Functional and diffusion tensor magnetic resonance imaging of the sheep brain

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 she...

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Bibliographic Details
Published in:BMC veterinary research 2015-10, Vol.11 (1), p.262-262, Article 262
Main Authors: Lee, Wonhye, Lee, Stephanie D, Park, Michael Y, Foley, Lori, Purcell-Estabrook, Erin, Kim, Hyungmin, Yoo, Seung-Schik
Format: Article
Language:English
Subjects:
Animals
Brain - anatomy & histology
Brain - physiology
Brain research
Diffusion Tensor Imaging - veterinary
Female
Functional Neuroimaging - veterinary
Methodology
Methods
Photic Stimulation
Physical Stimulation
Physiological aspects
Sheep - anatomy & histology
Sheep - physiology
Touch Perception - physiology
Visual Perception - physiology
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Summary: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. 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. 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.
ISSN:1746-6148
1746-6148
DOI:10.1186/s12917-015-0581-8