Extraordinary grip strength and specialized myology in the hyper-derived hand of Perodicticus potto?
PCSA
arboreality
forearm
functional morphology
muscle architecture
Journal
Journal of anatomy
ISSN: 1469-7580
Titre abrégé: J Anat
Pays: England
ID NLM: 0137162
Informations de publication
Date de publication:
11 2019
11 2019
Historique:
accepted:
03
06
2019
pubmed:
17
7
2019
medline:
18
9
2020
entrez:
17
7
2019
Statut:
ppublish
Résumé
Previous behavioral reports of the African lorisid, Perodicticus potto, have speculated that these animals have an extraordinary grip strength. This ability is hypothesized to be facilitated by a range of anatomical features within the forelimb, ranging from the presence of a retia mirabilia in its wrist to the hyper-abduction of its pollex. Despite numerous behavioral reports, however, this claim of extraordinary grip strength has not been empirically substantiated. This study quantifies the physiological cross-sectional area of the digital flexor muscles within P. potto. These data are compared with a broad primate sample, including several similarly sized strepsirrhines. Contrary to expectation, we found that P. potto actually has relatively below-average digital flexor PCSA. However, we identified other myological characteristics in the upper limb of P. potto that were unexpected, including the largest brachioradialis muscle (an elbow flexor) among our primate sample, and - despite P. potto having only a vestigial second digit - an independent digital extensor indicis that is absent in almost a quarter of our primate sample.
Identifiants
pubmed: 31309575
doi: 10.1111/joa.13051
pmc: PMC6794210
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Langues
eng
Sous-ensembles de citation
IM
Pagination
931-939Subventions
Organisme : National Science Foundation
ID : BCS-14-40599
Pays : International
Organisme : National Science Foundation
ID : IOS-15-57125
Pays : International
Informations de copyright
© 2019 Anatomical Society.
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