Biomechanics of the skull and the beak in Ramphastos (Ramphastidae, Aves) I. Description of anatomical elements

The different cranial kinetic systems described in Birds are limited in Ramphastos by the dorsal and backward position of the nostrils, the shape of the fronto-nasal suture, the lateral fit-in between nasal, lacrymal and frontal bones, and the divergent directions of the 2 otic processes of the quad...

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Bibliographic Details
Published inGegenbaurs morphologisches Jahrbuch Vol. 130; no. 1; p. 125
Main Authors Höfling, E, Gasc, J P
Format Journal Article
LanguageFrench
Published Germany 1984
Subjects
Animals
Beak - anatomy & histology
Beak - physiology
Biomechanical Phenomena
Birds - physiology
Skull - anatomy & histology
Skull - physiology
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Summary:The different cranial kinetic systems described in Birds are limited in Ramphastos by the dorsal and backward position of the nostrils, the shape of the fronto-nasal suture, the lateral fit-in between nasal, lacrymal and frontal bones, and the divergent directions of the 2 otic processes of the quadrate, 5 ligaments joint the posterior skull elements to the quadrate and the mandible. Small sesamoid bones strengthen the external jugo-mandibular ligament in its retro-articular portion. The nomenclature of the aponeuroses is not useful by itself to compare the organizations and homology of the diverses muscular layers in the different birds groups. The differences observed in the relative position of the muscular bundles have to be related to the shape and particular relationships between skeletal structures. We have to consider the osteo-muscular systems as a whole and analyse them from a functional viewpoint.
ISSN:0016-5840