Callum F. Ross

Research Summary
My lab researches the motor control and biomechanics of feeding system. My lab uses electromyography and fluoromicrometry to study feeding muscle function, high speed biplanar videofluoroscopy to study 3d tongue and jaw kinematics, and finite element modelling to study mandible mechanics. We study diverse taxa. My lab is working on understanding how both the jaw and tongue are moved and controlled during oral behaviors such as drinking, chewing and swallowing. Dr. Nicho Hatsopoulos and my lab use neural recording techniques to study the role of motor and sensory cortex in control of oral behaviors including chewing and swallowing. We are researching neural encoding of jaw and tongue movements, neuroplasticity associated with learning new oral skills, and, with Dr. Fritzie Arce-McShane, the role of different oral sensory pathways in control of jaw and tongue movement. My lab and Dr. Zeray Alemseged are using finite-element models of primate jaws to study mandible design in humans, great apes, and fossil hominids. Dr. Russell Reid in the Department of Surgery and my lab are working with Drs. Olga Panagiotopoulou in Australia and Felippe Prado in Brazil on bioengineering of human jaw function during distraction osteogenesis and fracture repair.
Biosciences Graduate Program Association
  1. Sagittal suture strain in capuchin monkeys (Sapajus and Cebus) during feeding. Am J Biol Anthropol. 2023 Apr; 180(4):633-654. View in: PubMed

  2. Does the model reflect the system? When two-dimensional biomechanics is not 'good enough'. J R Soc Interface. 2023 01; 20(198):20220536. View in: PubMed

  3. Macaca mulatta is a good model for human mandibular fixation research. R Soc Open Sci. 2022 Nov; 9(11):220438. View in: PubMed

  4. Suction feeding of West African lungfish (Protopterus annectens): An XROMM analysis of jaw mechanics, cranial kinesis, and hyoid mobility. Biol Open. 2022 09 15; 11(9). View in: PubMed

  5. Got rhythm? Rhythmicity differences reflect different optimality criteria in feeding and locomotor systems. Evolution. 2022 Sep; 76(9):2181-2190. View in: PubMed

  6. Iyuku raathi, a new iguanodontian dinosaur from the Early Cretaceous Kirkwood Formation, South Africa. Anat Rec (Hoboken). 2022 Jul 21. View in: PubMed

  7. Mechanical compensation in the evolution of the early hominin feeding apparatus. Proc Biol Sci. 2022 06 08; 289(1976):20220711. View in: PubMed

  8. Loss of oral sensation impairs feeding performance and consistency of tongue-jaw coordination. J Oral Rehabil. 2022 Aug; 49(8):806-816. View in: PubMed

  9. Fracture Fixation Technique and Chewing Side Impact Jaw Mechanics in Mandible Fracture Repair. JBMR Plus. 2022 Jan; 6(1):e10559. View in: PubMed

  10. Suction feeding biomechanics of Polypterus bichir: investigating linkage mechanisms and the contributions of cranial kinesis to oral cavity volume change. J Exp Biol. 2022 02 01; 225(3). View in: PubMed

  11. Comparative biomechanics of the Pan and Macaca mandibles during mastication: finite element modelling of loading, deformation and strain regimes. Interface Focus. 2021 Oct 06; 11(5):20210031. View in: PubMed

  12. Twist and chew: three-dimensional tongue kinematics during chewing in macaque primates. Biol Lett. 2021 12; 17(12):20210431. View in: PubMed

  13. Morphological disparity and evolutionary transformations in the primate hyoid apparatus. J Hum Evol. 2022 01; 162:103094. View in: PubMed

  14. Grit your teeth and chew your food: Implications of food material properties and abrasives for rates of dental microwear formation in laboratory Sapajus apella (Primates). Palaeogeogr Palaeoclimatol Palaeoecol. 2021 Dec 01; 583. View in: PubMed

  15. Integrating XMALab and DeepLabCut for high-throughput XROMM. J Exp Biol. 2020 Jan 01. View in: PubMed

  16. Comparative cranial biomechanics in two lizard species: impact of variation in cranial design. J Exp Biol. 2021 03 11; 224(Pt 5). View in: PubMed

  17. Ingestive behaviors in bearded capuchins (Sapajus libidinosus). Sci Rep. 2020 11 30; 10(1):20850. View in: PubMed

  18. Biomechanical and morphological analysis of Pierre Robin sequence mandible: Finite element and morphometric study. Anat Rec (Hoboken). 2021 07; 304(7):1375-1388. View in: PubMed

