William D Hopkins

Summary

Affiliation: Emory University
Country: USA

Publications

  1. pmc A cross-setting study of chimpanzee (Pan troglodytes) personality structure and development: zoological parks and Yerkes National Primate Research Center
    Alexander Weiss
    Department of Psychology, The University of Edinburgh, Edinburgh, UK
    Am J Primatol 69:1264-77. 2007
  2. pmc Lateralized changes in tympanic membrane temperature in relation to different cognitive tasks in chimpanzees (Pan troglodytes)
    W D Hopkins
    Division of Psychobiology, Yerkes Regional Primate Research Center, Emory University, Atlanta, Georgia 30322, USA
    Behav Neurosci 112:83-8. 1998
  3. pmc Handedness in chimpanzees (Pan troglodytes) is associated with asymmetries of the primary motor cortex but not with homologous language areas
    William D Hopkins
    Division of Psychobiology, Yerkes National Primate Research Center, Emory University, Atlanta, GA 30322, USA
    Behav Neurosci 118:1176-83. 2004
  4. pmc Individual and setting differences in the hand preferences of chimpanzees (Pan troglodytes): a critical analysis and some alternative explanations
    William D Hopkins
    Berry College, Mount Berry, GA, USA
    Laterality 10:65-80. 2005
  5. pmc Chimpanzees (Pan troglodytes) are predominantly right-handed: replication in three populations of apes
    William D Hopkins
    Division of Psychobiology, Emory University, Yerkes National Primate Research Center, 954 Gatewood Road, Atlanta, GA 30322, USA
    Behav Neurosci 118:659-63. 2004
  6. pmc Chimpanzees are right-handed when recording bouts of hand use
    William D Hopkins
    Yerkes National Primate Research Center, Atlanta Berry College, Mount Berry, GA, USA
    Laterality 10:121-130. 2005
  7. pmc The distribution and development of handedness for manual gestures in captive chimpanzees (Pan troglodytes)
    William D Hopkins
    Division of Psychobiology, Yerkes National Primate Research Center, Emory University, Atlanta, GA 30322, USA
    Psychol Sci 16:487-93. 2005
  8. pmc Factors influencing the prevalence and handedness for throwing in captive chimpanzees (Pan troglodytes)
    William D Hopkins
    Yerkes National Primate Research Center, Emory University, Atlanta, GA 30322, USA
    J Comp Psychol 119:363-70. 2005
  9. pmc Does variation in sample size explain individual differences in hand preferences of chimpanzees (Pan troglodytes)? An empirical study and reply to Palmer (2002)
    William D Hopkins
    Department of Psychology, Berry College, Mount Berry, Georgia 30149, USA
    Am J Phys Anthropol 121:378-81;author reply 382-4. 2003
  10. pmc Grip morphology and hand use in chimpanzees (Pan troglodytes): evidence of a left hemisphere specialization in motor skill
    William D Hopkins
    Division of Psychobiology, Yerkes Regional Primate Research Center, Emory University, Atlanta, Georgia 30322, USA
    J Exp Psychol Gen 131:412-23. 2002

Collaborators

Detail Information

Publications78

  1. pmc A cross-setting study of chimpanzee (Pan troglodytes) personality structure and development: zoological parks and Yerkes National Primate Research Center
    Alexander Weiss
    Department of Psychology, The University of Edinburgh, Edinburgh, UK
    Am J Primatol 69:1264-77. 2007
    ..These findings suggest that, whereas there may be differences in the ease with which ratings are made, personality structure, and development are largely consistent across widely differing settings...
  2. pmc Lateralized changes in tympanic membrane temperature in relation to different cognitive tasks in chimpanzees (Pan troglodytes)
    W D Hopkins
    Division of Psychobiology, Yerkes Regional Primate Research Center, Emory University, Atlanta, Georgia 30322, USA
    Behav Neurosci 112:83-8. 1998
    ....
  3. pmc Handedness in chimpanzees (Pan troglodytes) is associated with asymmetries of the primary motor cortex but not with homologous language areas
    William D Hopkins
    Division of Psychobiology, Yerkes National Primate Research Center, Emory University, Atlanta, GA 30322, USA
    Behav Neurosci 118:1176-83. 2004
    ..The overall results suggest that homologous regions of the motor cortex control hand preferences in humans and apes and that these functions evolved independently of left-hemisphere specialization for language and speech...
