Biren A. Patel, PhD
Biren A. Patel, PhD
Associate Professor of Clinical Integrative Anatomical Sciences
Integrative Anatomical Sciences
BMT 404 1333 San Pablo Street Health Sciences Campus Los Angeles
I am a biological anthropologist with scholarly interests in evolutionary and functional morphology and my research programs investigate a variety of questions about human and non-human primate evolution. In particular, I am interested in better understanding the evolution of primate locomotor behavior, and more specifically the evolution of human and non-human primate hand and foot function. Exploration of these issues has led me to undertake research projects in a number of areas including comparative biomechanics, musculoskeletal functional anatomy, evolutionary morphology and paleontology. My research is hypothesis driven and relies on an interdisciplinary approach that integrates experimental methods with traditional and state-of-the-art morphometrics, and may draw on data acquired from live animals (lab and wild), cadavers, extant and fossil skeletal material, and 3D clinical and pre-clinical imaging (i.e., CT and µCT). Taken together, my research has offered insights into the biomechanical relationships between particular behaviors such as locomotion and manipulation, with aspects of anatomy such as hand/foot skeletal shape and internal bone architecture. Because I am also interested in understanding when and how the morphological and locomotor diversity observed in human and non-human primates came about, many of my projects involve describing and interpreting fossil material, as well as conducting new paleontological fieldwork (most recently in Miocene of Kashmir, India).

Strength properties of extant hominoid hallucal and pollical metapodials J Hum Evol. 2020 Jun; 143:102774. . View in PubMed

Phalangeal curvature in a chimpanzee raised like a human: Implications for inferring arboreality in fossil hominins Proc Natl Acad Sci U S A. 2020 May 26; 117(21):11223-11225. . View in PubMed

Calcaneal elongation and bone strength in leaping galagids Am J Phys Anthropol. 2020 Mar; 171(3):430-438. . View in PubMed

Getting its feet on the ground: Elucidating Paralouatta’s semi-terrestriality using the virtual morpho-functional toolbox Frontiers in Earth Science. 2020; 8:79. . View in PubMed

Evaluation of Articular Surface Similarity of Hemi-Hamate Grafts and Proximal Middle Phalanx Morphology: A 3D Geometric Morphometric Approach J Hand Surg Am. 2019 Feb; 44(2):121-128. . View in PubMed

Histovariability in human clavicular cortical bone microstructure and its mechanical implications J Anat. 2019 11; 235(5):873-882. . View in PubMed

New Sivapithecus specimen from Ramnagar (Jammu & Kashmir), India and a taxonomic revision of Ramnagar hominoids Journal of Human Evolution. 2019; 135:102665. . View in PubMed

Inter-ray variation in metatarsal strength properties in humans and African apes: Implications for inferring bipedal biomechanics in the Olduvai Hominid 8 foot J Hum Evol. 2018 08; 121:147-165. . View in PubMed

Effects of selective breeding for high voluntary wheel-running behavior on femoral nutrient canal size and abundance in house mice J Anat. 2018 08; 233(2):193-203. . View in PubMed

Subchondral Bone Radiodensity Patterns in the Glenoid Fossa of Ape and Human Scapulae Anat Rec (Hoboken). 2018 05; 301(5):776-785. . View in PubMed

Ontogeny of hallucal metatarsal rigidity and shape in the rhesus monkey (Macaca mulatta) and chimpanzee (Pan troglodytes) J Anat. 2018 Jan; 232(1):39-53. . View in PubMed

Evolution and function of the hominin forefoot Proc Natl Acad Sci U S A. 2018 08 28; 115(35):8746-8751. . View in PubMed

Catarrhine hallucal metatarsals from the early Miocene site of Songhor, Kenya J Hum Evol. 2017 07; 108:176-198. . View in PubMed

New sivaladapid primate from Lower Siwalik deposits surrounding Ramnagar (Jammu and Kashmir State), India J Hum Evol. 2017 01; 102:21-41. . View in PubMed

