Ecological correlates of three-dimensional muscle architecture within the dietarily diverse Strepsirrhini.

Autor: Dickinson E; Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA.; Department of Anatomy, College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, New York, USA., Manzo M; Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA., Davis CE; Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA., Kolli S; Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA.; Department of Biological Sciences, University of Denver, Denver, Colorado, USA., Schwenk A; Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA.; College of Public Health, Thomacharles Jefferson University, Philadelphia, Pennsylvania, USA., Carter A; Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA., Liu C; Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA., Vasipalli N; Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA., Ratkiewicz A; Department of Anatomy, College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, New York, USA., Deutsch AR; Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA., Granatosky MC; Department of Anatomy, College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, New York, USA.; Center for Biomedical Innovation, College of Osteopathic Medicine, New York Institute of Technology, Old Westbury, New York, USA., Hartstone-Rose A; Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA.
Jazyk: angličtina
Zdroj: Anatomical record (Hoboken, N.J. : 2007) [Anat Rec (Hoboken)] 2024 Jun; Vol. 307 (6), pp. 1975-1994. Date of Electronic Publication: 2023 Dec 08.
DOI: 10.1002/ar.25361
Abstrakt: Analysis of muscle architecture, traditionally conducted via gross dissection, has been used to evaluate adaptive relationships between anatomical form and behavioral function. However, gross dissection cannot preserve three-dimensional relationships between myological structures for analysis. To analyze such data, we employ diffusible, iodine-based contrast-enhanced computed tomography (DiceCT) to explore the relationships between feeding ecology and masticatory muscle microanatomy in eight dietarily diverse strepsirrhines: allowing, for the first time, preservation of three-dimensional fascicle orientation and tortuosity across a functional comparative sample. We find that fascicle properties derived from these digital analyses generally agree with those measured from gross-dissected conspecifics. Physiological cross-sectional area was greatest in species with mechanically challenging diets. Frugivorous taxa and the wood-gouging species all exhibit long jaw adductor fascicles, while more folivorous species show the shortest relative jaw adductor fascicle lengths. Fascicle orientation in the parasagittal plane also seems to have a clear dietary association: most folivorous taxa have masseter and temporalis muscle vectors that intersect acutely while these vectors intersect obliquely in more frugivorous species. Finally, we observed notably greater magnitudes of fascicle tortuosity, as well as greater interspecific variation in tortuosity, within the jaw adductor musculature than in the jaw abductors. While the use of a single specimen per species precludes analysis of intraspecific variation, our data highlight the diversity of microanatomical variation that exists within the strepsirrhine feeding system and suggest that muscle architectural configurations are evolutionarily labile in response to dietary ecology-an observation to be explored across larger samples in the future.
(© 2023 The Authors. The Anatomical Record published by Wiley Periodicals LLC on behalf of American Association for Anatomy.)
Databáze: MEDLINE
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