Observation on Topographical Mapping of Evoked Potential in the Cortical SomatosensoryArea I During Imitating Sensation Conduction along Meridian / 中华中医药杂志

ABSTRACT

Objective: The topographical mapping technique of brain evoked potential was used to observe the changes of the functional activities in the cortical somatosensory area I (SⅠ) during imitating the sensation conduction along the Meridian (SCM). The formation mechanism of sensation conduction was discussed here. Method: 26 healthy adult volunteers were chosen as observe object. Cerebral electric signal processing system was used to record topographical mapping of evoked potential in SⅠ outside the skull. Soft paintbrush was used to slightly brush the Gall Bladder Meridian (GBM) to imitate the sensation conduction. Result: Evoking responses appeared in both foot and face representation areas in SⅠ of 11 healthy volunteers without conduction sensation during imitation of sensation conduction along the GBM (SCGBM), which coincided with the distribution of responses evoked in SI during sensation conduction along Meridian . 15 healthy volunteers were offered imitation of SCGBM as well as brushing through the upper arm additionally, while, the results showed that the evoking responses appeared in the foot, the upper arm and the face representation area of SⅠ. So, it formed a high potential response belt that was similar to the course occurred during the imitation of SCM. Conclusion: The external stimulation along the meridian course can change the distribution of evoking responses in SⅠduring stimulating point. The results provide experimental evidence for the supposition that “activation in sequence in periphery” is the decisive factor for the formation of SCM.