NDLI: Comparative anatomy, homologies and evolution of the pectoral and forelimb musculature of tetrapods with special attention to extant limbed amphibians and reptiles.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Abdala, Virginia Diogo, Rui
Description	Country affiliation: Argentina Author Affiliation: Abdala V ( U.N.T., Instituto de Herpetologia, Fundación Miguel Lillo, CONICET, Tucumán, Argentina. virginia@webmail.unt.edu.ar)
Abstract	The main aim of the present work is to synthesize the information obtained from our dissections of the pectoral and forelimb muscles of representative members of the major extant taxa of limbed amphibians and reptiles and from our review of the literature, in order to provide an account of the comparative anatomy, homologies and evolution of these muscles in the Tetrapoda. The pectoral and forelimb musculature of all these major taxa conform to a general pattern that seems to have been acquired very early in the evolutionary history of tetrapods. Although some muscles are missing in certain taxa, and a clear departure from this general pattern is obviously present in derived groups such as birds, the same overall configuration is easily distinguishable in these taxa. Among the most notable anatomical differences between the groups, one that seems to have relevant evolutionary and functional implications, concerns the distal insertion points of the forearm musculature. In tetrapods, the muscles of the radial and ulnar complexes of the forearm are pleisomorphically mainly inserted onto the radius/ulna or onto the more proximal carpal bones, but in mammals some of these muscles insert more distally onto bones such as the metacarpals. Interestingly, a similar trend towards a more distal insertion of these muscles is also found in some non-mammalian tetrapod taxa, such as some anurans (e.g. Phyllomedusa). This may be correlated with the acquisition of more subtle digital movement abilities in these latter taxa.
File Format	HTM / HTML
ISSN	14697580
e-ISSN	14697580
DOI	10.1111/j.1469-7580.2010.01278.x
Journal	Journal of Anatomy
Issue Number	5
Volume Number	217
Language	English
Publisher	Wiley
Publisher Date	2010-11-01
Publisher Place	Great Britain (UK)
Access Restriction	Open
Subject Keyword	Discipline Anatomy Forelimb Anatomy & Histology Muscle, Skeletal Vertebrates Amphibians Anatomy, Comparative Animals Reptiles Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Anatomy Cell Biology Developmental Biology Histology Molecular Biology Ecology, Evolution, Behavior and Systematics

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