Tzu-chen Yeh1, Zong-Kai Hsu2, Sue-Jin Lin2, Chou-Ming Cheng1, Jen-Chuen Hsieh2, Low-Tone Ho1
1Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei, Taiwan, Taiwan; 2Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan, Taiwan
Structural MRI and functional MR data with motor task of right index were obtained from fourteen normal subjects. Thalamal parcellation by probabilistic diffusion density tractography (PDD) was performed with two protocols. Protocol I applied the Brodmann areas 1-6 as targets in normalized space. And protocol II used the central correlates of motor fMRI as target. Two similarity indices of thalamus parcellation were calculated as SI(BA1-6) = 0.56and SI(motor-fMRI) = 0.96 regarding to protocol I and II, respectively. We concluded the PDD-based parcellation of motor thalamus can be validated by using the fMRI of a simple motor task.