  4. pmc Individual and setting differences in the hand preferences of chimpanzees (Pan troglodytes): a critical analysis and some alternative explanations
    William D Hopkins
    Berry College, Mount Berry, GA, USA
    Laterality 10:65-80. 2005
    ....
  5. pmc Chimpanzees (Pan troglodytes) are predominantly right-handed: replication in three populations of apes
    William D Hopkins
    Division of Psychobiology, Emory University, Yerkes National Primate Research Center, 954 Gatewood Road, Atlanta, GA 30322, USA
    Behav Neurosci 118:659-63. 2004
    ..This is the strongest evidence to date that population-level handedness is evident in chimpanzees and is not an artifact of human rearing...
  6. pmc Chimpanzees are right-handed when recording bouts of hand use
    William D Hopkins
    Yerkes National Primate Research Center, Atlanta Berry College, Mount Berry, GA, USA
    Laterality 10:121-130. 2005
    ..These results indicate that chimpanzees are right-handed, even when using a more conservative measure of handedness. Limitations in the use of bouts in handedness assessment are also discussed...
  7. pmc The distribution and development of handedness for manual gestures in captive chimpanzees (Pan troglodytes)
    William D Hopkins
    Division of Psychobiology, Yerkes National Primate Research Center, Emory University, Atlanta, GA 30322, USA
    Psychol Sci 16:487-93. 2005
    ....
  8. pmc Factors influencing the prevalence and handedness for throwing in captive chimpanzees (Pan troglodytes)
    William D Hopkins
    Yerkes National Primate Research Center, Emory University, Atlanta, GA 30322, USA
    J Comp Psychol 119:363-70. 2005
    ..The implications of these findings are discussed in the context of theories relating throwing to the evolution of lateralization for language functions...
  9. pmc Does variation in sample size explain individual differences in hand preferences of chimpanzees (Pan troglodytes)? An empirical study and reply to Palmer (2002)
    William D Hopkins
    Department of Psychology, Berry College, Mount Berry, Georgia 30149, USA
    Am J Phys Anthropol 121:378-81;author reply 382-4. 2003
  10. pmc Grip morphology and hand use in chimpanzees (Pan troglodytes): evidence of a left hemisphere specialization in motor skill
    William D Hopkins
    Division of Psychobiology, Yerkes Regional Primate Research Center, Emory University, Atlanta, Georgia 30322, USA
    J Exp Psychol Gen 131:412-23. 2002
    ..Significantly more errors were made for the left compared with the right hand. The cumulative results indicate that chimpanzees show a left-hemisphere asymmetry in motor skill that is associated with the use of precision grips...
  11. pmc Chimpanzee right-handedness: internal and external validity in the assessment of hand use
    William D Hopkins
    Division of Psychobiology, Yerkes Regional Primate Research Center, Emory University, Atlanta, GA 30322, USA
    Cortex 42:90-3. 2006
  12. pmc Lateralized scratching in chimpanzees (Pan troglodytes): Evidence of a functional asymmetry during arousal
    William D Hopkins
    Division of Psychobiology, Yerkes National Primate Research Center, Atlanta, GA 30322, USA
    Emotion 6:553-9. 2006
    ..For scratching, the chimpanzees showed no hand preference but a significant bias for scratching on the left side of the body. These results support the view that the right hemisphere regulates the autonomic nervous system during arousal...
  13. pmc Parental and perinatal factors influencing the development of handedness in captive chimpanzees
    William D Hopkins
    Division of Psychobiology, Yerkes National Primate Research Center, 954 Gatewood Road, Atlanta, Georgia 30322, USA
    Dev Psychobiol 48:428-35. 2006
    ..Contrary to many theories of the origin of handedness, these results indicate that genetic factors have a significant influence on handedness in chimpanzees...
  14. pmc Asymmetric Broca's area in great apes
    C Cantalupo
    Division of Psychobiology and Living Links Center, Yerkes Regional Primate Research Center, Emory University, Atlanta, Georgia 30322, USA
    Nature 414:505. 2001
    ..Our findings suggest that the neuroanatomical substrates for left-hemisphere dominance in speech production were evident at least five million years ago and are not unique to hominid evolution...
