Neuroscience 2003 Abstract
| Presentation Number: | 94.10 |
|---|---|
| Abstract Title: | Comparative neuroanatomy of the killer whale (<I>Orcinus orca</I>) and amazon river dolphin (<I>Inia geoffrensis</I>) from magnetic resonance images. |
| Authors: |
Marino, L.*1,2
; Sherwood, C. C.
; Tang, C. Y.
; Delman, B. N.
; Naidich, T. P.
; Johnson, J. I.
; Hof, P. R.
1Neurosci. and Behavioral Biol., Emory Univ, Atlanta, GA 2Living Links Ctr. for Advanced Study of Ape and Human Evolution, Emory Univ, Atlanta, GA |
| Primary Theme and Topics |
Cognition and Behavior - Neuroethology -- Comparative anatomy & evolution |
| Session: |
94. Neuroethology: Comparative Anatomy & Evolution Poster |
| Presentation Time: | Saturday, November 8, 2003 2:00 PM-3:00 PM |
| Location: | Morial Convention Center - Hall F-I, Board # FF1 |
| Keywords: | CETACEA, BRAIN, EVOLUTION, MRI |
Data on comparative neuroanatomy across cetacean (dolphin, porpoise, and whale) species is relatively scarce. Here we present a neuroanatomical study of two odontocete species from different families: the killer whale (Orcinus orca) and the Amazon River dolphin (Inia geoffrensis), from Delphinidae and Platanistidae, respectively. Magnetic Resonance Imaging (MRI) was used to examine adult postmortem brains of these two species. MRI allows visualization of brain structures in normal 3D arrangement without the artifacts associated with histological procedures. Additionally, 3D MRI datasets are compatible with geometric morphometric analyses not possible with histological samples. MR images were acquired on a 1.5 T GE high-gradient MRI scanner equipped with 8.3 software. Axial and coronal T-1 weighted scans were obtained as 2 mm thick contiguous sections with a matrix size of 512 x 512 and an in-plane resolution of 32 x 32 cm yielding a voxel size of 0.63 x 0.63 x 2.0 mm. Axial, coronal, and sagittal T-2 slices were obtained as 2 mm thick contiguous sections with a matrix size of 256 x 256 and an in-plane resolution of 32 x 32 cm yielding a voxel size of 1.25 x 1.25 x 2.0 mm. Data were transferred electronically to eFilm v1.5.3 for offline processing. This method yields high spatial resolution images that can be used to identify structures to “atlas-level” detail, conduct morphometric analyses, and thereby directly compare the brains of these less-well-known species.
Sample Citation:
[Authors]. [Abstract Title]. Program No. XXX.XX. 2003 Neuroscience Meeting Planner. New Orleans, LA: Society for Neuroscience, 2003. Online.
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