Clinical Characteristics and Neurophysiology of Lumbosacral Herniated Nucleus Pulposus (HNP)
Rindha Dwi Sihanto1*, Putu Setiani1, I Gusti Ngurah Purna Putra1, Kadek Ayu Wiswapawani2
Abstract
Background: The most common causes of lower back pain (LBP) are lumbosacral herniated nucleus pulposus (HNP), especially at the L5-S1 disc. EMG is one of the choices to determine localization, distinguishing root irritation from root compression, and is an initial non-invasive examination with a relatively low cost. Information on the delivery of electrical impulses through the proximal segment of the spinal cord can only be known through examination of the F-response and H-reflex. The value of both examinations can be used to determine the presence of L5-S1 radiculopathy. Method: This is an analytical cross-sectional study, using consecutive sampling on patients with lumbosacral HNP. Examination of NCV, F-and H-reflex response were assessed and their values compared between lumbosacral HNP irritation lesions and compression lesions. Result: Among 50 samples with dominance of LBP, the mean of CMAP for latency, amplitude, NCV of tibial nerve 4,47±1,15msec;6,59±1,85mV;53,95±6,65m/sec and peroneal nerve 3,29±1,15msec;2,25±0,84mV;54,67±8,25m/sec. The mean of SMAP for latency, amplitude, NCV of sural nerve 4,17±0,67msec;6,73±2,98µV;59,06±9,12m/sec. Different results between the value of F-response and H-reflex examination according to compression lesions (p<0.05). But there is no difference between the value of examination F-response and H-reflex according to irritation lesions (p>0.05). Conclusion: Average value of patients with LBP of normal motor and sensory NCV, a significant difference in outcome between parameter value of F-response (minimum F wave latency, chronodispersion, and persistence) and parameter value of H-reflex (H/M ratio).
Keywords
Lumbosacral HNP; LBP; NCV; F-responses; H-reflex.
Cite This Article
Sihanto, R. D., Setiani, P., Putra, I. G. N. P., Wiswapawani, K. A. (2025). Clinical Characteristics and Neurophysiology of Lumbosacral Herniated Nucleus Pulposus (HNP). International Journal of Scientific Advances (IJSCIA), Volume 6| Issue 4: Jul – Aug 2025, Pages 729-732 URL: https://www.ijscia.com/wp-content/uploads/2025/07/Volume6-Issue4-Jul-Aug-No.920-729-732.pdf
Volume 6 | Issue 4: Jul – Aug 2025
