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Percutaneous S1 root somatosensory evoked potential
1Department of Neurology, College of Medicine, University of Arizona, Tucson 85724, USA.
Electromyography and Clinical Neurophysiology
|April 1, 1995
Summary
This study demonstrates that stimulating the first sacral root via the dorsal sacral foramen yields a high-amplitude spinal response. However, cortical evoked potentials were inconsistently recorded, showing variable latencies and amplitudes.
Area of Science:
- