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Morphological analysis of tendinous structure in the American alligator jaw muscles

✍ Scribed by Dr. Kazuyuki Shimada; I. Sato; H. Ezure

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
939 KB
Volume
217
Category
Article
ISSN
0362-2525

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✦ Synopsis

Abstract

In the American alligator, the jaw muscles show seven bundles of tendinous structure: cranial adductor tendon, mandibular adductor tendon, lamina anterior inferior, trap‐shaped lamina lateralis, lamina intramandibularis, lamina posterior, and depressor mandibular tendon (originating from the musculus depressor mandibulae, m. pseudotemporalis, m. adductor mandibulae posterior, m. adductor mandibulae externus, m. intramandibularis, m. pterygoideus anterior, and m. pterygoideus posterior). These tendinous structures are composed of many collagen fibrils and elastic fibers; however, the distributions and sizes of the fibers in these tendinous components differ in comparison with those of other masticatory muscles. The differences of these properties reflect the kinetic forces or the stretch applied to each tendon by the muscle during jaw movements in spite of the simple tendon‐muscle junctions. Β© 1993 Wiley‐Liss, Inc.

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