Adaptation to bipedal gait and fifth metatarsal structural properties in Australopithecus, Paranthropus, and HomoC. R. Palevol. 2017; 16(5-6):585-599. . View in PubMed

The locomotion of Babakotia radofilai inferred from epiphyseal and diaphyseal morphology of the humerus and femur J Morphol. 2016 09; 277(9):1199-218. . View in PubMed

Trabecular architecture in the StW 352 fossil hominin calcaneus J Hum Evol. 2016 08; 97:145-58. . View in PubMed

Morphological diversity in the digital rays of primate handsIn: Kivell TL, Lemelin P, Richmond BG, and Schmitt D (editors), The Evolution of the Primate Hand: Anatomical, Developmental, Functional and Paleontological Evidence. 2016; pp. 55-100. . View in PubMed

An Early Pleistocene human pedal phalanx from Swartkrans, SKX 16699, and the antiquity of the human lateral forefootC. R. Palevol. 2016; 15(8):978–987. . View in PubMed

Distinct functional roles of primate grasping hands and feet during arboreal quadrupedal locomotion J Hum Evol. 2015 Nov; 88:79-84. . View in PubMed

Functional aspects of metatarsal head shape in humans, apes, and Old World monkeys J Hum Evol. 2015 Sep; 86:136-46. . View in PubMed

Mouse hallucal metatarsal cross-sectional geometry in a simulated fine branch niche J Morphol. 2015 Jul; 276(7):759-65. . View in PubMed

Electromyography of crural and pedal muscles in tufted capuchin monkeys (Sapajus apella): Implications for hallucal grasping behavior and first metatarsal morphology in euprimates Am J Phys Anthropol. 2015 Apr; 156(4):553-64. . View in PubMed

Functional morphology of the hallucal metatarsal with implications for inferring grasping ability in extinct primates Am J Phys Anthropol. 2015 Mar; 156(3):327-48. . View in PubMed

Exploring phylogenetic and functional signals in complex morphologies: the hamate of extant anthropoids as a test-case study Anat Rec (Hoboken). 2015 Jan; 298(1):212-29. . View in PubMed

Geometric properties and comparative biomechanics of Homo floresiensis mandibles J Hum Evol. 2014 Mar; 68:36-46. . View in PubMed

New Lower Siwalik localities near Ramnagar, India: implications for the earliest Asian great apes and other mammalian linages Select Publications of the Palaeontological Society of India. 2014; 5:353-365. . View in PubMed

A resampling approach and implications for estimating the phalangeal index from unassociated hand bones in fossil primates Am J Phys Anthropol. 2013 Jun; 151(2):280-9. . View in PubMed

Humeral cross-sectional shape in suspensory primates and sloths Anat Rec (Hoboken). 2013 Apr; 296(4):545-56. . View in PubMed

Joint loads in marsupial ankles reflect habitual bipedalism versus quadrupedalism PLoS One. 2013; 8(3):e58811. . View in PubMed

Cercopithecoid primate postcranial fossils from Cooper’s D, South Africa GeoBios. 2013; 46:381-394. . View in PubMed

Ontogenetic scaling of fore- and hind limb posture in wild chacma baboons (Papio hamadryas ursinus) PLoS One. 2013; 8(7):e71020. . View in PubMed

New primate first metatarsals from the Paleogene of Egypt and the origin of the anthropoid big toe J Hum Evol. 2012 Jul; 63(1):99-120. . View in PubMed

The endocranial petrosal anatomy of Bothriogenys (Mammalia, Artiodactyla, Anthracotheriidae), and petrosal volume and density comparisons among aquatic and terrestrial artiodactylans and outgroups Journal Paleontology. 2012; 86:44-50. . View in PubMed

Electromyography of wrist and finger flexor muscles in olive baboons (Papio anubis) J Exp Biol. 2012 Jan 01; 215(Pt 1):115-23. . View in PubMed

Algorithms to automatically quantify the geometric similarity of anatomical surfaces Proc Natl Acad Sci U S A. 2011 Nov 08; 108(45):18221-6. . View in PubMed

Metatarsal fusion pattern and developmental morphology of the Olduvai Hominid 8 foot: Evidence of adolescence J Hum Evol. 2011 Jan; 60(1):58-69. . View in PubMed

Apparent density of the primate calcaneo-cuboid joint and its association with locomotor mode, foot posture, and the "midtarsal break" Am J Phys Anthropol. 2010 Jun; 142(2):180-93. . View in PubMed

Functional morphology of cercopithecoid primate metacarpals J Hum Evol. 2010 Apr; 58(4):320-37. . View in PubMed

Dynamic pressure patterns in the hands of olive baboons (Papio anubis) during terrestrial locomotion: implications for cercopithecoid primate hand morphology Anat Rec (Hoboken). 2010 Apr; 293(4):710-8. . View in PubMed

The interplay between speed, kinetics, and hand postures during primate terrestrial locomotion Am J Phys Anthropol. 2010 Feb; 141(2):222-34. . View in PubMed

Hallucal grasping in Nycticebus coucang: further implications for the functional significance of a large peroneal process J Hum Evol. 2010 Jan; 58(1):33-42. . View in PubMed

Distal forelimb kinematics in Erythrocebus patas and Papio anubis during walking and galloping International Journal of Primatology. 2010; 31:191-207. . View in PubMed

Terrestrial adaptations in the hands of Equatorius africanus revisited J Hum Evol. 2009 Dec; 57(6):763-72. . View in PubMed

Comparative functional morphology of the primate peroneal process J Hum Evol. 2009 Dec; 57(6):721-31. . View in PubMed

Not so fast: speed effects on forelimb kinematics in cercopithecine monkeys and implications for digitigrade postures in primates Am J Phys Anthropol. 2009 Sep; 140(1):92-112. . View in PubMed

Apparent density patterns in subchondral bone of the sloth and anteater forelimb Biol Lett. 2008 Oct 23; 4(5):486-9. . View in PubMed

Telemetered electromyography of peroneus longus in Varecia variegata and Eulemur rubriventer: implications for the functional significance of a large peroneal process J Hum Evol. 2007 Aug; 53(2):119-34. . View in PubMed

Body mass distribution and gait mechanics in fat-tailed dwarf lemurs (Cheirogaleus medius) and patas monkeys (Erythrocebus patas) J Hum Evol. 2007 Jul; 53(1):26-40. . View in PubMed

Bone density spatial patterns in the distal radius reflect habitual hand postures adopted by quadrupedal primates J Hum Evol. 2007 Feb; 52(2):130-41. . View in PubMed

Cercopithecoid cervical vertebral morphology and implications for the presence of Theropithecus in early Pleistocene Europe J Hum Evol. 2007 Feb; 52(2):113-29. . View in PubMed

Dental metric comparisons of Morotopithecus and Afropithecus: implications for the validity of the genus Morotopithecus J Hum Evol. 2006 Nov; 51(5):506-12. . View in PubMed

Habitual use of the primate forelimb is reflected in the material properties of subchondral bone in the distal radius J Anat. 2006 Jun; 208(6):659-70. . View in PubMed

2005 Apr; 283(2):275-87. . View in PubMed

Modeling masticatory muscle force in finite element analysis: sensitivity analysis using principal coordinates analysis Anat Rec A Discov Mol Cell Evol Biol. 2005 Apr; 283(2):288-99. . View in PubMed

The hominoid proximal radius: re-interpreting locomotor behaviors in early hominins J Hum Evol. 2005 Apr; 48(4):415-32. . View in PubMed

Form and function of the oblique cord (chorda obliqua) in anthropoid primates Primates. 2005 Jan; 46(1):47-57. . View in PubMed

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