Scholars@Duke
Andrea Beth Taylor

Andrea Beth Taylor

Adjunct Professor in the Department of Orthopaedic Surgery
Orthopaedic Surgery, Physical Therapy
andrea.taylor@duke.edu
BOX104002, Durham, NC 27710
DPT Program, Erwin Square Plaza, 2200 West Main Street Wing B, Durham, NC 27710
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Selected Publications

Ontogenetic changes in jaw leverage and skull shape in tufted and untufted capuchins.

Journal Article J Morphol · May 2024 The ontogeny of feeding is characterized by shifting functional demands concurrent with changes in craniofacial anatomy; relationships between these factors will look different in primates with disparate feeding behaviors during development. This study exa ... Full text Link to item Cite

Tradeoffs between bite force and gape in Eulemur and Varecia.

Journal Article J Morphol · May 2024 In 1974, Sue Herring described the relationship between two important performance variables in the feeding system, bite force and gape. These variables are inversely related, such that, without specific muscular adaptations, most animals cannot produce hig ... Full text Link to item Cite

The impact of measurement technique and sampling on estimates of skeletal muscle fibre architecture.

Journal Article Anat Rec (Hoboken) · February 26, 2024 Skeletal muscle fibre architecture provides important insights into performance of vertebrate locomotor and feeding behaviours. Chemical digestion and in situ sectioning of muscle bellies along their lengths to expose fibres, fibre orientation and intramus ... Full text Link to item Cite

Gape drives regional variation in temporalis architectural dynamics in tufted capuchins.

Journal Article Philos Trans R Soc Lond B Biol Sci · December 4, 2023 Dynamic changes in jaw movements and bite forces depend on muscle architectural and neural factors that have rarely been compared within the same muscle. Here we investigate how regional muscle architecture dynamics-fascicle rotation, shortening, lengtheni ... Full text Link to item Cite

Dynamic finite element modelling of the macaque mandible during a complete mastication gape cycle.

Journal Article Philos Trans R Soc Lond B Biol Sci · December 4, 2023 Three-dimensional finite element models (FEMs) are powerful tools for studying the mechanical behaviour of the feeding system. Using validated, static FEMs we have previously shown that in rhesus macaques the largest food-related differences in strain magn ... Full text Link to item Cite

Ontogenetic changes in bite force and gape in tufted capuchins.

Journal Article J Exp Biol · August 1, 2023 Bite force and gape are two important performance metrics of the feeding system, and these metrics are inversely related for a given muscle size because of fundamental constraints in sarcomere length-tension relationships. How these competing performance m ... Full text Link to item Cite

Does the model reflect the system? When two-dimensional biomechanics is not 'good enough'.

Journal Article J R Soc Interface · January 2023 Models are mathematical representations of systems, processes or phenomena. In biomechanics, finite-element modelling (FEM) can be a powerful tool, allowing biologists to test form-function relationships in silico, replacing or extending results of in vivo ... Full text Link to item Cite

Macaca mulatta is a good model for human mandibular fixation research

Journal Article Royal Society Open Science · November 16, 2022 Biomechanical and clinical studies have yet to converge on the optimal fixation technique for angle fractures, one of the most common and controversial fractures in terms of fixation approach. Prior pre-clinical studies have used a variety of animal models ... Full text Cite

Editorial announcement.

Journal Article J Hum Evol · December 2021 Full text Link to item Cite

The influence of jaw-muscle fibre-type phenotypes on estimating maximum muscle and bite forces in primates.

Journal Article Interface Focus · October 6, 2021 Numerous anthropological studies have been aimed at estimating jaw-adductor muscle forces, which, in turn, are used to estimate bite force. While primate jaw adductors show considerable intra- and intermuscular heterogeneity in fibre types, studies general ... Full text Link to item Cite

Comparative biomechanics of the Pan and Macaca mandibles during mastication: Finite element modelling of loading, deformation and strain regimes

Journal Article Interface Focus · August 13, 2021 The mechanical behaviour of the mandibles of Pan and Macaca during mastication was compared using finite element modelling. Muscle forces were calculated using species-specific measures of physiological cross-sectional area and scaled using electromyograph ... Full text Cite

Fiber-type phenotype of the jaw-closing muscles in Gorilla gorilla, Pan troglodytes, and Pan paniscus: A test of the Frequent Recruitment Hypothesis.