  19. Biomechanics of the mandible of Macaca mulatta during the power stroke of mastication: Loading, deformation, and strain regimes and the impact of food type. J Hum Evol. 2020 10; 147:102865. View in: PubMed

  20. Differences in muscle mechanics underlie divergent optimality criteria between feeding and locomotor systems. J Anat. 2020 12; 237(6):1072-1086. View in: PubMed

  21. Integrating XMALab and DeepLabCut for high-throughput XROMM. J Exp Biol. 2020 09 04; 223(Pt 17). View in: PubMed

  22. Teaching anatomy with dissection in the time of COVID-19 is essential and possible. Clin Anat. 2021 11; 34(8):1135-1136. View in: PubMed

  23. XROMM and diceCT reveal a hydraulic mechanism of tongue base retraction in swallowing. Sci Rep. 2020 05 19; 10(1):8215. View in: PubMed

  24. Muscle architecture dynamics modulate performance of the superficial anterior temporalis muscle during chewing in capuchins. Sci Rep. 2020 04 14; 10(1):6410. View in: PubMed

  25. Craniodental allometry and heterochrony in two howler monkeys: Alouatta seniculus and A. palliata. Am J Primatol. 1994; 33(4):277-299. View in: PubMed

  26. The dental microwear of hard-object feeding in laboratory Sapajus apella and its implications for dental microwear formation. Am J Phys Anthropol. 2020 03; 171(3):439-455. View in: PubMed

  27. Adaptive explanation for the origins of the anthropoidea (primates). Am J Primatol. 1996; 40(3):205-230. View in: PubMed

  28. Jaw kinematics and mandibular morphology in humans. J Hum Evol. 2020 02; 139:102639. View in: PubMed

  29. Jaw Elevator Muscle Coordination during Rhythmic Mastication in Primates: Are Triplets Units of Motor Control? Brain Behav Evol. 2020; 95(1):1-14. View in: PubMed

  30. Variation in limb loading magnitude and timing in tetrapods. J Exp Biol. 2020 01 27; 223(Pt 2). View in: PubMed

  31. The Mechanical Effect of the Periodontal Ligament on Bone Strain Regimes in a Validated Finite Element Model of a Macaque Mandible. Front Bioeng Biotechnol. 2019; 7:269. View in: PubMed

  32. Taking a big bite: Working together to better understand the evolution of feeding in primates. Am J Primatol. 2019 05; 81(5):e22981. View in: PubMed

  33. Joint angular excursions during cyclical behaviors differ between tetrapod feeding and locomotor systems. J Exp Biol. 2019 04 30; 222(Pt 9). View in: PubMed

  34. Inter-stride variability triggers gait transitions in mammals and birds. Proc Biol Sci. 2018 Dec 19; 285(1893):20181766. View in: PubMed

  35. Dynamics of motor cortical activity during naturalistic feeding behavior. J Neural Eng. 2019 04; 16(2):026038. View in: PubMed

  36. Bite force and cranial bone strain in four species of lizards. J Exp Biol. 2018 12 04; 221(Pt 23). View in: PubMed

  37. Primary sensorimotor cortex exhibits complex dependencies of spike-field coherence on neuronal firing rates, field power, and behavior. J Neurophysiol. 2018 07 01; 120(1):226-238. View in: PubMed

  38. 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. Anat Rec (Hoboken). 2018 02; 301(2):325-342. View in: PubMed

  39. Dynamic Musculoskeletal Functional Morphology: Integrating diceCT and XROMM. Anat Rec (Hoboken). 2018 02; 301(2):378-406. View in: PubMed

  40. Evaluating the triplet hypothesis during rhythmic mastication in primates. J Exp Biol. 2018 01 16; 221(Pt 2). View in: PubMed

  41. In vivo bone strain and finite element modeling of a rhesus macaque mandible during mastication. Zoology (Jena). 2017 10; 124:13-29. View in: PubMed

  42. Functional correlates of the position of the axis of rotation of the mandible during chewing in non-human primates. Zoology (Jena). 2017 10; 124:106-118. View in: PubMed

  43. Sagittal Plane Kinematics of the Jaw and Hyolingual Apparatus During Swallowing in Macaca mulatta. Dysphagia. 2017 10; 32(5):663-677. View in: PubMed

  44. Scaling of rotational inertia of primate mandibles. J Hum Evol. 2017 05; 106:119-132. View in: PubMed

  45. The Biomechanics of Bony Facial "Buttresses" in South African Australopiths: An Experimental Study Using Finite Element Analysis. Anat Rec (Hoboken). 2017 01; 300(1):171-195. View in: PubMed

