myotome

myotome
1. A knife for dividing muscle. 2. In embryos, that part of the somite that develops into skeletal muscle. SYN: muscle plate. 3. All muscles derived from one somite and innervated by one segmental spinal nerve. 4. In primitive vertebrates, the muscular part of a metamere. SYN: myomere. [myo- + G. tomos, a cut]

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myo·tome 'mī-ə-.tōm n
1) the portion of an embryonic somite from which skeletal musculature is produced called also muscle plate
2) an instrument for myotomy
myo·to·mal .mī-ə-'tō-məl adj

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n.
that part of the segmented mesoderm in the early embryo that gives rise to all the skeletal muscle of the body. Visceral (smooth) muscles develop from unsegmented mesoderm (see mesenchyme). See also somite.

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myo·tome (miґo-tōm) [myo- + -tome] 1. an instrument for performing myotomy. 2. the muscle plate or portion of a somite that develops into noncardiac striated muscle; called also myomere. 3. a group of muscles innervated from a single spinal segment.

Medical dictionary. 2011.

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  • Myotome — Scheme showing the manner in which each vertebral centrum is developed from portions of two adjacent segments. (Myotome labeled in upper right.) …   Wikipedia

  • Myotome — My o*tome, n. [See {Myotomy}.] (Anat.) (a) A muscular segment; one of the zones into which the muscles of the trunk, especially in fishes, are divided; a myocomma. (b) One of the embryonic muscular segments arising from the protovertebr[ae]; also …   The Collaborative International Dictionary of English

  • myotome — [mī′ō tōm΄] n. 〚 MYO + TOME〛 1. the body wall musculature in a single segment of primitive chordates and segmented invertebrates 2. one of the paired mesodermal masses in a vertebrate embryo from which the musculature develops * * * my·o·tome… …   Universalium

  • Myotome —   [griechisch tome̅ »das Schneiden«, »Schnitt«], Singular Myotom das, s, im Verlauf der Keimesentwicklung aus den dorsalen Anteilen der Ursegmente (Somiten) zu beiden Seiten der Chorda dorsalis entstehende segmentale Mesodermbildungen, aus denen… …   Universal-Lexikon

  • myotome — [mī′ō tōm΄] n. [ MYO + TOME] 1. the body wall musculature in a single segment of primitive chordates and segmented invertebrates 2. one of the paired mesodermal masses in a vertebrate embryo from which the musculature develops …   English World dictionary

  • myotome — myomère [mjɔmɛʀ] n. m. ou myotome [mjɔtom] n. m. ÉTYM. Déb. XXe, myomère, Nouveau Larousse illustré; myotome, 1904, in Rev. gén. des sc., no 16, p. 795 (antérieur au sens d « instrument tranchant », 1855, Nysten Littré); de myo , et mère, tome. ❖ …   Encyclopédie Universelle

  • myotome — (mi o to m ) s. m. Terme de chirurgie. Myotome sous conjonctival, couteau destiné à inciser un muscle sous la conjonctive. ÉTYMOLOGIE    Myo..., et verbe grec signifiant couper …   Dictionnaire de la Langue Française d'Émile Littré

  • myotome — noun Etymology: International Scientific Vocabulary Date: 1894 the portion of an embryonic somite from which skeletal musculature is produced …   New Collegiate Dictionary

  • myotome — one of the embryonic or adult lateral muscle segments of the body …   Dictionary of ichthyology

  • myotome — n. [Gr. mys, muscle; tome, to cut] A muscle segment, somite or myomere …   Dictionary of invertebrate zoology

  • myotome — noun In vertebrate embryonic development, a group of tissues formed from somites that develop into the body wall muscle …   Wiktionary

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