Abstract # 72:

Scheduled for Saturday, September 13, 2014 07:00 PM-09:00 PM: Session 11 (Decatur B) Poster Presentation


TRACTOGRAPHY OF THE SPIDER MONKEY CORPUS CALLOSUM (ATELES GEOFFROYI) USING DIFFUSION TENSOR MAGNETIC RESONANCE IMAGING.

D. A. Platas-Neri1 and K. A. Phillips2
1Universidad Autónoma del Estado de Morelos, Campus Sur, Jojutla Morelos 62900, Mexico, 2Trinity University, San Antonio, Texas, USA.
line
     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 literature for humans and chimpanzees. No statistical difference was reached when comparing this parameter between the different CC regions (p=0.066). The highest fractional anisotropy values corresponded to regions projecting from the corpus callosum to the posterior cortical association areas, premotor and supplementary motor cortices. The lowest fractional anisotropy corresponded to projections to motor and sensory cortical areas. Analyses indicated that approximately 57% of the fibers projects to the frontal cortex and 43% to the post-central cortex. While this study had a small sample size, the results provided important information concerning the organization of the corpus callosum in spider monkeys.