Proximally evoked soleus H-reflex to S1 nerve root stimulation in sensory neuronopathies (ganglionopathies)
Version of Record online: 12 OCT 2013
Copyright © 2013 Wiley Periodicals, Inc.
Muscle & Nerve
Volume 48, Issue 5, pages 814–816, November 2013
How to Cite
Zhu, D.-Q., Zhu, Y., Qiao, K., Zheng, C.-J., Bradley, S., Weber, R. and Chen, X.-J. (2013), Proximally evoked soleus H-reflex to S1 nerve root stimulation in sensory neuronopathies (ganglionopathies). Muscle Nerve, 48: 814–816. doi: 10.1002/mus.23975
- Issue online: 28 OCT 2013
- Version of Record online: 12 OCT 2013
- Accepted manuscript online: 28 JUL 2013 10:31PM EST
- Manuscript Accepted: 17 JUL 2013
- high voltage electrical stimulation;
- S1nerve root stimulation;
- sensory axonopathy;
- sensory neuronopathy
Sensory neuronopathy (SNN) mimics distal sensory axonopathy. The conventional H-reflex elicited by tibial nerve stimulation (tibial H-reflex) is usually abnormal in both conditions. We evaluated the proximally evoked soleus H-reflex in response to S1 nerve root stimulation (S1 foramen H-reflex) in SNN.
Eleven patients with SNN and 6 with distal sensory axonopathy were studied. Tibial and S1 foramen H-reflexes were performed bilaterally in each patient.
Tibial and S1 foramen H-reflexes were absent bilaterally in all patients with SNN. In the patients with distal sensory axonopathy, tibial H-reflexes were absent in 4 and demonstrated prolonged latencies in 2, but S1 foramen H-reflexes were normal.
Characteristic absence of the H-reflex after both proximal and distal stimulation reflects primary loss of dorsal root ganglion (DRG) neurons and the distinct non–length-dependent impairment of sensory nerve fibers in SNN. Muscle Nerve 48:814–816, 2013