Region of interest template for the human basal ganglia: Comparing EPI and standardized space approaches.

Region of interest template for the human basal ganglia: Comparing EPI and standardized space approaches. Research Abstract Details 

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Region of interest template for the human basal ganglia: Comparing EPI and standardized space approaches. Abstract Text:

Janey Prodoehl,Hong Yu,Deborah M Little,Ivy Abraham,David E Vaillancourt,Janey Prodoehl,Hong Yu,Deborah M Little,Ivy Abraham,David E Vaillancourt,

Identifying task-related activation in the basal ganglia (BG) is an important area of interest in normal motor systems and cognitive neuroscience. The purpose of this study was to compare changes in brain activation in the BG using results obtained from two different masking methods: a mask drawn in standardized space from a T1-weighted anatomical image and individual region of interest (ROI) masks drawn from each subject's echo-planar image (EPI) from different tasks with reference to the high resolution fast spin echo image of each subject. Two standardized masks were used: a mask developed in Talairach space (Basal Ganglia Human Area Template (BGHAT)) and a mask developed in Montreal Neurological Institute space (MNI mask). Ten subjects produced fingertip force pulses in five separate contraction tasks during fMRI scanning. ROIs were the left caudate, putamen, external and internal portions of the globus pallidus, and subthalamic nucleus. ANOVA revealed a similar average number of voxels in the EPI mask across tasks in each BG region. The percent signal change (PSC) was consistent within each region regardless of which mask was used. Linear regression analyses between PSC in BGHAT and EPI masks and MNI and EPI masks yielded r(2) values between 0.74-0.99 and 0.70-0.99 across regions, respectively. In conclusion, PSC in different BG ROIs can be compared across studies using these different masking methods. The masking method used does not affect the overall interpretation of results with respect to the effect of task. Use of a mask drawn in standardized space is a valid and time saving method of identifying PSC in the small nuclei of the BG.

Region of interest template for the human basal ganglia: Comparing EPI and standardized space approaches. Publishing Authors By Initials

J Prodoehl,H Yu,DM Little,I Abraham,DE Vaillancourt,J Prodoehl,H Yu,DM Little,I Abraham,DE Vaillancourt,

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Region of interest template for the human basal ganglia: Comparing EPI and standardized space approaches. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: NeuroImage

VOLUME: 39

Page Numbers: 956-65

Journal Abbreviation: Neuroimage

ISSN: 1053-8119

DAY: 22

MONTH: 09

YEAR: 2007

Region of interest template for the human basal ganglia: Comparing EPI and standardized space approaches. Information

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LANGUAGE: eng

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AFFILIATION: Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612, USA.

Country: United States

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MEDLINETA: Neuroimage

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