Functional and diffusion tensor magnetic resonance imaging of the sheep brain

Title
Functional and diffusion tensor magnetic resonance imaging of the sheep brain
Authors
Wonhye LeeStephanie D LeeMichael Y ParkLori FoleyErin Purcell-Estabrook김형민Seung-Schik Yoo
Keywords
Sheep; Sensorimotor; Visual; fMRI; DTI; Tractography
Issue Date
2015-10
Publisher
BMC veterinary research
Citation
VOL 11, NO 1, 262
Abstract
Background: An ovine model can cast great insight in translational neuroscientific research due to its large brain volume and distinct regional neuroanatomical structures. The present study examined the applicability of brain functional magnetic resonance imaging (fMRI) and diffusion tensor imaging (DTI) to sheep using a clinical MR scanner (3 tesla) with a head coil. The blood-oxygenation-level-dependent (BOLD) fMRI was performed on anesthetized sheep during the block-based presentation of external tactile and visual stimuli using gradient echo-planar-imaging (EPI) sequence. Results: The individual as well as group-based data processing subsequently showed activation in the eloquent sensorimotor and visual areas. DTI was acquired using 26 differential magnetic gradient directions to derive directional fractional anisotropy (FA) and apparent diffusion coefficient (ADC) values from the brain. White matter tractography was also applied to reveal the macrostructure of the corticospinal tracts and optic radiations. Conclusions: Utilization of fMRI and DTI along with anatomical MRI in the sheep brain could shed light on a broader use of an ovine model in the field of translational neuroscientific research targeting the brain.
URI
http://pubs.kist.re.kr/handle/201004/50513
ISSN
17466148
Appears in Collections:
KIST Publication > Article
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