ArticleScientific reports2020
Muscle architecture dynamics modulate performance of the superficial anterior temporalis muscle during chewing in capuchins.
Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed.
- Comparative and functional anatomy of masticatory muscles and bite force in opossums (Didelphimorphia, Didelphidae).Anatomical record (Hoboken, N.J. : 2007) · 2026Article
- How Food Geometry and Toughness Influence Ingestive Patterns in Lemurs.American journal of primatology · 2026Article
- Bite force-gape curves and passive tension costs in Macaca mulatta.The Journal of experimental biology · 2026Article
- Primate Swallowing Is Powered by Both Rotation and Contraction of Suprahyoid Muscles.American journal of biological anthropology · 2026Article
- Rat superficial masseter operates at long lengths during biting.Scientific reports · 2025Article
- Ontogenetic Changes in Feeding Behaviors in Tufted Capuchins.American journal of biological anthropology · 2025Article
- Behavioral correlates of fascicular organization: The confluence of muscle architectural anatomy and function.Anatomical record (Hoboken, N.J. : 2007) · 2025Review
- Jaw-Muscle Structure and Function in Primates: Insights Into Muscle Performance and Feeding-System Behaviors.Evolutionary anthropology · 2025Review
- The functional role of the rabbit digastric muscle during mastication.The Journal of experimental biology · 2024Article
- Do salamanders chew? An X-ray reconstruction of moving morphology analysis of ambystomatid intraoral feeding behaviours.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2023Article
- Introduction: food processing and nutritional assimilation in animals.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2023Article
- Gape drives regional variation in temporalis architectural dynamics in tufted capuchins.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2023Article
- Human in vivo medial gastrocnemius gear during active and passive muscle lengthening: effect of inconsistent methods and nomenclature on data interpretation.Biology open · 2023Article
- Temporal muscle thickness predicts mortality in prevalent hemodialysis patients.Revista da Associacao Medica Brasileira (1992) · 2022Article
- Grit your teeth and chew your food: Implications of food material properties and abrasives for rates of dental microwear formation in laboratoryPalaeogeography, palaeoclimatology, palaeoecology · 2021Article
- Differences in muscle mechanics underlie divergent optimality criteria between feeding and locomotor systems.Journal of anatomy · 2020Article
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4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Jaw-muscle architecture is a key determinant of jaw movements and bite force. While static length-force and force-velocity relationships are well documented in mammals, architecture dynamics of the chewing muscles and their impact on muscle performance are largely unknown. We provide novel data on how fiber architecture of the superficial anterior temporalis (SAT) varies dynamically during naturalistic feeding in tufted capuchins (Sapajus apella). We collected data on architecture dynamics (changes in muscle shape or the architectural gear ratio) during the gape cycle while subjects fed on foods of different mechanical properties. Architecture of the SAT varied with phases of the gape cycle, but gape distance accounted for the majority of dynamic changes in architecture. In addition, lower gear ratios (low muscle velocity relative to fascicle velocity) were observed when animals chewed on more mechanically resistant foods. At lower gear ratios, fibers rotated less during shortening resulting in smaller pinnation angles, a configuration that favors increased force production. Our results suggest that architectural dynamics may influence jaw-muscle performance by enabling the production of higher bite forces during the occlusal phase of the gape cycle and while processing mechanically challenging foods.
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