Experimental Studies Of Electro-acupuncture Treatment Of Cervical Source Sexy Deafness

Objective: To explore the mechanism of electroacupuncture treating the sensorineural deafness (SND) induced by vertebroarterial type cervical spondylosis (VCS).Methods: Rabbit model of the VCS was established by injection of tissue sclerosing remedy-775 into the soft tissue on the left side of cervical vertebral transverse processees. From the 6th weeks after the injection, electroacupuncture treatment was given at bilateral Tinggong(SI19) for 2 weeks in the electroacupuncture group. The auditory brainstem response (ABR) evoked by click at low (10 Hz) and high (50 Hz) stimulating rates, the -SP/AP value in electrocochleogram(EcochG), and the threshold of the cochlear nerve action potential(AP) in EcochG induced by low(1000 Hz) and high(6000 Hz) frequency tone were recorded respectively from the left side of ears. And the digital substaction angiography(DSA) was examined.Results: The III and IV wave peak latency(PL) and the I -III and I -IV wave interpeak latency(IPL) of ABR at 50 Hz high stimulating rate in the model group became longer than those in the control group (P<0.05,P<0.01), but the electroacupuncture group was shorter than the model group (P<0.05 ). There were no significant difference in ABR at 10 Hz low stimulating rate among the three groups(P>0.05). The thresholds of AP were significantly higher in the model group and the electroacupuncture group than those in the control group (P<0.01); and those at 6000 Hz frequency were higher than those at 1000 Hz in the model group(P<0.05 ); and at 1000 Hz and 6000 Hz in the electroacupuncture group were lower than those in the model group(P<0.05,P<0.01). The -SP/AP value of the electroacupuncture group was significantly lower than the model group (P<0.01). After electroacupuncture therapy , the DSA was not changed.Conclusion: Electroacupuncture can improve the neuron synapses efficiency of the brainstem and the conduction of the peripheral cochlear path, and raise the cochlear sensory levels for high and low frequency sound, and recover the function of hearing in the cervicogenic SND.