Study on evoked potentials of the lesion ventrally and dorsally located on spinal cord by the simultaneous recording
Zheng Juyang · 1999
Objective To study the sensory evoked potential which could show the lesion on the spinal cord ventrally, and evaluate its application in clinical practice.Methods By stimulating the posterior tibial nerve, the evoked potentials were recorded on the Cz Fpz,and occiput Fpz simultaneously. Health controls and patients of spinal and cerebellar disease have been investigated. The difference of evoked potentials between Cz Fpz and occiput Fpz were compared,abnormal patterns of the potential from occiput Fpz were studied in patients with lesion located ventrally and dorsally on spinal cord or cerebellum.Results The evoked potentials recorded from Cz Fpz and Occiput Fpz were independent. The evoked potential of Cz Fpz could reflect lesions located dorsally on spinal cord.The lesion located ventrally in the spinal cord and cerebellum could affect the evoked potential recorded from occiput.The abnormal forms of occiput Fpz potential were absent,or decreased amplitude,prolonged lantency in N30 and P40.N30 sometime could show abnormal shape without sharp peak. Conclusion The combination of potentials recorded from Cz Fpz and Occiput Fpz has an important value in detection and diagnosis of spinal diseases.