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Social and Behavioral Sciences Commons™
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Articles 1 - 4 of 4
Full-Text Articles in Social and Behavioral Sciences
Tractography Of The Spider Monkey (Ateles Geoffroyi) Corpus Callosum Using Diffusion Tensor Magnetic Resonance Imaging, D. Platas-Neri, S. Hidalgo-Tobón, B. De Celis Alonso, F. C-P De León, J. Muñoz-Delgado, Kimberley A. Phillips
Tractography Of The Spider Monkey (Ateles Geoffroyi) Corpus Callosum Using Diffusion Tensor Magnetic Resonance Imaging, D. Platas-Neri, S. Hidalgo-Tobón, B. De Celis Alonso, F. C-P De León, J. Muñoz-Delgado, Kimberley A. Phillips
Psychology Faculty Research
The objective of this research was to describe the organization, connectivity and microstructure of the corpus callosum of the spider monkey (Ateles geoffroyi). Non-invasive magnetic resonance imaging and diffusion-tensor imaging were obtained from three subjects using a 3T Philips scanner. We hypothesized that the arrangement of fibers in spider monkeys would be similar to that observed in other non-human primates. A repeated measure (n = 3) of fractional anisotropy values was obtained of each subject and for each callosal subdivision. Measurements of the diffusion properties of corpus callosum fibers exhibited a similar pattern to those reported in the …
Multi-Region Hemispheric Specialization Differentiates Human From Nonhuman Primate Brain Function, H-Y. Wey, Kimberley A. Phillips, D. R. Mckay, A. R. Laird, P. Kochunov, M. D. Davis, D. C. Glahn, T. Q. Duong, P. T. Fox
Multi-Region Hemispheric Specialization Differentiates Human From Nonhuman Primate Brain Function, H-Y. Wey, Kimberley A. Phillips, D. R. Mckay, A. R. Laird, P. Kochunov, M. D. Davis, D. C. Glahn, T. Q. Duong, P. T. Fox
Psychology Faculty Research
The human behavioral repertoire greatly exceeds that of nonhuman primates. Anatomical specializations of the human brain include an enlarged neocortex and prefrontal cortex (Semendeferi et al. in Am J Phys Anthropol 114:224–241, 2001), but regional enlargements alone cannot account for these vast functional differences. Hemispheric specialization has long believed to be a major contributing factor to such distinctive human characteristics as motor dominance, attentional control and language. Yet structural cerebral asymmetries, documented in both humans and some nonhuman primate species, are relatively minor compared to behavioral lateralization. Identifying the mechanisms that underlie these functional differences remains a goal of considerable …
Topography Of The Chimpanzee Corpus Callosum, Kimberley A. Phillips, William D. Hopkins
Topography Of The Chimpanzee Corpus Callosum, Kimberley A. Phillips, William D. Hopkins
Psychology Faculty Research
The corpus callosum (CC) is the largest commissural white matter tract in mammalian brains, connecting homotopic and heterotopic regions of the cerebral cortex. Knowledge of the distribution of callosal fibers projecting into specific cortical regions has important implications for understanding the evolution of lateralized structures and functions of the cerebral cortex. No comparisons of CC topography in humans and great apes have yet been conducted. We investigated the topography of the CC in 21 chimpanzees using high-resolution magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI). Tractography was conducted based on fiber assignment by continuous tracking (FACT) algorithm. We expected …
Evolution Of The Cerebellar Cortex: The Selective Expansion Of Prefrontal-Projecting Cerebellar Lobules, J. H. Balsters, E. Cussans, J. Diedrichsen, Kimberley A. Phillips, T. M. Preuss, J. K. Rilling, N. Ramnani
Evolution Of The Cerebellar Cortex: The Selective Expansion Of Prefrontal-Projecting Cerebellar Lobules, J. H. Balsters, E. Cussans, J. Diedrichsen, Kimberley A. Phillips, T. M. Preuss, J. K. Rilling, N. Ramnani
Psychology Faculty Research
It has been suggested that interconnected brain areas evolve in tandem because evolutionary pressures act on complete functional systems rather than on individual brain areas. The cerebellar cortex has reciprocal connections with both the prefrontal cortex and motor cortex, forming independent loops with each. Specifically, in capuchin monkeys cerebellar cortical lobules Crus I and Crus II connect with prefrontal cortex, whereas the primary motor cortex connects with cerebellar lobules V, VI, VIIb, and VIIIa. Comparisons of extant primate species suggest that the prefrontal cortex has expanded more than cortical motor areas in human evolution. Given the enlargement of the prefrontal …