Compartive Study of Physiological Cross-Sectional Area of Masticatory Muscles among Species of Carnivora

Ito, Kai; Endo, Hideki

doi:10.3106/041.041.0403

Cited by 6 publications

(11 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Over more than a century, there have been a plethora of studies investigating the structure of skeletal muscle and the functional correlates of fascicular arrangement (e.g., Weber, ; Morris, 1948; Gans & Bock, ; Gordon et al, , ; Gans, ; Powell et al, ; Lieber & Friden, ; Lieber & Ward, ). Extensive research has also been made into quantifying inter‐ and intra‐ specific variation in muscle architectural properties within a wide variety of mammalian and non‐mammalian taxa (e.g., Sacks & Roy, 1982; Roy et al, a,b; Anapol & Jungers, 1986; Lieber & Blevins, ; Friederich & Brand, ; Lieber et al, ; Anapol & Barry, ; Murray et al, ; Kawakami et al, ; Payne et al, ; Oishi et al, ; Michilsens et al, ; Organ et al, ; Kikuchi, ; Hartstone‐Rose et al, ; Furuuchi et al, ; Mathewson et al, ; Perry et al, ; Terhune et al, ; Ito & Endo, ; Ogihara et al, ). By quantifying and comparing muscle architecture, such studies have investigated the scaling relationship between muscle architecture and body mass (Antón, ; Anapol et al, ; Eng et al, ; Perry & Wall, ; Perry et al, ; Taylor & Vinyard, 2013; Taylor et al, ), as well as changes in muscle architecture over the course of ontogeny (Herring & Wineski, ; Weijs et al, ; Allen et al, ; Pfaller et al, ; Lamas et al, ).…”

Section: Structure‐function Relationships Within Musclementioning

confidence: 99%

“…properties within a wide variety of mammalian and nonmammalian taxa (e.g., Roy et al, 1984a,b;Anapol & Jungers, 1986;Lieber & Blevins, 1989;Friederich & Brand, 1990;Lieber et al, 1992;Anapol & Barry, 1996;Murray et al, 2000;Kawakami et al, 2001;Payne et al, 2006;Oishi et al, 2008;Michilsens et al, 2009;Organ et al, 2009;Kikuchi, 2010;Hartstone-Rose et al, 2012;Furuuchi et al, 2013;Mathewson et al, 2014;Perry et al, 2014;Terhune et al, 2015;Ito & Endo, 2016;Ogihara et al, 2017). By quantifying and comparing muscle architecture, such studies have investigated the scaling relationship between muscle architecture and body mass (Ant on, 1999(Ant on, , 2000Anapol et al, 2008;Eng et al, 2008;Perry & Wall, 2008;Perry et al, 2011;Taylor & Vinyard, 2013;Taylor et al, 2015), as well as changes in muscle architecture over the course of ontogeny (Herring & Wineski, 1986;Weijs et al, 1987;Allen et al, 2010;Pfaller et al, 2011;Lamas et al, 2014).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Non‐Destructive Determination of Muscle Architectural Variables Through the Use of DiceCT

Dickinson

Stark

Kupczik

2018

The Anatomical Record

View full text Add to dashboard Cite

The fascicular architecture of skeletal muscle dictates functional parameters such as force production and contractile velocity. Muscle microarchitecture is typically determined by means of manual dissection, a technique that is inherently destructive to specimens. Furthermore, fascicle lengths and pennation angles are commonly assessed at only a limited number of sampling sites per muscle. We present the results of a digital technique to non-destructively assess muscle architectural variables for three jaw-adductor muscles within a specimen of the cercopithecine primate Macaca fascicularis (crab-eating macaque). The specimen is first subjected to a contrast-enhanced staining protocol to increase the density of internal soft tissues. High-resolution µCT scans are then collected and segmented to isolate individual muscles. A textural orientation algorithm is then applied to each muscle volume to reconstruct constituent muscle fascicles in three dimensions. Using this technique, we report muscle volume, fascicle length, angle of pennation, and physiological cross-sectional area (PCSA) for each muscle. These data are compared to results collected using traditional dissection of the contralateral muscles. Reconstructions of muscle volume and pennation angle closely correspond to the dissection results. The degree of similarity between measurements of fascicle length and PCSA varies between muscles, with temporalis demonstrating the greatest disparity between techniques; likely reflecting the complex geometry and fascicular arrangement of this muscle. The described technique samples a much larger number of fascicles than had previously been possible and non-destructively investigates the internal architecture of preserved specimens. We conclude that this approach demonstrates great potential for quantifying muscle internal architecture. Anat Rec, 301:363-377, 2018. © 2018 Wiley Periodicals, Inc.

show abstract

Section: Structure‐function Relationships Within Musclementioning

confidence: 99%

mentioning

confidence: 99%

Non‐Destructive Determination of Muscle Architectural Variables Through the Use of DiceCT

Dickinson

Stark

Kupczik

2018

The Anatomical Record

View full text Add to dashboard Cite

show abstract

“…PCSA was measured as it is an indicator of muscle force. The masticatory muscle data are based on Ito and Endo [24]. Measuring the fascicle length of the lateral pterygoid muscle was difficult in some species as the bundle was thin and brittle.…”

Section: Methodsmentioning

confidence: 99%

“…Thus, we focused on PCSA analyses of the temporalis, the whole masseter, the medial pterygoid and the three layers of masseter muscles. The measurement method of PCSA in Ito and Endo [24] is problematic for two reasons. First, the muscles were soaked in water prior to weighing as some materials were severely dried.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

The effect of the masticatory muscle physiological cross-sectional area on the structure of the temporomandibular joint in Carnivora

Ito

Endo

2019

The Journal of Veterinary Medical Science

Self Cite

View full text Add to dashboard Cite

We compared the temporomandibular joint structure between species of the order Carnivora and investigated its variation among family lineages. We also investigated the effect of the masticatory muscle physiological cross-sectional area (PCSA) on temporomandibular joint structure. The masticatory muscle is composed of multiple muscles, which contract in different directions and exert pressure on the temporomandibular joint. We investigated the effect of the ratio of each muscle’s PCSA—an indicator of muscle force—and muscle size relative to body size on temporomandibular joint structure. The temporalis PCSA relative to body size showed the highest correlation with temporomandibular joint structure. When the temporalis PCSA is large relative to body size, the preglenoid projects caudally, the postglenoid projects rostrally and the pre-postglenoid angle interval is small, indicating that the condyle is locked in the fossa to reinforce the temporomandibular joint. Most Carnivora use blade-like carnassial teeth when slicing food. However, dislocation occurs when the carnassial teeth are used by the temporalis muscle. Our results suggest that the temporomandibular joint is reinforced to prevent dislocation caused by the temporalis muscle. In Mustelidae, the temporomandibular joint with a rostrally projecting postglenoid is suitable for carnassial biting using the temporalis muscle. In Felidae, the force of the masseter onto the carnassial teeth is diverted to the canine by tightening the temporomandibular joint. In Canidae, the masticatory muscle arrangement is well-balanced, enabling combined action. Hence, reinforcement of the temporomandibular joint by bone structure is unnecessary.

show abstract

Ecomorphology of the Early Pleistocene Badger Meles dimitrius from Greece

et al. 2022

View full text Add to dashboard Cite

Compartive Study of Physiological Cross-Sectional Area of Masticatory Muscles among Species of Carnivora

Cited by 6 publications

References 46 publications

Non‐Destructive Determination of Muscle Architectural Variables Through the Use of DiceCT

Non‐Destructive Determination of Muscle Architectural Variables Through the Use of DiceCT

The effect of the masticatory muscle physiological cross-sectional area on the structure of the temporomandibular joint in Carnivora

Ecomorphology of the Early Pleistocene Badger Meles dimitrius from Greece

Contact Info

Product

Resources

About