-30; DERMA1 + -TOME]

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      the outer portion of an embryo from which the skin and subcutaneous tissues (tissue) are developed and, postnatally, the areas of skin supplied by the branches of a single dorsal root ganglion (a dense group of nerve-cell bodies). In the developing embryo the dermatome arises from one of the three segments (somites (somite)) of the mesoderm, the middle layer of embryonic tissue.

      Dermatomes are arranged with considerable regularity in the vertebrate trunk, although there is some overlap with similar areas above and below. Because each dermatomic area of skin is innervated by branches of nerves originating from a single dorsal root ganglion, the loss of sensation in an area of skin can be traced to a specific spinal nerve, facilitating the diagnosis of spinal cord injuries and certain neurological diseases.

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Universalium. 2010.

Look at other dictionaries:

  • Dermatome — may refer to: Dermatome (instrument), a surgical instrument used to produce thin slices of skin Dermatome (anatomy), an area of skin that is supplied by a single pair of dorsal roots Dermatome (embryology) Cutis plate, the dorsal portion of the… …   Wikipedia

  • dermatome — ● dermatome nom masculin Territoire cutané en forme de bande, innervé par une racine nerveuse. Instrument chirurgical tranchant utilisé pour prélever des lamelles de peau destinées à être greffées …   Encyclopédie Universelle

  • dermatome — [dʉr′mə tōm΄] n. [ DERMA1 + TOME] any of the segmentally arranged mesodermal masses in a vertebrate embryo, destined to form dermis …   English World dictionary

  • Dermatome — Dermatomes Le dermatome est une aire de la peau à laquelle ne contribue qu une racine dorsale. Il dérive du dermomyotome qui dérive lui même des somites. En médecine, le dermatome permet de déterminer les zones de lésion de la moelle épinière.… …   Wikipédia en Français

  • Dermatome — (1) A localized area of skin that is has its sensation via a single nerve from a single nerve root of the spinal cord. Shingles (herpes zoster) typically affects one or several isolated dermatomes. (2) A dermatome is also a cutting instrument… …   Medical dictionary

  • dermatome — noun Etymology: International Scientific Vocabulary dermat + ome Date: 1910 the lateral wall of a somite from which the dermis is produced • dermatomal adjective …   New Collegiate Dictionary

  • dermatome — noun a) an instrument used surgically to remove a thin slice of skin for grafting b) an area of skin which is innervated by afferent nerve fibers coming to a single posterior spinal root …   Wiktionary

  • dermatome — n. scalpel used to cut thin layers of skin (Surgical) …   English contemporary dictionary

  • dermatome — der·ma·tome …   English syllables

  • dermatome — n. 1) a surgical instrument used for cutting thin slices of skin in some skin grafting operations. 2) that part of the segmented mesoderm in the early embryo that forms the deeper layers of the skin (dermis) and associated tissues. See: somite …   The new mediacal dictionary


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