Correlation between the MRI-based grading system and F wave as well as H-reflex in patients with lumbar disc herniation
10.3969/j.issn.2095-4344.2016.42.017
- VernacularTitle:腰椎间盘突出症MRI分级与F波及H反射的相关性
- Author:
Xiao LI
;
Caina LIN
;
Haijie LUO
;
Qing WAN
;
Yuting RUAN
;
Xinsheng ZHANG
;
Shaoling WU
;
Chao MA
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2016;20(42):6343-6350
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND:Lumbar spine MRI and electrophysiological test are reliable methods for evaluating nerve root injury caused by lumbar disc herniation.
OBJECTIVE:To analyze the correlation between the MRI-based grading system and the latency and frequency of F wave as wel as latency and amplitude of H-reflex in patients with lumbar disc herniation.
METHODS:MRI imaging of the lumbar spine was performed with a 3.0-T imager and a dedicated TCL coil to classify lumbar disc herniation and nerve root compression. F wave and H reflex were detected on the patient bilateral tibial nerves using Oxford myoelectricity evoked potential instrument.
RESULTS AND CONCLUSION:Spearman correlation analysis showed that the MRI-based grading of patients with lumbar disc herniation had a negative correlation with F wave frequency (r=-0.594 0, P<0.000 1), and a positive correlation with F wave latency (r=0.825 6, P<0.000 1) and H-reflex latency (r=0.875 0, P<0.000 1), but no correlation with H-reflex amplitude (R=0.117 4, P=0.257 3). With MRI grading increased, F wave frequency was decreased, and F wave and H-reflex latency were prolonged gradual y, indicating aggravating nerve root compression.
