Cervical spondylosis as a possible hidden reason beyond delayed phrenic nerve distal motor latency

Abstract Background Cervical spondylosis is a chronic degenerative condition of the cervical spine that can affect nerve roots. The origin phrenic makes it vulnerable to injury. purpose this study investigate possible subtle affection in patients with using conduction studies (NCS). This was conducted on 30 above C5 and healthy volunteers. Nerve both nerves were performed all cases. Results showed statistically highly significant prolongation distal motor latency (DML) than control group ( P < 0.01). There no difference regarding amplitude > 0.05). correlation between DML X -ray score r Conclusions an underestimated cause delayed DML. delay severity spondylosis.