Timothy M Ryan

Summary

Affiliation: Pennsylvania State University
Country: USA

Publications

  1. pmc Trabecular bone microstructure scales allometrically in the primate humerus and femur
    Timothy M Ryan
    Department of Anthropology, Pennsylvania State University, University Park, PA 16802, USA
    Proc Biol Sci 280:20130172. 2013
  2. pmc Evolution of locomotion in Anthropoidea: the semicircular canal evidence
    Timothy M Ryan
    Department of Anthropology and Center for Quantitative Imaging, EMS Energy Institute, Pennsylvania State University, University Park, PA 16802, USA
    Proc Biol Sci 279:3467-75. 2012
  3. pmc Unique suites of trabecular bone features characterize locomotor behavior in human and non-human anthropoid primates
    Timothy M Ryan
    Department of Anthropology, Pennsylvania State University, University Park, Pennsylvania, United States of America
    PLoS ONE 7:e41037. 2012
  4. doi request reprint Trabecular bone structure in the mandibular condyles of gouging and nongouging platyrrhine primates
    Timothy M Ryan
    Department of Anthropology and Center for Quantitative Imaging, Pennsylvania State University, University Park, Pennsylvania 16802, USA
    Am J Phys Anthropol 141:583-93. 2010
  5. doi request reprint Trabecular bone structure in the humeral and femoral heads of anthropoid primates
    Timothy M Ryan
    Department of Anthropology, Pennsylvania State University, University Park, PA 16802, USA
    Anat Rec (Hoboken) 293:719-29. 2010
  6. ncbi request reprint Trabecular bone ontogeny in the human proximal femur
    Timothy M Ryan
    Department of Anthropology and Center for Quantitative Imaging, Pennsylvania State University, University Park, PA 16802, USA
    J Hum Evol 51:591-602. 2006
  7. ncbi request reprint Angular orientation of trabecular bone in the femoral head and its relationship to hip joint loads in leaping primates
    Timothy M Ryan
    Department of Anthropology and Center for Quantitative Imaging, Pennsylvania State University, University Park, PA 16802, USA
    J Morphol 265:249-63. 2005
  8. ncbi request reprint Mechanical significance of femoral head trabecular bone structure in Loris and Galago evaluated using micromechanical finite element models
    Timothy M Ryan
    Department of Anthropology and Center for Quantitative Imaging, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
    Am J Phys Anthropol 126:82-96. 2005
  9. ncbi request reprint The three-dimensional structure of trabecular bone in the femoral head of strepsirrhine primates
    Timothy M Ryan
    Department of Anthropology, The University of Texas at Austin, Austin, Texas 78712, USA
    J Hum Evol 43:1-26. 2002
  10. doi request reprint Does skeletal anatomy reflect adaptation to locomotor patterns? Cortical and trabecular architecture in human and nonhuman anthropoids
    Colin N Shaw
    Department of Anthropology, The Pennsylvania State University, University Park, PA 16802, USA
    Am J Phys Anthropol 147:187-200. 2012

