Shoulder Muscle Architecture in the Echidna (Monotremata: Tachyglossus aculeatus) Indicates Conserved Functional Properties
Shoulder Muscle Architecture in the Echidna (Monotremata: Tachyglossus aculeatus) Indicates Conserved Functional Properties
复制标题
针鼹(Monotremata:Tachyglossus aculeatus)的肩部肌肉结构表明了保守的功能特性
DOI:
10.1007/s10914-020-09498-6
复制
发表时间:
2020
影响因子:
1.9
通讯作者:
Pierce, Stephanie E.
中科院分区:
文献类型:
--
作者:
Regnault, Sophie;Fahn-Lai, Philip;Norris, Rachel M.;Pierce, Stephanie E.
Monotremes are a group of egg-laying mammals, possessing a mosaic of ancestral and derived anatomical features. Despite much interest in monotremes from phylogenetic, morphological, and ecological perspectives, they have been the subject of relatively few biomechanical studies. In this study, we examined shoulder and proximal forelimb muscle anatomy and architecture in the short-beaked echidna,Tachyglossus aculeatus, through contrast-enhanced computed tomography and gross dissection. Muscle architecture is a major determinant of muscle function and can indicate specialized muscle roles, such as the capacity for generating large forces (through large physiological cross-sectional area, PCSA) or working ranges (through long fascicle lengths). We hypothesized that some muscles would exhibit architectural specializations convergent with other fossorial and/or sprawling animals, and that other muscles would reflect the echidna’s unusual anatomy and locomotor style. Instead, we found the shoulder and proximal forelimb muscles in echidna to have little variation in their architecture. The muscles generally had long fascicles and small-to-intermediate PCSAs, consistent with force production over a wide working range. Further, muscles did not show overt differences in architecture that, in therian mammals, have been linked to increased forelimb mobility and the transition from sprawling to parasagittal posture. Our measures of architectural disparity placed the echidna closer to the tegu lizard than other sprawling fossorial mammals (e.g., mole). The low architectural diversity found in the echidna’s shoulder and proximal forelimb muscles is interpreted as a lack of functional specialization into distinct roles. We hope our study will contribute to greater understanding of monotreme anatomy and biomechanical function, and to the reconstruction of musculoskeletal evolution in mammals.
登录
查看更多内容
影响因子:
2.4
作者:
Gignac PM;Kley NJ;Clarke JA;Colbert MW;Morhardt AC;Cerio D;Cost IN;Cox PG;Daza JD;Early CM;Echols MS;Henkelman RM;Herdina AN;Holliday CM;Li Z;Mahlow K;Merchant S;Müller J;Orsbon CP;Paluh DJ;Thies ML;Tsai HP;Witmer LM
通讯作者:
Witmer LM
影响因子:
2.9
作者:
A. Martín‐Serra;R. Benson
通讯作者:
R. Benson
影响因子:
1.5
作者:
J. Rose;Mark Sandefur;S. Huskey;Jennifer L. Demler;M. Butcher
通讯作者:
M. Butcher
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
M. Augee;B. Gooden;A. Musser
通讯作者:
A. Musser
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
P. P. Gambaryan;A. Kuznetsov;A. Panyutina;S. Gerasimov
通讯作者:
S. Gerasimov