Electrophysiological features of patients with segmental zoster paresis

Abstract:

Objective To investigate the electrophysiological features of patients with segmental zoster paresis.Methods A retrospective analysis was performed for the neural electrophysiological data of 11 patients who attended Electromyography Examination Room from October 2017 to October 2022.Results All 11 patients had abnormal electrophysiological results，and the abnormal rate of nerve conduction was 20.9%（41/196）. The abnormal rates of motor nerve conduction and sensory nerve conduction were 26.0%（26/100） and 15.6%（15/96），respectively，mainly reduction in the amplitude of the nerve involved. Compared with the contralateral side，the ipsilateral side had an abnormal rate of nerve conduction amplitude of 18.4%（36/196），with an abnormal rate of 23.0%（23/100） for motor nerve conduction amplitude and 13.5%（13/96） for sensory nerve conduction amplitude. INCAT score was positively correlated with the maximum reduction ratio of CMAP amplitude（P<0.05）. Needle electromyography showed neurogenic damage in the affected muscles.Conclusion The electrophysiological results of patients with segmental zoster paresis can be classified into nerve plexus type， nerve root type，and single nerve type， and patients mainly have axonal damage. Nerve conduction combined with needle electromyography has an important value in the early diagnosis，muscle localization， and severity assessment of segmental zoster paresis.