Organization of the motor centres for the innervation of different muscles of the tongue: A neuromorphological study in the frog

C. Matesz, I. Schmidt, L. Szabo, A. Birinyi, G. Székely

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16 Citations (Scopus)


Cobalt labelling studies on the localization and morphology of the frog's hypoglossal nucleus have revealed three subnuclei. The dorsomedial subnucleus innervates the geniohyoid, hyoglossus, genioglossus and the intrinsic tongue muscles. The ventrolateral subnucleus supplies the sternohyoid, geniohyoid, omohyoid and intrinsic tongue muscles. The intermediate subnucleus innervates the omohyoid, geniohyoid and intrinsic tongue muscles. Neurons innervating protractor, retractor and intrinsic tongue muscles differ in their soma surface area and in their dendritic arborization pattern. It is concluded that there exists a musculotopic organization in the frog's hypoglossal nucleus and that motoneurons subserving different function in tongue movements disclose characteristic morphological differences.

Original languageEnglish
Pages (from-to)190-194
Number of pages5
JournalEuropean Journal of Morphology
Issue number2-3
Publication statusPublished - Jun 5 1999



  • Dendritic arborization
  • Frogs
  • Hypoglossal nucleus
  • Musculotopic organization

ASJC Scopus subject areas

  • Anatomy
  • Agricultural and Biological Sciences (miscellaneous)

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