Journal Article J Hum Evol · February 2021 Skeletal muscle fiber types are important determinants of the contractile properties of muscle fibers, such as fatigue resistance and shortening velocity. Yet little is known about how jaw-adductor fiber types correlate with feeding behavior in primates. C ... Full text Link to item Cite

Biomechanics of the mandible of Macaca mulatta during the power stroke of mastication: Loading, deformation, and strain regimes and the impact of food type.

Journal Article J Hum Evol · October 2020 Mandible morphology has yet to yield definitive information on primate diet, probably because of poor understanding of mandibular loading and strain regimes, and overreliance on simple beam models of mandibular mechanics. We used a finite element model of ... Full text Link to item Cite

Muscle architecture dynamics modulate performance of the superficial anterior temporalis muscle during chewing in capuchins.

Journal Article Sci Rep · April 14, 2020 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 ... Full text Link to item Cite

The dental microwear of hard-object feeding in laboratory Sapajus apella and its implications for dental microwear formation.

Journal Article Am J Phys Anthropol · March 2020 OBJECTIVES: This study seeks to determine if (a) consumption of hard food items or a mixture of food items leads to the formation of premolar or molar microwear in laboratory capuchin monkeys (Sapajus apella) in one feeding session and (b) rates of microwe ... Full text Link to item Cite

Ontogenetic changes in jaw leverage and skull shape in tufted and untufted capuchins.

Journal Article J Morphol · May 2024 The ontogeny of feeding is characterized by shifting functional demands concurrent with changes in craniofacial anatomy; relationships between these factors will look different in primates with disparate feeding behaviors during development. This study exa ... Full text Link to item Cite

Tradeoffs between bite force and gape in Eulemur and Varecia.

Journal Article J Morphol · May 2024 In 1974, Sue Herring described the relationship between two important performance variables in the feeding system, bite force and gape. These variables are inversely related, such that, without specific muscular adaptations, most animals cannot produce hig ... Full text Link to item Cite

The impact of measurement technique and sampling on estimates of skeletal muscle fibre architecture.

Journal Article Anat Rec (Hoboken) · February 26, 2024 Skeletal muscle fibre architecture provides important insights into performance of vertebrate locomotor and feeding behaviours. Chemical digestion and in situ sectioning of muscle bellies along their lengths to expose fibres, fibre orientation and intramus ... Full text Link to item Cite

Gape drives regional variation in temporalis architectural dynamics in tufted capuchins.

Journal Article Philos Trans R Soc Lond B Biol Sci · December 4, 2023 Dynamic changes in jaw movements and bite forces depend on muscle architectural and neural factors that have rarely been compared within the same muscle. Here we investigate how regional muscle architecture dynamics-fascicle rotation, shortening, lengtheni ... Full text Link to item Cite

Dynamic finite element modelling of the macaque mandible during a complete mastication gape cycle.

Journal Article Philos Trans R Soc Lond B Biol Sci · December 4, 2023 Three-dimensional finite element models (FEMs) are powerful tools for studying the mechanical behaviour of the feeding system. Using validated, static FEMs we have previously shown that in rhesus macaques the largest food-related differences in strain magn ... Full text Link to item Cite

Ontogenetic changes in bite force and gape in tufted capuchins.

Journal Article J Exp Biol · August 1, 2023 Bite force and gape are two important performance metrics of the feeding system, and these metrics are inversely related for a given muscle size because of fundamental constraints in sarcomere length-tension relationships. How these competing performance m ... Full text Link to item Cite

Does the model reflect the system? When two-dimensional biomechanics is not 'good enough'.

Journal Article J R Soc Interface · January 2023 Models are mathematical representations of systems, processes or phenomena. In biomechanics, finite-element modelling (FEM) can be a powerful tool, allowing biologists to test form-function relationships in silico, replacing or extending results of in vivo ... Full text Link to item Cite

Macaca mulatta is a good model for human mandibular fixation research

Journal Article Royal Society Open Science · November 16, 2022 Biomechanical and clinical studies have yet to converge on the optimal fixation technique for angle fractures, one of the most common and controversial fractures in terms of fixation approach. Prior pre-clinical studies have used a variety of animal models ... Full text Cite

Editorial announcement.

Journal Article J Hum Evol · December 2021 Full text Link to item Cite

The influence of jaw-muscle fibre-type phenotypes on estimating maximum muscle and bite forces in primates.

