Neuromuscular Organization of the Superior Longitudinalis Muscle in the Human Tongue

Proper tongue function is essential for respiration and mastication, yet we lack basic information on the anatomical organization underlying human tongue movement

Katrina Slaughter

2006

Scholarcy highlights

  • Proper tongue function is essential for respiration and mastication, yet we lack basic information on the anatomical organization underlying human tongue movement
  • The human superior longitudinalis muscle extends from tongue base to tongue tip and is composed of fiber bundles that range from 2.8 to 15.7 mm in length
  • Multiple motor endplate are present along SL length and dual MEPs are present on some muscle fibers
  • These data demonstrate that the human SL is a muscle of ‘in-series’ design
  • We suggest that SL motor units are organized to innervate specific regions of the tongue body and that activation of SL motor units according to anteroposterior location is one strategy employed by the nervous system to control tongue shape and tongue movement

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