A control study on functional magnetic resonance imaging brain map in health adult undergoing clenching and relaxing the fist / 中国医师进修杂志

ABSTRACT

Objective To observe the characteristic of the functional magnetic resonance imaging (fMRI) brain map in health adult undergoing clenching and relaxing the fist, for exploring the essence of the fMRI brain map in patients suffering from motor dysfunction by cerebrovascular accidents. Methods Twelve healthy volunteers had been chosen to partake the experience. Everyone had accomplished the following three actions separately (1) Only clenching and relaxing the fist of left hand. (2) Only clenching and relaxing the fist of right hand. (3) Clenching and relaxing the fist of both hands at one time. The data had been analyzed statistically using analysis of functional neuroimages (AFNI) software. Results Under condition of F (6,1121), P = 0.005. Only clenching and relaxing the fist of left hand had gained the following brain functional area right precentral gyms, left parietal,right superior temporal gyrus,right parietal, right parahippocampal gyrus, right superior frontal gyrus, right medial frontal gyrus, left precuneus, right superior parietal lobule, right middle frontal gyrus, left superior frontal gyrus. Only clenching and relaxing the fist of right hand had gained the following brain functional area left precentral gyms, left postcentral gyrus right parietal, right medial frontal gyrus. Clenching and relaxing the fist of beth hands simultaneously had gained the following brain functional area left precentral gyms,left postcentral gyrus, right precentral gyrus, right postcentral gyrus. Conclusions Hand movement (clenching and relaxing the fist) has its own specific brain activated areas. The brain areas activated by clenching and relaxing the fist of both hands simultaneously concentrate in the motor area of both cerebral hemisphere. The brain areas activated by clenching and relaxing the fist of single hand contain not only the motor area, but also the supplementary motor area. As compared with the right handedness, the brain areas activated by clenching and relaxing the fist of left hand is more widespread.