|
KMID : 0860920200220020081
|
|
Journal of the Korean Association EMG-Electrodiagnostic Medicine
2020 Volume.22 No. 2 p.81 ~ p.85
|
|
|
Relationship Between Cervical Nerve Root Entrapment Due to Cervical 6-7 Foraminal Stenosis and Sensory Nerve Action Potentials in Nerve Conduction Study
|
|
Kang Cheon-Ji
Kim Ja-Young
Kim Dae-Yul
|
|
|
Abstract
|
|
|
Objective: To compare the sensory nerve action potentials (SNAPs) between patients with cervical 6-7 foraminal stenosis (FS) and those without.
Methods : We enrolled patients who underwent a bilateral nerve conduction study (NCS) between January 2016 and December 2017. The FS group (n=35) included patients whose lesion was located at C6-7 FS. The non-FS group (n=75) had no lesions at C6-7 foramen. The amplitudes and latencies of SNAPs on the affected side were compared between the two groups. The proportion of those with abnormal SNAP responses was also evaluated.
Results : Compared with the non-FS group, the FS group had a significantly lower amplitude (30.5 vs. 40.2 μV; age-adjusted p<0.001) and a longer latency (3.31 vs. 3.17 ms; age-adjusted p=0.001) of the median nerve. Abnormal amplitude was observed in 20.0% of the FS group and 4.0% of the non-FS group (age-adjusted p=0.007), and abnormal latency was observed in 45.7% of the FS group and 26.7% of the non-FS group (age-adjusted p=0.010). The median SNAP ratio between the affected side and the unaffected side was not significantly different between the two groups.
Conclusion : Patients with C6-7 FS had a lower amplitude and a longer latency of the median nerve than did those without. Abnormal SNAP amplitude and latency were significantly more common in patients with FS. SNAP amplitude may be used as a predictor of cervical FS.
|
|
|
KEYWORD
|
|
|
Electrodiagnosis, Cervical foraminal stenosis, Sensory nerve action potential, Median nerve
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
 
|