  15. pmc Sylvian fissure asymmetries in nonhuman primates revisited: a comparative mri study
    W D Hopkins
    Division of Psychobiology, Yerkes Regional Primate Research Center, Emory University, Atlanta, GA 30322, USA
    Brain Behav Evol 56:293-9. 2000
    ..These results are consistent with findings reported in apes and, to a lesser extent, monkeys. MRI has excellent potential for comparing neuroanatomy across taxonomic families that will help future investigations...
  16. pmc Chimpanzee (Pan troglodytes) handedness: variability across multiple measures of hand use
    W D Hopkins
    Department of Psychology, Berry College, USA
    J Comp Psychol 114:126-35. 2000
    ..The results are interpreted in the context of several recent studies that proposed theoretical models of handedness in nonhuman primates...
  17. pmc Grip preference, dermatoglyphics, and hand use in captive chimpanzees (Pan troglodytes)
    William D Hopkins
    Division of Psychobiology, Yerkes National Primate Research Center, Atlanta, Georgia 30322, USA
    Am J Phys Anthropol 128:57-62. 2005
    ..The results suggest that fingerprint patterns are associated with individual differences in grasping type in chimpanzees as well as some variation in hand use...
  18. pmc Social learning of a communicative signal in captive chimpanzees
    Jared P Taglialatela
    Department of Biology and Physics, Kennesaw State University, Kennesaw, GA, USA
    Biol Lett 8:498-501. 2012
    ..These data support the hypothesis that social learning plays a role in the acquisition and use of communicative vocal signals in chimpanzees...
  19. pmc Sex differences in asymmetry of the planum parietale in chimpanzees (Pan troglodytes)
    Jared P Taglialatela
    Division of Psychobiology, Yerkes National Primate Research Center, Emory University, 954 Gatewood Road, Atlanta, GA 30329, USA
    Behav Brain Res 184:185-91. 2007
    ..These results support the view that asymmetries in the perisylvian language areas were present in the common ancestor of humans and chimpanzees...
  20. pmc Handedness is associated with asymmetries in gyrification of the cerebral cortex of chimpanzees
    William D Hopkins
    Division of Psychobiology, Yerkes National Primate Research Center, Atlanta, GA 30322, USA
    Cereb Cortex 17:1750-6. 2007
    ..The results indicate that variation in gyrification between hemispheres is associated with functional measures of laterality in chimpanzees...
  21. pmc Cortical sulci asymmetries in chimpanzees and macaques: a new look at an old idea
    Stephanie L Bogart
    Division of Developmental and Cognitive Neuroscience, Yerkes National Primate Research Center, Atlanta, GA 30322, USA
    Neuroimage 61:533-41. 2012
    ..The overall results are discussed within the context of the evolution of higher order cognition and motor functions...
  22. doi request reprint The impact of environment on the comprehension of declarative communication in apes
    Heidi Lyn
    Department of Psychology, Agnes Scott College, 141 E College Ave, Decatur, GA 30030, USA
    Psychol Sci 21:360-5. 2010
    ....
  23. pmc Hand preferences for coordinated bimanual actions in 777 great apes: implications for the evolution of handedness in hominins
    William D Hopkins
    Department of Psychology, Agnes Scott College, 141 E College Avenue, Decatur, GA 30030, USA
    J Hum Evol 60:605-11. 2011
    ....
  24. ncbi request reprint Further evidence of a right hand advantage in motor skill by chimpanzees (Pan troglodytes)
    William D Hopkins
    Division of Psychobiology, Yerkes National Primate Research Center, Emory University, Atlanta, Georgia 30322, USA
    Neuropsychologia 42:990-6. 2004
    ..These results are discussed in the context of a presumed disassociation between hand preference and performance as indicators of cerebral dominance in motor functions...
  25. ncbi request reprint Human assessment of chimpanzee facial asymmetry
    Samuel Fernandez-Carriba
    Emory Autism Center, 1551 Shoup Court, Emory University Atlanta, GA 30322, USA
    Laterality 9:1-17. 2004
    ....