Journal Article Interface Focus · October 6, 2021 Numerous anthropological studies have been aimed at estimating jaw-adductor muscle forces, which, in turn, are used to estimate bite force. While primate jaw adductors show considerable intra- and intermuscular heterogeneity in fibre types, studies general ... Full text Link to item Cite

Comparative biomechanics of the Pan and Macaca mandibles during mastication: Finite element modelling of loading, deformation and strain regimes

Journal Article Interface Focus · August 13, 2021 The mechanical behaviour of the mandibles of Pan and Macaca during mastication was compared using finite element modelling. Muscle forces were calculated using species-specific measures of physiological cross-sectional area and scaled using electromyograph ... Full text Cite

Fiber-type phenotype of the jaw-closing muscles in Gorilla gorilla, Pan troglodytes, and Pan paniscus: A test of the Frequent Recruitment Hypothesis.

Journal Article J Hum Evol · February 2021 Skeletal muscle fiber types are important determinants of the contractile properties of muscle fibers, such as fatigue resistance and shortening velocity. Yet little is known about how jaw-adductor fiber types correlate with feeding behavior in primates. C ... Full text Link to item Cite

Biomechanics of the mandible of Macaca mulatta during the power stroke of mastication: Loading, deformation, and strain regimes and the impact of food type.

Journal Article J Hum Evol · October 2020 Mandible morphology has yet to yield definitive information on primate diet, probably because of poor understanding of mandibular loading and strain regimes, and overreliance on simple beam models of mandibular mechanics. We used a finite element model of ... Full text Link to item Cite

Muscle architecture dynamics modulate performance of the superficial anterior temporalis muscle during chewing in capuchins.

Journal Article Sci Rep · April 14, 2020 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 ... Full text Link to item Cite

The dental microwear of hard-object feeding in laboratory Sapajus apella and its implications for dental microwear formation.

Journal Article Am J Phys Anthropol · March 2020 OBJECTIVES: This study seeks to determine if (a) consumption of hard food items or a mixture of food items leads to the formation of premolar or molar microwear in laboratory capuchin monkeys (Sapajus apella) in one feeding session and (b) rates of microwe ... Full text Link to item Cite

The Source and the Course of the Articular Branches to the T4-T8 Zygapophysial Joints.

Journal Article Pain Med · December 1, 2019 OBJECTIVE: To define the source and the course of the articular branches to the midthoracic zygapophysial ("z") joints. DESIGN: Cadaveric dissection. SETTING: The Gross Anatomy Laboratory of the Duke University School of Medicine. SUBJECTS: Ten human cadav ... Full text Link to item Cite

The influence of masseter and temporalis sarcomere length operating ranges as determined by laser diffraction on architectural estimates of muscle force and excursion in macaques (Macaca fascicularis and Macaca mulatta).

Journal Article Arch Oral Biol · September 2019 OBJECTIVE: Determine sarcomere length (Ls) operating ranges of the superficial masseter and temporalis in vitro in a macaque model and examine the impact of position-dependent variation on Ls and architectural estimates of muscle function (i.e., fiber leng ... Full text Link to item Cite

Joint angular excursions during cyclical behaviors differ between tetrapod feeding and locomotor systems.

Journal Article J Exp Biol · April 30, 2019 Tetrapod musculoskeletal diversity is usually studied separately in feeding and locomotor systems. However, comparisons between these systems promise important insight into how natural selection deploys the same basic musculoskeletal toolkit - connective t ... Full text Link to item Cite

The mechanical effect of the periodontal ligament on bone strain regimes in a validated finite element model of a macaque mandible

Journal Article Frontiers in Bioengineering and Biotechnology · January 1, 2019 The primary anatomical function of the periodontal ligament (PDL) is to attach teeth to their sockets. However, theoretical and constitutive mechanical models have proposed that during mastication the PDL redistributes local occlusal loads and reduces the ... Full text Cite

Proteomics and immunohistochemistry identify the expression of α-cardiac myosin heavy chain in the jaw-closing muscles of sooty mangabeys (order Primates).

Journal Article Arch Oral Biol · July 2018 OBJECTIVE: The jaw-closing muscles of humans and nonprimate mammals express alpha-cardiac fibers but MyHC α-cardiac has not been identified in the jaw adductors of nonhuman primates. We determined whether MyHC α-cardiac is expressed in the superficial mass ... Full text Link to item Cite

Fiber type composition of epaxial muscles is geared toward facilitating rapid spinal extension in the leaper Galago senegalensis.

