The Effect of Straight Leg Raising on F-wave Parameters in Healthy Subjects and Patients with Lumbosacral Radiculopathy.
- Author:
Tae Hyun HA
1
;
Suk SON
;
Jung Han KIM
;
Hyun Suk LEE
Author Information
1. Department of Rehabilitation Medicine, Korea Veterans Hospital.
- Publication Type:Original Article
- Keywords:
F-wave;
Radiculopathy;
Straight leg raising
- MeSH:
Humans;
Leg*;
Peroneal Nerve;
Radiculopathy*;
Sciatic Nerve;
Tibial Nerve
- From:Journal of the Korean Academy of Rehabilitation Medicine
2000;24(4):704-709
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
OBJECTIVE: To determine if stretching the sciatic nerve in control and patients with lumbosacral radiculopathy significantly alters F-wave parameters. METHOD: We studied F-waves in the deep peroneal & posterior tibial nerves of 20 patients with unilateral lumbosacral radiculopathies and 22 controls. F-waves were recorded bilaterally in the neutral position and supine in 30o & 60o straight leg raising (SLR). F-wave parameters included minimal latency (F min), maximal latency (F max), mean latency (F mean), latency difference between F min and F max (chronodispersion), mean duration (F dur) and side to side difference in F min, F max, F mean and F dur. RESULTS: In controls, the F-wave latency was found to be longer in supine with SLR than in neutral position. In patients with lumbosacral radiculopathy, significant differences of F max, F mean and F dur between sides during 30o SLR were noted in the deep peroneal nerves, but all parameters in the posterior tibial nerves during SLR were not changed. CONCLUSION: In this study, we observed significant changes in F-wave latency in control during straight leg raising, but no significant changes in patients with lumbosacral radiculopathy. For the clinical application to lumbosacral radiculopathy, further study is needed.