  26. pmc Planum temporale surface area and grey matter asymmetries in chimpanzees (Pan troglodytes): the effect of handedness and comparison with findings in humans
    William D Hopkins
    Department of Psychology, Agnes Scott College, Decatur, GA 30030, USA
    Behav Brain Res 208:436-43. 2010
    ..These results suggest that leftward asymmetries in the PT were present in the common ancestor of chimpanzees and humans...
  27. pmc Neuroanatomical correlates of handedness for tool use in chimpanzees (Pan troglodytes): implication for theories on the evolution of language
    William D Hopkins
    Division of Psychobiology, Yerkes National Primate Research Center, Emory University, Atlanta, GA 30322, USA
    Psychol Sci 18:971-7. 2007
    ..These results suggest that the neural substrates of tool use may have served as a preadaptation for the evolution of language and speech in modern humans...
  28. pmc Volumetric and lateralized differences in selected brain regions of chimpanzees (Pan troglodytes) and bonobos (Pan paniscus)
    William D Hopkins
    Department of Psychology, Agnes Scott College, 141 E College Avenue, Decatur, GA 30030, USA
    Am J Primatol 71:988-97. 2009
    ..The results suggest that the two species of Pan are quite similar neurologically, though some volumetric and lateralized differences may reflect inherent differences in social organization, cognition and motor skills...
  29. pmc Now you see me, now you don't: evidence that chimpanzees understand the role of the eyes in attention
    Autumn B Hostetter
    Department of Psychology, University of Wisconsin Madison, 1202 W Johnson Street, Madison, WI 53706, USA
    Anim Cogn 10:55-62. 2007
    ..There was no effect of age or rearing history. The results suggest that chimpanzees use the presence of the eyes as a cue that their visual gestures will be effective...
  30. pmc Gesture handedness predicts asymmetry in the chimpanzee inferior frontal gyrus
    Jared P Taglialatela
    Division of Psychobiology, Yerkes National Primate Research Center, Emory University, Atlanta, Georgia 30329, USA
    Neuroreport 17:923-7. 2006
    ..These findings are the first to provide a direct link between neuroanatomical asymmetries and the production of lateralized communicative behavior in non-human primates...
  31. pmc The role of socio-communicative rearing environments in the development of social and physical cognition in apes
    Jamie L Russell
    Division of Psychobiology, Yerkes National Primate Research Center, USA
    Dev Sci 14:1459-70. 2011
    ....
  32. ncbi request reprint Are planum temporale and sylvian fissure asymmetries directly related? A MRI study in great apes
    Claudio Cantalupo
    Language Research Center, Georgia State University, Atlanta, GA 30303, USA
    Neuropsychologia 41:1975-81. 2003
    ....
  33. pmc A voxel-based morphometry analysis of white matter asymmetries in chimpanzees (Pan troglodytes)
    William D Hopkins
    Department of Psychology, Agnes Scott College, Decatur, GA 30030, USA
    Brain Behav Evol 76:93-100. 2010
    ..Several of the asymmetries were found in regions corresponding to well-known white matter tracts including the superior longitudinal fasciculus, inferior longitudinal fasciculus and corticospinal tract...
  34. pmc Differential use of attentional and visual communicative signaling by orangutans (Pongo pygmaeus) and gorillas (Gorilla gorilla) in response to the attentional status of a human
    Sarah R Poss
    Division of Psychobiology, Yerkes National Primate Research Center, Atlanta, Georgia 30322, USA
    Am J Primatol 68:978-92. 2006
    ..These results are also similar to previous findings on communicative behaviors in chimpanzees...
  35. pmc The Association between handedness, brain asymmetries, and corpus callosum size in chimpanzees (Pan troglodytes)
    William D Hopkins
    Department of Psychology, Agnes Scott College, Decatur, GA 30030, USA
    Cereb Cortex 17:1757-65. 2007
    ....
  36. pmc Chimpanzee (Pan troglodytes) intentional communication is not contingent upon food
    Jamie L Russell
    Division of Psychobiology, Yerkes National Primate Research Center, Atlanta, GA 30322, USA
    Anim Cogn 8:263-72. 2005
    ..Implications for the referential and intentional nature of chimpanzee communicative signaling are discussed...