Conference Am J Phys Anthropol · May 2018 OBJECTIVES: We hypothesized that the vertical leaper Galago senegalensis will have epaxial extensor muscles with a fast fiber phenotype to facilitate rapid spinal extension during leaping in comparison to the slow-moving quadruped Nycticebus coucang. To te ... Full text Link to item Cite

Jaw-Muscle Fiber Architecture and Leverage in the Hard-Object Feeding Sooty Mangabey are not Structured to Facilitate Relatively Large Bite Forces Compared to Other Papionins.

Journal Article Anat Rec (Hoboken) · February 2018 Numerous studies have sought to link craniofacial morphology with behavioral ecology in primates. Extant hard-object feeders have been of particular interest because of their potential to inform our understanding about the diets of early fossil hominins. S ... Full text Link to item Cite

Participation, representation, and shared experiences of women scholars in biological anthropology.

Journal Article Am J Phys Anthropol · January 2018 American Association of Physical Anthropologists (AAPA) membership surveys from 1996 and 1998 revealed significant gender disparities in academic status. A 2014 follow-up survey showed that gender equality had improved, particularly with respect to the num ... Full text Link to item Cite

In vivo bone strain and finite element modeling of a rhesus macaque mandible during mastication.

Journal Article Zoology (Jena) · October 2017 Finite element analysis (FEA) is a commonly used tool in musculoskeletal biomechanics and vertebrate paleontology. The accuracy and precision of finite element models (FEMs) are reliant on accurate data on bone geometry, muscle forces, boundary conditions ... Full text Link to item Cite

Functional correlates of the position of the axis of rotation of the mandible during chewing in non-human primates.

Journal Article Zoology (Jena) · October 2017 The location of the axis of rotation (AoR) of the mandible was quantified using the helical axis (HA) in eight individuals from three species of non-human primates: Papio anubis, Cebus apella, and Macaca mulatta. These data were used to test three hypothes ... Full text Link to item Cite

Scaling of rotational inertia of primate mandibles.

Journal Article J Hum Evol · May 2017 The relative importance of pendulum mechanics and muscle mechanics in chewing dynamics has implications for understanding the optimality criteria driving the evolution of primate feeding systems. The Spring Model (Ross et al., 2009b), which modeled the pri ... Full text Link to item Cite

Muscle strain field estimation using object tracking in high definition video sequences

Conference IFMBE Proceedings · January 1, 2017 Measuring muscle activation is a valuable tool for the determination of diagnostic-focused parameters and the assessment of therapeutic intervention effectiveness. This paper presents a low cost, portable system for estimating muscular strain by measuring ... Full text Cite

Primate dietary ecology in the context of food mechanical properties.

Journal Article J Hum Evol · September 2016 Substantial variation exists in the mechanical properties of foods consumed by primate species. This variation is known to influence food selection and ingestion among non-human primates, yet no large-scale comparative study has examined the relationships ... Full text Link to item Cite

In vivo bone strain in the mandibular corpus of Sapajus during a range of oral food processing behaviors.

Journal Article J Hum Evol · September 2016 It has been hypothesized that mandibular corpus morphology of primates is related to the material properties of the foods that they chew. However, chewing foods with different material properties is accompanied by low levels of variation in mandibular stra ... Full text Link to item Cite

Morphological variation in Homo erectus and the origins of developmental plasticity.

Journal Article Philos Trans R Soc Lond B Biol Sci · July 5, 2016 Homo erectus was the first hominin to exhibit extensive range expansion. This extraordinary departure from Africa, especially into more temperate climates of Eurasia, has been variously related to technological, energetic and foraging shifts. The temporal ... Full text Link to item Cite

Epaxial muscle fiber architecture favors enhanced excursion and power in the leaper Galago senegalensis.

Journal Article J Anat · October 2015 Galago senegalensis is a habitual arboreal leaper that engages in rapid spinal extension during push-off. Large muscle excursions and high contraction velocities are important components of leaping, and experimental studies indicate that during leaping by ... Full text Link to item Cite

Jaw-muscle force and excursion scale with negative allometry in platyrrhine primates

Journal Article American Journal of Physical Anthropology · October 1, 2015 Objectives Platyrrhines span two orders of magnitude in body size and are characterized by diverse feeding behaviors and diets. While size plays an important role in primate feeding behavior and masticatory apparatus morphology, we know little about size-c ... Full text Cite

Jaw-muscle architecture and mandibular morphology influence relative maximum jaw gapes in the sexually dimorphic Macaca fascicularis.

