title: Intratask and intertask asymmetry analysis of motor function.
abstract: Ample evidence from functional magnetic resonance imaging studies has demonstrated functional brain asymmetries in the motor cortex and cerebellum within the task of finger-to-thumb (intratask), but the asymmetries across left and right hand-performed tasks of finger-to-thumb (intertask) are little known. Here, we found that intratask evoked asymmetry responses in the motor cortex and cerebellum, and interestingly in the Extra-Nuclear and insula. Intertask comparisons between left and right hand-activated images and between the asymmetries of intratasks of left and right hand, however, revealed distinct lateralization responses in the temporal cortex, extranuclear, parahippocampal gyrus, cingulate gyrus and prominently in basal ganglia. These results suggest that multiple aspects of functional asymmetries in motor organization are reflected in specific brain regions.
authors.affiliation: College of Mechatronics and Automation, National University of Defense Technology, Changsha, Hunan, PR China.
authors.forename: Lirong
authors.initials: L
authors.lastname: Yan
authors.forename: Daxing
authors.initials: D
authors.lastname: Wu
authors.forename: Xiang
authors.initials: X
authors.lastname: Wang
authors.forename: Zongtan
authors.initials: Z
authors.lastname: Zhou
authors.forename: Yadong
authors.initials: Y
authors.lastname: Liu
authors.forename: Shuqiao
authors.initials: S
authors.lastname: Yao
authors.forename: Dewen
authors.initials: D
authors.lastname: Hu
mesh_terms: D001921:Brain / Q000033:anatomy & histology / Q000502:physiology*; D001931:Brain Mapping; D004292:Dominance, Cerebral; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009043:Motor Activity / Q000502:physiology*; D012984:Software; D013028:Space Perception / Q000502:physiology*