  37. pmc Performance asymmetries in tool use are associated with corpus callosum integrity in chimpanzees (Pan troglodytes): a diffusion tensor imaging study
    Kimberley A Phillips
    Department of Psychology, Trinity University, 1 Trinity Place, San Antonio, TX 78212, USA
    Behav Neurosci 127:106-13. 2013
    ..Results indicate that the preferred hand was the most adept hand. Performance asymmetries correlated with fractional anisotropy measures but not area measures of the CC...
  38. pmc Regional and hemispheric variation in cortical thickness in chimpanzees (Pan troglodytes)
    William D Hopkins
    Division on of Developmental and Cognitive Neuroscience, Yerkes National Primate Research Center, Atlanta, GA 30322, USA
    J Neurosci 33:5241-8. 2013
    ..The collective findings are discussed within the context of previous findings in humans and theories on the evolution of cortical organization and lateralization in primates...
  39. pmc Planum temporale asymmetries correlate with corpus callosum axon fiber density in chimpanzees (Pan troglodytes)
    William D Hopkins
    Division of Developmental and Cognitive Neuroscience, Yerkes National Primate Research Center, Atlanta, GA 30322, United States
    Behav Brain Res 234:248-54. 2012
    ..As has been reported in human brains, the findings reported here indicate that individual differences in brain asymmetries are associated with variation in interhemispheric connectivity as manifest in axon fiber density and size...
  40. pmc Sex and handedness effects on corpus callosum morphology in chimpanzees (Pan troglodytes)
    Leslie A Dunham
    Division of Psychobiology, Yerkes National Primate Research Center, Atlanta, GA 30322, USA
    Behav Neurosci 120:1025-32. 2006
    ..The results indicate that lateralized hand use in chimpanzees, as in humans, is associated with variation in CC size...
  41. pmc Cortical representation of lateralized grasping in chimpanzees (Pan troglodytes): a combined MRI and PET study
    William D Hopkins
    Division of Developmental and Cognitive Neuroscience, Yerkes National Primate Research Center, Atlanta, Georgia, United States of America
    PLoS ONE 5:e13383. 2010
    ..These results suggest that neuroanatomical asymmetries in the KNOB likely reflect changes in connectivity in primary motor cortex that are experience dependent in chimpanzees and possibly humans...
  42. pmc Asymmetries in the hippocampus and amygdala of chimpanzees (Pan troglodytes)
    Hani D Freeman
    Division of Psychobiology, Yerkes National Primate Research Center, Atlanta, GA 30322, USA
    Behav Neurosci 118:1460-5. 2004
    ..Several of these findings are consistent with results found in the human literature...
  43. pmc Exploring the relationship between cerebellar asymmetry and handedness in chimpanzees (Pan troglodytes) and capuchins (Cebus apella)
    Kimberley A Phillips
    Department of Psychology, Hiram College, 11715 Garfield Road, Hiram, OH 44234, USA
    Neuropsychologia 45:2333-9. 2007
    ..Cerebellar asymmetries were significantly associated with handedness in capuchins but not chimpanzees, and this effect was most pronounced in right-handed capuchins...
  44. pmc Communicative signaling activates 'Broca's' homolog in chimpanzees
    Jared P Taglialatela
    Yerkes National Primate Research Center, Atlanta, Georgia 30329 Department of Natural Sciences, Clayton State University, Morrow, Georgia 30260, USA
    Curr Biol 18:343-8. 2008
    ....
  45. pmc Comparative assessment of handedness for a coordinated bimanual task in chimpanzees (Pan troglodytes), gorillas (Gorilla gorilla) and orangutans (Pongo pygmaeus)
    William D Hopkins
    Division of Psychobiology, Yerkes National Primate Research Center, Atlanta, GA 30322, USA
    J Comp Psychol 117:302-8. 2003
    ..The gorillas showed a nonsignificant trend toward right-handedness. The results are discussed in terms of possible ecological or biomechanical factors that may influence hand preferences in different ape species...
  46. pmc Different early rearing experiences have long-term effects on cortical organization in captive chimpanzees (Pan troglodytes)
    Stephanie L Bogart
    Neuroscience Institute and the Language Research Center, Georgia State University, USA Division of Developmental and Cognitive Neuroscience, Yerkes National Primate Research Center, USA Department of Anthropology, Lawrence University, USA
    Dev Sci 17:161-74. 2014
    ....