Journal Article J Hum Evol · May 2015 Maximum jaw gape is a performance variable related to feeding and non-feeding oral behaviors, such as canine gape displays, and is influenced by several factors including jaw-muscle fiber architecture, muscle position on the skull, and jaw morphology. Maxi ... Full text Link to item Cite

Eccentric training for prevention of hamstring injuries may depend on intervention compliance: a systematic review and meta-analysis.

Journal Article Br J Sports Med · March 2015 BACKGROUND: Hamstring injury is a prevalent muscle injury in sports. Inconclusive evidence exists for eccentric hamstring strengthening to prevent hamstring injuries. One reason for this discrepancy may be the influence intervention non-compliance has on i ... Full text Link to item Cite

Locomotor activity influences muscle architecture and bone growth but not muscle attachment site morphology.

Journal Article J Hum Evol · January 2015 The ability to make behavioural inferences from skeletal remains is critical to understanding the lifestyles and activities of past human populations and extinct animals. Muscle attachment site (enthesis) morphology has long been assumed to reflect muscle ... Full text Link to item Cite

Food mechanical properties, feeding ecology, and the mandibular morphology of wild orangutans.

Journal Article J Hum Evol · October 2014 Bornean orangutan mandibular morphology has been functionally linked to the exploitation of hard and tough foods, based on evidence that Pongo pygmaeus wurmbii spends a greater percentage of time feeding on bark, seeds and vegetation compared with Pongo ab ... Full text Link to item Cite

Temporomandibular joint pain: a critical role for Trpv4 in the trigeminal ganglion.

Journal Article Pain · August 2013 Temporomandibular joint disorder (TMJD) is known for its mastication-associated pain. TMJD is medically relevant because of its prevalence, severity, chronicity, the therapy-refractoriness of its pain, and its largely elusive pathogenesis. Against this bac ... Full text Open Access Link to item Cite

Viewpoints: feeding mechanics, diet, and dietary adaptations in early hominins.

Journal Article Am J Phys Anthropol · July 2013 Inference of feeding adaptation in extinct species is challenging, and reconstructions of the paleobiology of our ancestors have utilized an array of analytical approaches. Comparative anatomy and finite element analysis assist in bracketing the range of c ... Full text Link to item Cite

The relationships among jaw-muscle fiber architecture, jaw morphology, and feeding behavior in extant apes and modern humans.

Journal Article Am J Phys Anthropol · May 2013 The jaw-closing muscles are responsible for generating many of the forces and movements associated with feeding. Muscle physiologic cross-sectional area (PCSA) and fiber length are two architectural parameters that heavily influence muscle function. While ... Full text Link to item Cite

Scaling of jaw-muscle fiber architecture in platyrrhines: a preliminary assessment

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · 2012 Cite

Are we looking for loads in all the right places? New research directions for studying the masticatory apparatus of New World monkeys.

Journal Article Anat Rec (Hoboken) · December 2011 New World monkeys display a wide range of masticatory apparatus morphologies related to their diverse diets and feeding strategies. While primatologists have completed many studies of the platyrrhine masticatory apparatus, particularly morphometric analyse ... Full text Open Access Link to item Cite

The instantaneous center of rotation of the mandible in nonhuman primates.

Journal Article Integr Comp Biol · August 2011 Kinematic analyses of mandibular movement in humans demonstrate that the mandibular instantaneous center of rotation (ICoR) is commonly located near the level of the occlusal plane and varies in its position during a chewing sequence. Few data are availabl ... Full text Link to item Cite

Linking feeding ecology and jaw form in two species of wild orangutans

Conference AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · 2011 Cite

A preliminary analysis of the relationship between jaw-muscle architecture and jaw-muscle electromyography during chewing across primates.

Journal Article Anat Rec (Hoboken) · April 2010 The architectural arrangement of the fibers within a muscle has a significant impact on how a muscle functions. Recent work on primate jaw-muscle architecture demonstrates significant associations with dietary variation and feeding behaviors. In this study ... Full text Link to item Cite

Jaw-muscle fiber architecture in tufted capuchins favors generating relatively large muscle forces without compromising jaw gape.

