Balance For Healthy Adults Cortical Somatosensory Evoked Potential Impact Of Experimental Research

ObjectiveResearch the changes of evoked potentials (SEP) about analgesic action in healthy adults treated by balanced acupuncture,explore the immediate effect of analgesic by balanced acupuncture in neural electrophysiology mechanism.MethodsSelected20healthy adults, take self-contrast at before and after balance acupuncture, Stimulating electrodes located in2-3cm after inside ankle,making skin pain corresponding to the inside posterior tibial nerves stimulation the other side ankle pain point, Observe all sorts of changes at different time before and after acupuncture changes (before acupuncture, instantly, after acupuncture5min and after lOmin acupuncture) and the changes at amplitudes and latency and relatively latency and relatively amplitude of four waves in P40、 N45、P60、N75by used the SEP of Viking Nicolet Quest12.0version which made in USA.Results1. The influence on latencyThe latency of four waves is significantly extended at acupuncture immediately in P40、 N45、P60、N75, Statistically difference is very significant in P40. P60. N75(P<0.01), N45statistically significant difference (P<0.05).The latency of P40、N45、N75are different degrees of shorten after acupuncture at5min and10min than before acupuncture. The latency of P60is more shorter after5min than before acupuncture (P<0.05) and is extended after10min (P<0.01)2. The influence on amplitudeThe amplitude of N45is different degrees of lower after acupuncture at10min than before acupuncture (P<0.01).3. The influence on relatively latencyCompared with before acupuncture, the relatively latency of N45P60is significantly extended at acupuncture immediately (P<0.01). After acupuncture10min, the relatively latency of P40N45and P60N75is significantly extended (P<0.05)4. The influence on relatively amplitudeCompared with before acupuncture, the relatively amplitude of P40N45is Significantly lower at acupuncture immediately and after5min and10min, Compared with before acupuncture, the relatively amplitude of N45P60and P60N75is Significantly higher at acupuncture immediately (P<0.01).ConclusionThe latency of balanced acupuncture is significantly extended at acupuncture immediately.The change of wave point:Acupuncture signals and pain signals convergence in the human cerebral cortex corresponding somatosensory area. Convergence result is that pain signals can be suppressed by acupuncture signal.That is to say, acupuncture signal suppression the number of firing neurons cortial pain evoked potential.Finally,the pain is eliminated, especially,the effect is obviously at acupuncture immediately.