  46. Review of In Vivo Bone Strain Studies and Finite Element Models of the Zygomatic Complex in Humans and Nonhuman Primates: Implications for Clinical Research and Practice. Anat Rec (Hoboken). 2016 12; 299(12):1753-1778. View in: PubMed

  47. Internal Bone Architecture in the Zygoma of Human and Pan. Anat Rec (Hoboken). 2016 12; 299(12):1704-1717. View in: PubMed

  48. Elastic Properties of Chimpanzee Craniofacial Cortical Bone. Anat Rec (Hoboken). 2016 12; 299(12):1718-1733. View in: PubMed

  49. In?vivo bone strain in the mandibular corpus of Sapajus during a range?of oral food processing behaviors. J Hum Evol. 2016 09; 98:36-65. View in: PubMed

  50. Human feeding biomechanics: performance, variation, and functional constraints. PeerJ. 2016; 4:e2242. View in: PubMed

  51. Similarity in Neuronal Firing Regimes across Mammalian Species. J Neurosci. 2016 05 25; 36(21):5736-47. View in: PubMed

  52. Primary motor and sensory cortical areas communicate via spatiotemporally coordinated networks at multiple frequencies. Proc Natl Acad Sci U S A. 2016 May 03; 113(18):5083-8. View in: PubMed

  53. Mechanical evidence that Australopithecus sediba was limited in its ability to eat hard foods. Nat Commun. 2016 Feb 08; 7:10596. View in: PubMed

  54. Semiautomatic marker tracking of tongue positions captured by videofluoroscopy during primate feeding. Annu Int Conf IEEE Eng Med Biol Soc. 2015; 2015:5347-50. View in: PubMed

  55. Recurrence network analysis of multiple local field potential bands from the orofacial portion of primary motor cortex. Annu Int Conf IEEE Eng Med Biol Soc. 2015; 2015:5343-6. View in: PubMed

  56. Jaw-muscle force and excursion scale with negative allometry in platyrrhine primates. Am J Phys Anthropol. 2015 Oct; 158(2):242-256. View in: PubMed

  57. Bone strain magnitude is correlated with bone strain rate in tetrapods: implications for models of mechanotransduction. Proc Biol Sci. 2015 Jul 07; 282(1810). View in: PubMed

  58. The feeding biomechanics and dietary ecology of Paranthropus boisei. Anat Rec (Hoboken). 2015 Jan; 298(1):145-67. View in: PubMed

  59. Biomechanical implications of intraspecific shape variation in chimpanzee crania: moving toward an integration of geometric morphometrics and finite element analysis. Anat Rec (Hoboken). 2015 Jan; 298(1):122-44. View in: PubMed

  60. What does feeding system morphology tell us about feeding? Evol Anthropol. 2014 May-Jun; 23(3):105-20. View in: PubMed

  61. Modulation dynamics in the orofacial sensorimotor cortex during motor skill acquisition. J Neurosci. 2014 Apr 23; 34(17):5985-97. View in: PubMed

  62. In vivo cranial bone strain and bite force in the agamid lizard Uromastyx geyri. J Exp Biol. 2014 Jun 01; 217(Pt 11):1983-92. View in: PubMed

  63. Physician opinions about an anatomy core curriculum: a case for medical imaging and vertical integration. Anat Sci Educ. 2014 Jul-Aug; 7(4):251-61. View in: PubMed

  64. In vivo bone strain and finite element modeling of the mandible of Alligator mississippiensis. J Anat. 2013 Sep; 223(3):195-227. View in: PubMed

  65. Viewpoints: diet and dietary adaptations in early hominins: the hard food perspective. Am J Phys Anthropol. 2013 Jul; 151(3):339-55. View in: PubMed

  66. Directional information from neuronal ensembles in the primate orofacial sensorimotor cortex. J Neurophysiol. 2013 Sep; 110(6):1357-69. View in: PubMed

  67. The evolution of locomotor rhythmicity in tetrapods. Evolution. 2013 Apr; 67(4):1209-17. View in: PubMed

  68. Granger causality analysis of functional connectivity of spiking neurons in orofacial motor cortex during chewing and swallowing. Annu Int Conf IEEE Eng Med Biol Soc. 2012; 2012:4587-90. View in: PubMed

  69. Direct correlation of radiologic and cadaveric structures in a gross anatomy course. Med Teach. 2012; 34(12):e779-84. View in: PubMed