Journal Article J Hum Evol · December 2009 Tufted capuchins (sensu lato) are renowned for their dietary flexibility and capacity to exploit hard and tough objects. Cebus apella differs from other capuchins in displaying a suite of craniodental features that have been functionally and adaptively lin ... Full text Link to item Cite

The morphology of the masticatory apparatus facilitates muscle force production at wide jaw gapes in tree-gouging common marmosets (Callithrix jacchus).

Journal Article J Exp Biol · December 2009 Common marmosets (Callithrix jacchus) generate wide jaw gapes when gouging trees with their anterior teeth to elicit tree exudate flow. Closely related cotton-top tamarins (Saguinus oedipus) do not gouge trees but share similar diets including exudates. Ma ... Full text Link to item Cite

The functional correlates of jaw-muscle fiber architecture in tree-gouging and nongouging callitrichid monkeys.

Journal Article Am J Phys Anthropol · July 2009 Featured Publication Common (Callithrix jacchus) and pygmy (Cebuella pygmaea) marmosets and cotton-top tamarins (Saguinus oedipus) share broadly similar diets of fruits, insects, and tree exudates. Marmosets, however, differ from tamarins in actively gouging trees with their a ... Full text Link to item Cite

Functional correlates of fiber architecture of the lateral caudal musculature in prehensile and nonprehensile tails of the platyrrhini (primates) and procyonidae (carnivora).

Journal Article Anat Rec (Hoboken) · June 2009 Featured Publication Prehensile-tailed platyrrhines (atelines and Cebus) and procyonids (Potos) display bony tail features that have been functionally and adaptively linked to their prehensile behaviors, particularly the need to resist relatively greater bending and torsional ... Full text Link to item Cite

The functional significance of variation in jaw form in orangutans: The African apes as an ecogeographic model

Journal Article · May 1, 2009 African apes and orangutans experience temporal and spatial fluctuations in fruit availability with similar behavioral consequences. Relying on the African apes as a comparative ecogeographic model, this chapter examines jaw form among Pongo pygmaeus morio ... Full text Cite

Food material properties and mandibular load resistance abilities in large-bodied hominoids.

Journal Article J Hum Evol · October 2008 Featured Publication Numerous comparative studies have sought to demonstrate a functional link between feeding behavior, diet, and mandibular form in primates. In lieu of data on the material properties of foods ingested and masticated, many investigators have relied on qualit ... Full text Link to item Cite

Variation in brain size and ecology in Pongo.

Journal Article J Hum Evol · January 2007 Featured Publication Numerous hypotheses have been advanced to explain relative increases in brain size in primates and other mammals. However, notably less attention has been directed towards addressing the biological limits to increasing brain size. Here we explore variation ... Full text Link to item Cite

Jaw-muscle fiber architecture in Cebus.

Journal Article AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · 2007 Cite

Dietary consistency and plasticity of masseter fiber architecture in postweaning rabbits.

Journal Article Anat Rec A Discov Mol Cell Evol Biol · October 2006 Featured Publication Dietary consistency has been shown to influence cross-sectional area and fiber type composition of the masticatory muscles. However, little is known about the effects of dietary consistency on masticatory muscle fiber architecture. In this study, we explor ... Full text Link to item Cite

Feeding behavior, diet, and the functional consequences of jaw form in orangutans, with implications for the evolution of Pongo.

Journal Article J Hum Evol · April 2006 Featured Publication Orangutans are amongst the most craniometrically variable of the extant great apes, yet there has been no attempt to explicitly link this morphological variation with observed differences in behavioral ecology. This study explores the relationship between ... Full text Link to item Cite

Diet and mandibular morphology in African apes

Journal Article International Journal of Primatology · February 1, 2006 Investigations seeking to understand the relationship between mandibular form, function, and dietary behavior have focused on the mandibular corpus and symphysis. African apes vary along a gradient of folivory/frugivory, yet few studies have evaluated the ... Full text Cite

Size and shape dimorphism in great ape mandibles and implications for fossil species recognition.

Journal Article Am J Phys Anthropol · January 2006 Featured Publication Sexual dimorphism is an important source of morphological variation, and species differences in dimorphism may be reflected in magnitude, pattern, or both. While the extant great apes are commonly used as a reference sample for distinguishing between sexua ... Full text Link to item Cite

Variation in brain size and ecology in Pongo.