Detail Information

Publications18

  1. pmc Trabecular bone microstructure scales allometrically in the primate humerus and femur
    Timothy M Ryan
    Department of Anthropology, Pennsylvania State University, University Park, PA 16802, USA
    Proc Biol Sci 280:20130172. 2013
    ....
  2. pmc Evolution of locomotion in Anthropoidea: the semicircular canal evidence
    Timothy M Ryan
    Department of Anthropology and Center for Quantitative Imaging, EMS Energy Institute, Pennsylvania State University, University Park, PA 16802, USA
    Proc Biol Sci 279:3467-75. 2012
    ..The latter scenario would indicate that hominoids of the later Miocene secondarily derived their relatively slow locomotor repertoires...
  3. pmc Unique suites of trabecular bone features characterize locomotor behavior in human and non-human anthropoid primates
    Timothy M Ryan
    Department of Anthropology, Pennsylvania State University, University Park, Pennsylvania, United States of America
    PLoS ONE 7:e41037. 2012
    ..The application of this multivariate approach to analyses of trabecular bone morphology in recent and fossil primates may enhance our ability to reconstruct locomotor behavior in the fossil record...
  4. doi request reprint Trabecular bone structure in the mandibular condyles of gouging and nongouging platyrrhine primates
    Timothy M Ryan
    Department of Anthropology and Center for Quantitative Imaging, Pennsylvania State University, University Park, Pennsylvania 16802, USA
    Am J Phys Anthropol 141:583-93. 2010
    ..Alternatively, the similarities in trabecular architecture across these three taxa may indicate that trabecular bone is relatively unimportant mechanically in the condyle of these primates and therefore is functionally uninformative...
  5. doi request reprint Trabecular bone structure in the humeral and femoral heads of anthropoid primates
    Timothy M Ryan
    Department of Anthropology, Pennsylvania State University, University Park, PA 16802, USA
    Anat Rec (Hoboken) 293:719-29. 2010
    ..The results indicate broad similarity in trabecular bone structure in these bones across anthropoids...
  6. ncbi request reprint Trabecular bone ontogeny in the human proximal femur
    Timothy M Ryan
    Department of Anthropology and Center for Quantitative Imaging, Pennsylvania State University, University Park, PA 16802, USA
    J Hum Evol 51:591-602. 2006
    ..These results suggest that trabecular structure in the proximal femur reflects the shift in external loading patterns associated with the initiation of unassisted walking in infants...
  7. ncbi request reprint Angular orientation of trabecular bone in the femoral head and its relationship to hip joint loads in leaping primates
    Timothy M Ryan
    Department of Anthropology and Center for Quantitative Imaging, Pennsylvania State University, University Park, PA 16802, USA
    J Morphol 265:249-63. 2005
    ..nonleaping taxa. These results further suggest a relationship between bone microstructure in the hip joint and locomotor behavior and indicate a similarity of loading across leapers despite differences in kinematics and phylogeny...
  8. ncbi request reprint Mechanical significance of femoral head trabecular bone structure in Loris and Galago evaluated using micromechanical finite element models
    Timothy M Ryan
    Department of Anthropology and Center for Quantitative Imaging, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
    Am J Phys Anthropol 126:82-96. 2005
    ..The finite element method represents a unique and useful tool for analyzing the functional adaptation of trabecular bone in a diversity of animals and for reconstructing locomotor behavior in extinct taxa...
  9. ncbi request reprint The three-dimensional structure of trabecular bone in the femoral head of strepsirrhine primates
    Timothy M Ryan
    Department of Anthropology, The University of Texas at Austin, Austin, Texas 78712, USA
    J Hum Evol 43:1-26. 2002
    ..The differences in femoral head trabecular structure among these taxa seem to be related to locomotor behavioral differences, reflecting variation in the use and loading of the hip joint during normal locomotion...
  10. doi request reprint Does skeletal anatomy reflect adaptation to locomotor patterns? Cortical and trabecular architecture in human and nonhuman anthropoids
    Colin N Shaw
    Department of Anthropology, The Pennsylvania State University, University Park, PA 16802, USA
    Am J Phys Anthropol 147:187-200. 2012
    ....
  11. ncbi request reprint Femoral head trabecular bone structure in two omomyid primates
    Timothy M Ryan
    Department of Anthropology, The University of Texas at Austin, 78712, USA
    J Hum Evol 43:241-63. 2002
    ....
  12. pmc Analysis of intraindividual and intraspecific variation in semicircular canal dimensions using high-resolution x-ray computed tomography
    Kelli L Welker
    Department of Anthropology, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
    J Anat 215:444-51. 2009
    ..Pearson product moment correlation analyses demonstrated that there was no significant correlation between canal size and body mass in this sample...
  13. doi request reprint Development of cortical bone geometry in the human femoral and tibial diaphysis
    James H Gosman
    Department of Anthropology, The Ohio State University, Columbus, OH 43210, USA
    Anat Rec (Hoboken) 296:774-87. 2013
    ..Two time periods of accelerated change are identified: early childhood and prepuberty/adolescence...
  14. ncbi request reprint Microstructure of trabecular bone in a mouse model for Down syndrome
    Trish Parsons
    Department of Anthropology, Pennsylvania State University, University Park, Pennsylvania 16802, USA
    Anat Rec (Hoboken) 290:414-21. 2007
    ..These differences may contribute to the observed dysmorphology of skull and postcranial skeletal phenotypes in DS...
  15. ncbi request reprint Preliminary observations on the calcaneal trabecular microarchitecture of extant large-bodied hominoids
    Murat Maga
    Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, Texas 78712, USA
    Am J Phys Anthropol 129:410-7. 2006
    ..We also present a new visualization technique that summarizes the trabecular network orientation, and makes it more readily interpretable than the summary statistics of the underlying fabric tensor of the orientation matrix...
  16. pmc The primate semicircular canal system and locomotion
    Fred Spoor
    Department of Anatomy and Developmental Biology, University College London, Gower Street, London WC1E 6BT, United Kingdom
    Proc Natl Acad Sci U S A 104:10808-12. 2007
    ..Primate and other mammalian species studied here that are agile and have fast, jerky locomotion have significantly larger canals relative to body mass than those that move more cautiously...
  17. pmc Additional remains of Wadilemur elegans, a primitive stem galagid from the late Eocene of Egypt
    Erik R Seiffert
    Department of Earth Sciences, University of Oxford, and Oxford University Museum of Natural History, Parks Road, Oxford OX1 3PR, United Kingdom
    Proc Natl Acad Sci U S A 102:11396-401. 2005
    ....
  18. doi request reprint The primate subarcuate fossa and its relationship to the semicircular canals part II: adult interspecific variation
    Nathan Jeffery
    Department of Human Anatomy and Cell Biology, University of Liverpool, Ashton Street, Liverpool L69 3GE, UK
    J Hum Evol 55:326-39. 2008
    ..The findings show that the most reliable functional signals pertaining to locomotion in species that possess a patent subarcuate fossa are likely to come from the lateral canal and are least likely to come from the anterior canal...