  70. Fossil papio cranium from !Ncumtsa (Koanaka) Hills, western Ngamiland, Botswana. Am J Phys Anthropol. 2012 Sep; 149(1):1-17. View in: PubMed

  71. Improved understanding of human anatomy through self-guided radiological anatomy modules. Acad Radiol. 2012 Jul; 19(7):902-7. View in: PubMed

  72. Probabilistic finite element analysis of a craniofacial finite element model. J Theor Biol. 2012 May 07; 300:242-53. View in: PubMed

  73. The role of the sutures in biomechanical dynamic simulation of a macaque cranial finite element model: implications for the evolution of craniofacial form. Anat Rec (Hoboken). 2012 Feb; 295(2):278-88. View in: PubMed

  74. Microwear, mechanics and the feeding adaptations of Australopithecus africanus. J Hum Evol. 2012 Jan; 62(1):165-8. View in: PubMed

  75. Sources of variance in temporal and spatial aspects of jaw kinematics in two species of primates feeding on foods of different properties. Integr Comp Biol. 2011 Aug; 51(2):307-19. View in: PubMed

  76. Evolution of muscle activity patterns driving motions of the jaw and hyoid during chewing in Gnathostomes. Integr Comp Biol. 2011 Aug; 51(2):235-46. View in: PubMed

  77. Modulation of intra-oral processing in mammals and lepidosaurs. Integr Comp Biol. 2007 Jul; 47(1):118-36. View in: PubMed

  78. The evolution of cranial design and performance in squamates: Consequences of skull-bone reduction on feeding behavior. Integr Comp Biol. 2007 Jul; 47(1):107-17. View in: PubMed

  79. Electromyography and the evolution of motor control: limitations and insights. Integr Comp Biol. 2008 Aug; 48(2):261-71. View in: PubMed

  80. The instantaneous center of rotation of the mandible in nonhuman primates. Integr Comp Biol. 2011 Aug; 51(2):320-32. View in: PubMed

  81. The effects of modeling simplifications on craniofacial finite element models: the alveoli (tooth sockets) and periodontal ligaments. J Biomech. 2011 Jul 07; 44(10):1831-8. View in: PubMed

  82. Free body analysis, beam mechanics, and finite element modeling of the mandible of Alligator mississippiensis. J Morphol. 2011 Aug; 272(8):910-37. View in: PubMed

  83. A finite element analysis of masticatory stress hypotheses. Am J Phys Anthropol. 2011 May; 145(1):1-10. View in: PubMed

  84. In vivo bone strain and finite-element modeling of the craniofacial haft in catarrhine primates. J Anat. 2011 Jan; 218(1):112-41. View in: PubMed

  85. The impact of bone and suture material properties on mandibular function in Alligator mississippiensis: testing theoretical phenotypes with finite element analysis. J Anat. 2011 Jan; 218(1):59-74. View in: PubMed

  86. The influence of food material properties on jaw kinematics in the primate, Cebus. Arch Oral Biol. 2010 Dec; 55(12):946-62. View in: PubMed

  87. Rhythmic chewing with oral jaws in teleost fishes: a comparison with amniotes. J Exp Biol. 2010 Jun 01; 213(11):1868-75. View in: PubMed

  88. Effects of brain and facial size on basicranial form in human and primate evolution. J Hum Evol. 2010 May; 58(5):424-31. View in: PubMed

  89. The structural rigidity of the cranium of Australopithecus africanus: implications for diet, dietary adaptations, and the allometry of feeding biomechanics. Anat Rec (Hoboken). 2010 Apr; 293(4):583-93. View in: PubMed

  90. Allometry of masticatory loading parameters in mammals. Anat Rec (Hoboken). 2010 Apr; 293(4):557-71. View in: PubMed

  91. Darwinius masillae is a strepsirrhine--a reply to Franzen et al. (2009). J Hum Evol. 2010 Nov; 59(5):567-73; discussion 574-9. View in: PubMed

  92. Chewing variation in lepidosaurs and primates. J Exp Biol. 2010 Feb 15; 213(4):572-84. View in: PubMed

  93. Material properties of mandibular cortical bone in the American alligator, Alligator mississippiensis. Bone. 2010 Mar; 46(3):860-7. View in: PubMed

  94. Ecological consequences of scaling of chew cycle duration and daily feeding time in primates. J Hum Evol. 2009 Jun; 56(6):570-85. View in: PubMed

  95. Influence of visual masking technique on the assessment of 2 red wines by trained and consumer assessors. J Food Sci. 2008 Aug; 73(6):S279-85. View in: PubMed