Journal Article AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · 2006 Cite

A comparative analysis of temporomandibular joint morphology in the African apes.

Journal Article J Hum Evol · June 2005 Featured Publication A number of researchers have suggested a functional relationship between dietary variation and temporomandibular joint (TMJ) morphology, yet few studies have evaluated TMJ form in the African apes. In this study, I compare TMJ morphology in adults and duri ... Full text Link to item Cite

Diet and jaw form in Ponga

Journal Article AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · 2005 Cite

Comparative analysis of masseter fiber architecture in tree-gouging (Callithrix jacchus) and nongouging (Saguinus oedipus) callitrichids.

Journal Article J Morphol · September 2004 Featured Publication Common marmosets (Callithrix jacchus) and cotton-top tamarins (Saguinus oedipus) (Callitrichidae, Primates) share a broadly similar diet of fruits, insects, and tree exudates. Common marmosets, however, differ from tamarins by actively gouging trees with t ... Full text Link to item Cite

Patterns of mandibular variation in Pan and Gorilla and implications for African ape taxonomy.

Journal Article J Hum Evol · May 2003 Featured Publication Pan and Gorilla taxonomy is currently in a state of flux, with the number of existing species and subspecies of common chimpanzee and gorilla having been recently challenged. While Pan and Gorilla systematics have been evaluated on the basis of craniometri ... Full text Link to item Cite

Book reviews

Journal Article American Journal of Physical Anthropology · March 2003 Full text Cite

Patterns of mandibular variation in Pan and Gorilla.

Journal Article AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY · 2003 Cite

Introduction: Gorilla biology: Multiple perspectives on variation within a genus

Conference GORILLA BIOLOGY: A MULTIDISCIPLINARY PERSPECTIVE · 2003 Cite

Masticatory form and function in the African apes.

Journal Article Am J Phys Anthropol · February 2002 Featured Publication This study examines variability in masticatory morphology as a function of dietary preference among the African apes. The African apes differ in the degree to which they consume leaves and other fibrous vegetation. Gorilla gorilla beringei, the eastern mou ... Full text Link to item Cite

Scapula form and biomechanics in gorillas.

Journal Article J Hum Evol · November 1997 Gorillas are generating renewed interest as mounting evidence from field and molecular studies strongly suggests the western lowland (Gorilla gorilla gorilla) and eastern mountain (Gorilla gorilla beringei) gorillas are considerably more distinct than has ... Full text Link to item Cite

Relative growth, ontogeny, and sexual dimorphism in gorilla (Gorilla gorilla gorilla and G. g. beringei): evolutionary and ecological considerations.

Journal Article Am J Primatol · 1997 Gorillas are the largest and among the most sexually dimorphic of all extant primates. While gorillas have been incorporated in broad-level comparisons among large-bodied hominoids or in studies of the African apes, comparisons between gorilla subspecies h ... Full text Link to item Cite

Effects of ontogeny and sexual dimorphism on scapula morphology in the mountain gorilla (Gorilla gorilla beringei).

Journal Article Am J Phys Anthropol · December 1995 Scapular measurements were obtained from growth series of the sexually dimorphic mountain gorilla (Gorilla gorilla beringei). Juveniles, subadults, and adults were compared to determine if scapula morphology varies with age. Analyses reveal significant (P ... Full text Link to item Cite

Modeling differences in biological shape in two species of Peromyscus

Journal Article Journal of Mammalogy · January 1, 1995 Full text Cite

Shape of scapular fossae in freshwater and marine dolphins

Journal Article Journal of Mammalogy · January 1, 1994 Full text Cite

Dental and skeletal reduction as a consequence of environmental stress

Journal Article Acta Zoologica Fennica · January 1, 1992 Perinatal exposure to environmental stress consistently results in an increased magnitude of fluctuating asymmetry of the dentition and other osseous structures of weanling rodents. Results support the concept of a generalized stress response and are discu ... Cite

Effects of perinatal alcohol exposure and dietary calcium supplements on skeletal and dental growth in rats.

Journal Article Acta Anat (Basel) · 1991 Osteoporosis, hypocalcemia and skeletal size reduction are all common correlates of perinatal alcohol exposure. The present study assesses the effects of dietary calcium supplements on reversing perinatal alcohol-induced osteopenia. One hundred and twenty- ... Full text Link to item Cite