Bite Force Estimation and the Fiber Architecture of Felid Masticatory Muscles

  title={Bite Force Estimation and the Fiber Architecture of Felid Masticatory Muscles},
  author={Adam Hartstone‐Rose and Jonathan M. G. Perry and Caroline J. Morrow},
  journal={The Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology},
Increasingly, analyses of craniodental dietary adaptations take into account mechanical properties of foods. However, masticatory muscle fiber architecture has been described for relatively few lineages, even though an understanding of the scaling of this anatomy can yield important information about adaptations for stretch and strength in the masticatory system. Data on the mandibular adductors of 28 specimens from nine species of felids representing nearly the entire body size range of the… 
Bite Force and Masticatory Muscle Architecture Adaptations in the Dietarily Diverse Musteloidea (Carnivora)
Trends confirm previous findings observed within the carnivoran family Felidae (as well as within primates), suggesting that the mechanisms by which masticatory anatomy adapts to dietary ecology may be more universally consistent than previously recognized.
Dietary Correlates of Primate Masticatory Muscle Fiber Architecture
The methods used in the strepsirrhine study are applied to reevaluate these trends in platyrrhines and extend this research to include catarrhines: there is no evidence of negative allometry in platirrhines, and in primates broadly and catarrHines specifically, MM and PCSA scale with isometry or positive allometry.
Evaluating bony predictors of bite force across the order Carnivora
This study compares three cranial osteological techniques for estimating muscle size against dissection-derived muscle weights and physiological cross-sectional area within the jaw adductor musculature of 40 carnivoran taxa spanning eight families, four orders of magnitude in body size, and the full dietary spectrum of the order.
Ontogenetic changes to muscle architectural properties within the jaw-adductor musculature of Macaca fascicularis.
Larger individuals demonstrate adaptations during development towards maximizing gape potential and bite force potential at both an anterior and posterior bitepoint within older, larger-bodied individuals.
Scaling and Accommodation of Jaw Adductor Muscles in Canidae
Findings suggest that head shape is partly influenced by the need to house isometrically scaling muscles on a neurocranium scaling with negative allometry, and principal component analysis suggests that skull shape changes allow the skull to accommodate a relative enlargement of the jaw adductors compared with the endocranium.
Scaling of Anatomically Derived Maximal Bite Force in Primates
By combining muscle architectural data with biomechanical variables relating to the jaw, anatomically derived maximum bite force estimations for 23 species of catarrhine and platyrrhine primates are produced and an absence of a dietary signal in the scaling of bite force is implied.
The Ontogeny of Masticatory Muscle Architecture in Microcebus murinus
Study of the masticatory muscles in a large intraspecific sample of a small, Malagasy primate, Microcebus murinus, observed PCSA and muscle mass to increase rapidly and plateau in adulthood through senescence, suggesting that subsequent changes in PCSA are driven by changes in muscle mass.
How Does Masticatory Muscle Architecture Covary with Mandibular Shape in Domestic Dogs?
Results suggest muscle size and thus attachment area requirements for individual muscles are likely drivers of mandibular shape and domestication of dogs has not resulted in a disuse phenotype characterized by a decoupling between form and function.
Functional morphology of the jaw adductor muscles in the Canidae
The most biomechanically demanding masticatory function is canine biting, and the highest strain energy values were reported in this loading condition, particularly in the zygomatic arches and caudal rostrum.
Masticatory system integration in a commensal canid: interrelationships between bones, muscles and bite force in the red fox
Strong interrelationships between the components of the masticatory system in red foxes suggest that it is strongly integrated, but not more so than for dogs, yet, the components are less variable in foxes than in dogs.


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Cranial strength in relation to estimated biting forces in some mammals
Whether the bending strength of the skull in some mammals correlates with the maximal loads imposed through the masticatory apparatus is examined, using the methods of beam theory.
The Jaw Adductors of Strepsirrhines in Relation to Body Size, Diet, and Ingested Food Size
Data on jaw adductor fiber architecture and experimentally determined ingested food size in a broad sample of 24 species of extant strepsirrhines allows us to evaluate several hypotheses about the influence of body size and diet on the masticatory muscles.
Biomechanical scaling of the hominoid mandibular symphysis
Experimental investigation of mandibular bone strain in cercopithecine primates has established that the mandible is bent in the transverse plane during the power stroke of mastication. Additional
Bite force production capability and efficiency in Neandertals and modern humans.
It is concluded that masticatory biomechanical adaptation does not underlie variation in the facial skeleton of later Pleistocene Homo in general, and that continued exploration of alternative explanations for Neandertal facial architecture seems warranted.
Comparative functional analysis of skull morphology of tree-gouging primates.
It is predicted that tree-gouging primates do not generate unusually large forces, but that they do use relatively large gapes during gouging, and 13 morphological predictions based on the expectation that gouging involves relatively large jaw forces and/or jaw gapes are developed.
Molar scaling in strepsirrhine primates.
Fiber architecture of the extensors of the hindlimb in semiterrestrial and arboreal guenons.
Fiber architecture of the extensor musculature of the knee and ankle is examined in two African gueon species and interspecific differences in the triceps surae indicate the inherent flexibility of muscles may be preadaptive to a primary species shift in locomotor modality until the bony morphology is able to adapt through natural selection.
Mandibular Function and Biomechanical Stress and Scaling
The stress analysis and an allometric analysis of mandibular dimensions in female cercopithecine (Old World) monkeys indicates that allometric changes in the symphysis are readily understood if the mandible is modelled as a curved beam.
Physiological cross-section of the human jaw muscles.
The cross-sectional areas of the masseter, temporalis, medial pterygoid and lateral pterygoid muscles were determined by means of computer tomography in 16 male subjects with healthy dentitions. The