alexa Correlation between Dermatomal Somatosensory Evoked Pot
ISSN: 2329-9096

International Journal of Physical Medicine & Rehabilitation
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Research Article

Correlation between Dermatomal Somatosensory Evoked Potential, Needle Electromyography and Magnetic Resonance Imaging in Chronic Sensory Lumbosacral Radiculopathies

Naglaa A Hussein1*, Alaa Abdelraouff Bayiomy2 and Mohamed Sami Barakat3

1Faculty of Medicine, Alexandria University, Resident of Physical medicine and rehabilitation, Albert Einstein College of medicine, NY, USA

2Department of Neurosurgery, Faculty of Medicine, Alexandria University, Egypt

3Department of Radiodiagnosis, Faculty of Medicine, Alexandria University, Egypt

*Corresponding Author:
Naglaa A Hussein
Alexandria University
Resident of Physical medicine & rehabilitation
Albert Einstein College of medicine, NY, USA
Tel: 20103714793
E-mail: [email protected]

Received Date: September 23, 2015 Accepted Date: December 15, 2015 Published Date: December 18, 2015

Citation: Hussein NA, Bayiomy AA, Barakat MS (2016) Correlation between Dermatomal Somatosensory Evoked Potential, Needle Electromyography and Magnetic Resonance Imaging in Chronic Sensory Lumbosacral Radiculopathies. Int J Phys Med Rehabil 4:318. doi: 10.4172/2329-9096.1000318

Copyright: © 2016 Hussein NA, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.



Objective: To correlate between dermatomal somatosensory evoked potential (DSEP), needle electro myography (EMG) and magnetic resonance imaging (MRI) in patients with clinical picture suggestive of chronic sensory lumbosacral radiculopathy. Design: cross sectional study. Setting: outpatient setting. Participants: 50 patients (29 Males, 21 Females) with chronic sensory lumbosacral radiculopathy. 20 healthy subjects were included as control for DSEP values. Main outcome measures: Medical history, detailed neurological examination, Lumbosacral MRI, lumbosacral DSEP and needle EMG for segment pointing muscles were done for all patients. DSEP were done for lumbosacral roots for control subjects. Results: Mean age of patients 56.36 ± 10.26. Mean disease duration 17.48 ± 6.85 months.Spondylosis constituted 74%, followed by spinal stenosis 14%, lumbar disc prolapse 8%, lastly spondylolithesis 4% In relation to sensory symptoms, DSEP is significantly higher than EMG in detecting lumbosacral radiculopathies (p=0.0001). DSEP sensitivity and accuracy is higher than needle EMG at L4, L5 and S1 In relation to MRI, sensitivity of DSEP at L4 was 93.3%, at L5 and S1 100%. Sensitivity of needle EMG at L4 was 20%, at L5 24.3%, at S1 47.1% . Conclusion: DSEP is highly sensitive than needle EMG in diagnosing and localizing chronic sensory lumbosacral radiculpathies, even if MRI findings are inconclusive.


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