  96. The feeding biomechanics and dietary ecology of Australopithecus africanus. Proc Natl Acad Sci U S A. 2009 Feb 17; 106(7):2124-9. View in: PubMed

  97. The functional significance of the lower temporal bar in Sphenodon punctatus. J Exp Biol. 2008 Dec; 211(Pt 24):3908-14. View in: PubMed

  98. Scaling of chew cycle duration in primates. Am J Phys Anthropol. 2009 Jan; 138(1):30-44. View in: PubMed

  99. Masticatory biomechanics and its relevance to early hominid phylogeny: an examination of palatal thickness using finite-element analysis. J Hum Evol. 2007 May; 52(5):585-99. View in: PubMed

  100. Modulation of mandibular loading and bite force in mammals during mastication. J Exp Biol. 2007 Mar; 210(Pt 6):1046-63. View in: PubMed

  101. Evolution of eye size and shape in primates. J Hum Evol. 2007 Mar; 52(3):294-313. View in: PubMed

  102. Finite element analysis in vertebrate biomechanics. Anat Rec A Discov Mol Cell Evol Biol. 2005 Apr; 283(2):253-8. View in: PubMed

  103. Finite element analysis in functional morphology. Anat Rec A Discov Mol Cell Evol Biol. 2005 Apr; 283(2):259-74. View in: PubMed

  104. 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

  105. Comparison of beam theory and finite-element analysis with in vivo bone strain data from the alligator cranium. Anat Rec A Discov Mol Cell Evol Biol. 2005 Apr; 283(2):331-48. View in: PubMed

  106. Modeling elastic properties in finite-element analysis: how much precision is needed to produce an accurate model? Anat Rec A Discov Mol Cell Evol Biol. 2005 Apr; 283(2):275-87. View in: PubMed

  107. Temporalis function in anthropoids and strepsirrhines: an EMG study. Am J Phys Anthropol. 2005 Sep; 128(1):35-56. View in: PubMed

  108. Bone strain gradients and optimization in vertebrate skulls. Ann Anat. 2004 Dec; 186(5-6):387-96. View in: PubMed

  109. Primate auditory diversity and its influence on hearing performance. Anat Rec A Discov Mol Cell Evol Biol. 2004 Nov; 281(1):1123-37. View in: PubMed

  110. Evolution of the special senses in primates: past, present, and future. Anat Rec A Discov Mol Cell Evol Biol. 2004 Nov; 281(1):1078-82. View in: PubMed

  111. Curvilinear, geometric and phylogenetic modeling of basicranial flexion: is it adaptive, is it constrained? J Hum Evol. 2004 Feb; 46(2):185-213. View in: PubMed

  112. In vivo function of the craniofacial haft: the interorbital "pillar". Am J Phys Anthropol. 2001 Oct; 116(2):108-39. View in: PubMed

  113. Evolution of activity patterns and chromatic vision in primates: morphometrics, genetics and cladistics. J Hum Evol. 2001 Feb; 40(2):111-49. View in: PubMed

  114. The primate cranial base: ontogeny, function, and integration. Am J Phys Anthropol. 2000; Suppl 31:117-69. View in: PubMed

  115. The petrosal of Omomys carteri and the evolution of the primate basicranium. J Hum Evol. 2000 Aug; 39(2):225-51. View in: PubMed

  116. Symphyseal fusion and jaw-adductor muscle force: an EMG study. Am J Phys Anthropol. 2000 Aug; 112(4):469-92. View in: PubMed

  117. Electromyography of the anterior temporalis and masseter muscles of owl monkeys (Aotus trivirgatus) and the function of the postorbital septum. Am J Phys Anthropol. 2000 Aug; 112(4):455-68. View in: PubMed

  118. Kinematic data on primate head and neck posture: implications for the evolution of basicranial flexion and an evaluation of registration planes used in paleoanthropology. Am J Phys Anthropol. 1999 Feb; 108(2):205-22. View in: PubMed

  119. Mandibular corpus strain in primates: further evidence for a functional link between symphyseal fusion and jaw-adductor muscle force. Am J Phys Anthropol. 1998 Nov; 107(3):257-71. View in: PubMed

  120. In vivo and in vitro bone strain in the owl monkey circumorbital region and the function of the postorbital septum. Am J Phys Anthropol. 1996 Oct; 101(2):183-215. View in: PubMed

  121. Basicranial flexion, relative brain size, and facial kyphosis in nonhuman primates. Am J Phys Anthropol. 1993 Jul; 91(3):305-24. View in: PubMed