  47. pmc Apes communicate about absent and displaced objects: methodology matters
    Heidi Lyn
    Department of Psychology, University of Southern Mississippi, Gulf Coast 730 East Beach Blvd, Long Beach, MS, 39560, USA
    Anim Cogn 17:85-94. 2014
    ..Comparative studies are of great importance in elucidating the evolution of human cognition; however, greater care must be taken with methodology and interpretation for these studies to accurately reflect species differences. ..
  48. pmc Initiation of joint attention is associated with morphometric variation in the anterior cingulate cortex of chimpanzees (Pan troglodytes)
    William D Hopkins
    Division of Developmental and Cognitive Neuroscience, Yerkes National Primate Research Center, Atlanta, GA, USA
    Am J Primatol 75:441-9. 2013
    ....
  49. ncbi request reprint Asymmetry in facial expression of emotions by chimpanzees
    Samuel Fernandez-Carriba
    Language Research Center, Georgia State University, Atlanta, GA 30034, USA
    Neuropsychologia 40:1523-33. 2002
    ..No effect of expression type (positive versus negative) on facial asymmetry was found. Thus, chimpanzees, like humans and some other nonhuman primates, show a right hemisphere specialization for facial expression of emotions...
  50. doi request reprint The chimpanzee brain shows human-like perisylvian asymmetries in white matter
    Claudio Cantalupo
    Department of Psychology, Clemson University, Clemson, SC 29634, USA
    Eur J Neurosci 30:431-8. 2009
    ....
  51. pmc Gray matter asymmetries in chimpanzees as revealed by voxel-based morphometry
    William D Hopkins
    Department of Psychology, Agnes Scott College, Decatur, Georgia 30030, USA
    Neuroimage 42:491-7. 2008
    ..The results from this VBM analysis support previous reports of hemispheric lateralization in chimpanzees and reinforce the view that asymmetries in the central nervous system are not uniquely human...
  52. pmc Left hemisphere specialization for oro-facial movements of learned vocal signals by captive chimpanzees
    Elizabeth A Reynolds Losin
    Division of Psychobiology, Yerkes National Primate Research Center, Atlanta, Georgia, United States of America
    PLoS ONE 3:e2529. 2008
    ....
  53. ncbi request reprint Referential communication by chimpanzees (Pan troglodytes)
    David A Leavens
    Department of Psychology, University of Georgia, Atlanta, GA, USA
    J Comp Psychol 118:48-57. 2004
    ..The capacity for nonverbal reference may predate the Hominidae-Pongidae split, and the development of nonverbal reference may be independent of human species-specific adaptations for speech...
  54. pmc Maternal age, parity, and reproductive outcome in captive chimpanzees (Pan troglodytes)
    Katherine A Roof
    Division of Psychobiology, Yerkes National Primate Research Center, Atlanta, Georgia 30322, USA
    Am J Primatol 67:199-207. 2005
    ..This study supports research demonstrating reproductive decline and termination in nonhuman primates, and is the first to quantitatively account for this phenomenon in captive female chimpanzees...
  55. pmc Behavioral and neuroanatomical correlates of white matter asymmetries in chimpanzees (Pan troglodytes)
    William D Hopkins
    Division of Psychobiology, Yerkes National Primate Research Center, Emory University, Atlanta, GA 30322, USA
    Eur J Neurosci 25:2565-70. 2007
    ..These findings suggest that chimpanzees show asymmetries in cortical connectivity and these may serve as the foundation for morphological and behavioral laterality in primates, including humans...
  56. pmc Brief communication: Locomotor limb preferences in captive chimpanzees (Pan troglodytes): implications for morphological asymmetries in limb bones
    William D Hopkins
    Department of Psychology, Agnes Scott College, Decatur, GA 30030, USA
    Am J Phys Anthropol 137:113-8. 2008
    ..The results are consistent with previous behavioral studies in captive chimpanzees as well as studies on skeletal asymmetries of the forelimbs of chimpanzees...
  57. pmc Subgenual cingulate cortex and personality in chimpanzees (Pan troglodytes)
    Barbara J Blatchley
    Department of Psychology, Agnes Scott College, Decatur, Georgia 30030, USA
    Cogn Affect Behav Neurosci 10:414-21. 2010
    ..There was also a population-level leftward asymmetry in the SGCC. These results are discussed in terms of current models of SGCC function, which suggest that this area may play a role in the biological foundation of personality...
