RESUMO
Objective To observe responses of brain evoked by somatic stimuli in healthy subjects with blood oxygenation level-dependent functional magnetic resonance imaging.Methods There were 30 healthy subjects in the study. Block design was used infunctional MR imaging. In experimental tasks somatic stimuli was executed to the hands of every subject at duration 1000 ms,interstimulus intervals 1000 ms.The professional software-SPM99 was performed to process the images.Results For healthy subjects to somatic stimuli, significant activation was observed in bilateral primary and secondary somatic cortex of precentral gyri and postcentral gyri, and temporallobes. Scattered activations could be seen in frontal lobes, supramarginal gyri and hemisphere of cerebella. There was more intensiveactivation in right hemisphere than that in left. There was no significant difference between the activation evoked by somatic stimuli of leftand right extremities. Conclusion somatic stimuli can evoke significant activations in bilateral primary and secondary somatic cortex.Temporal lobes and other brain areas join in the process of somatic stimuli.