  58. pmc Extensive Vascular Mineralization in the Brain of a Chimpanzee (Pan troglodytes)
    Fawn R Connor-Stroud
    Division of Animal Resources, Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, USA
    Comp Med 64:224-9. 2014
    ..To our knowledge, mineralization in brain has been reported only once to occur in a chimpanzee, but its chronicity in our case makes it particularly interesting. ..
  59. pmc Personality in chimpanzees (Pan troglodytes): exploring the hierarchical structure and associations with the vasopressin V1A receptor gene
    Robert D Latzman
    Department of Psychology, Georgia State University, Atlanta, Georgia, United States of America
    PLoS ONE 9:e95741. 2014
    ....
  60. pmc Genetic influences on receptive joint attention in chimpanzees (Pan troglodytes)
    William D Hopkins
    1 Neuroscience Institute and Language Research Center, Georgia State University, Atlanta, Georgia 30302 2 Division of Developmental and Cognitive Neuroscience, Yerkes National Primate Research Center, Atlanta, Georgia 30329
    Sci Rep 4:3774. 2014
    ..The collective findings show that AVPR1A polymorphisms are associated with individual differences in performance on a receptive joint attention task in chimpanzees. ..
  61. pmc Are chimpanzees really so poor at understanding imperative pointing? Some new data and an alternative view of canine and ape social cognition
    William D Hopkins
    Neuroscience Institute and Language Research Center, Georgia State University, Atlanta, Georgia, United States of America Division of Developmental and Cognitive Neuroscience, Yerkes National Primate Research Center, Atlanta, Georgia, United States of America
    PLoS ONE 8:e79338. 2013
    ..We further suggest that basic differences in subject sampling, subject recruitment and rearing experiences have resulted in a skewed representation of canine abilities compared to those of monkeys and apes. ..
  62. pmc Vocal learning of a communicative signal in captive chimpanzees, Pan troglodytes
    Jamie L Russell
    Yerkes National Primate Research Center, Atlanta, GA, United States Neuroscience Institute and The Language Research Center, Georgia State University, Atlanta, GA, United States
    Brain Lang 127:520-5. 2013
    ..Chimpanzees possess the ability to acquire the use of a communicative signal via operant conditioning and can generalize the use of this newly acquired signal to appropriate communicative contexts. ..
  63. pmc Independence of data points in the measurement of hand preferences in primates: statistical problem or urban myth?
    William D Hopkins
    Neuroscience Institute and Language Research Center, Georgia State University, Atlanta, GA 30302, USA
    Am J Phys Anthropol 151:151-7. 2013
    ..Several suggestions for improvement in the measurement and statistical determination of individual handedness are offered in the article...
  64. pmc The sound of one-hand clapping: handedness and perisylvian neural correlates of a communicative gesture in chimpanzees
    Adrien Meguerditchian
    Department of Psychology, Research Center in Psychology of Cognition, Language and Emotion, Aix Marseille University, Aix en Provence 13621, France
    Proc Biol Sci 279:1959-66. 2012
    ..The results are consistent with the view that gestural communication in the common ancestor may have been a precursor of language and its cerebral substrates in modern humans...
  65. ncbi request reprint The effect of thought structure on the production of lexical movements
    Autumn B Hostetter
    Berry College, Mount Berry, GA 30149, USA
    Brain Lang 82:22-9. 2002
    ..These data support the theory that lexical movements are integrally related to the speech production process...
  66. pmc Neuroanatomical asymmetries and handedness in chimpanzees (Pan troglodytes): a case for continuity in the evolution of hemispheric specialization
    William D Hopkins
    Neuroscience Institute and Language Research Center, Georgia State University, P O Box 5030, Atlanta, GA 30302, USA
    Ann N Y Acad Sci 1288:17-35. 2013
    ....
  67. pmc Increased morphological asymmetry, evolvability and plasticity in human brain evolution
    Aida Gómez-Robles
    Department of Anthropology, The George Washington University, Washington, DC 20052, USA
    Proc Biol Sci 280:20130575. 2013
    ..We infer that these two characteristics can have a role in human cognitive evolution...
  68. pmc Comparative and familial analysis of handedness in great apes
    William D Hopkins
    Department of Psychology, Berry College and Yerkes National Primate Research Center, Atlanta, GA 30322, USA
    Psychol Bull 132:538-59. 2006
    ..Overall, the proportion of right handedness is lower in great apes compared with humans, and various methodological and theoretical explanations for this discrepancy are discussed...
  69. pmc Matching visual stimuli on the basis of global and local features by chimpanzees (Pan troglodytes) and rhesus monkeys (Macaca mulatta)
    William D Hopkins
    Department of Psychology, Berry College, Mount Berry, GA 30149, USA
    Anim Cogn 5:27-31. 2002
    ..The results suggest that perceptual and attentional mechanisms underlying information-processing strategies may account for differences in learning by primates...
  70. pmc Chimpanzee (Pan troglodytes) precentral corticospinal system asymmetry and handedness: a diffusion magnetic resonance imaging study
    Longchuan Li
    Biomedical Imaging Technology Center, Emory University, Atlanta, Georgia, USA
    PLoS ONE 5:e12886. 2010
    ..Recent studies indicate that chimpanzees also show a population-level right-handed bias, although it is less strong than in humans...
  71. pmc Tauopathy with paired helical filaments in an aged chimpanzee
    Rebecca F Rosen
    Yerkes National Primate Research Center, Emory University, Atlanta, Georgia 30329, USA
    J Comp Neurol 509:259-70. 2008
    ....
  72. pmc Further evidence of an association between handedness and neuroanatomical asymmetries in the primary motor cortex of chimpanzees (Pan troglodytes)
    Marco Dadda
    Department of General Psychology, University of Padova, Via Venezia 8, 35131 Padova, Italy
    Neuropsychologia 44:2582-6. 2006
    ..Moreover, using a continuous scale of measurement rather than discrete classification of handedness, significant associations were found between hand use and asymmetries within the precentral gyrus...
  73. doi request reprint Effects of early adverse experiences on behavioural lateralisation in rhesus monkeys (Macaca mulatta)
    Allyson J Bennett
    Department of Physiology Pharmacology, Wake Forest University School of Medicine, Winston Salem, NC 27157, USA
    Laterality 13:282-92. 2008
    ..These results provide evidence that early rearing experiences significantly influence the development of lateralisation in nonhuman primates...
  74. pmc Histological asymmetries of primary motor cortex predict handedness in chimpanzees (Pan troglodytes)
    Chet C Sherwood
    Department of Anthropology, The George Washington University, 2110 G Street NW, Washington, DC 20052, USA
    J Comp Neurol 503:525-37. 2007
    ..These results suggest that histological asymmetries are related to handedness in chimpanzees, while overall patterns of asymmetry at the population level might differ from humans...
  75. pmc Intentionality as measured in the persistence and elaboration of communication by chimpanzees (Pan troglodytes)
    David A Leavens
    Psychology Department, University of Sussex, Falmer, East Sussex, UK
    Child Dev 76:291-306. 2005
    ..Thus, their communication was about a specific item, demonstrating that both intentionality and nonverbal reference are capacities shared by humans with our nearest living relatives, the great apes...
  76. pmc Hand preferences for unimanual and coordinated bimanual tasks in baboons (Papio anubis)
    Jacques Vauclair
    Research Center in Psychology of Cognition, Language and Emotion, Department of Psychology, University of Provence, 13621 Aix en Provence cedex 1, France
    Brain Res Cogn Brain Res 25:210-6. 2005
    ..These are the first evidences of population-level handedness in baboons and the results are discussed in the context of evolutionary theories of cerebral dominance...
  77. ncbi request reprint Functional asymmetry of emotions in primates: new findings in chimpanzees
    Samuel Fernandez-Carriba
    Language Research Center, Georgia State University, Decatur, GA 30034, USA
    Brain Res Bull 57:561-4. 2002
    ..01). Thus, chimpanzees, like humans and some other non-human primates, show a right hemisphere specialization for facial expression of emotions, which suggests that this functional asymmetry is homologous in all these species...
  78. pmc Wild chimpanzees show population-level handedness for tool use
    Elizabeth V Lonsdorf
    Department of Conservation and Science, Lincoln Park Zoo, Chicago, IL 60614, USA
    Proc Natl Acad Sci U S A 102:12634-8. 2005
    ....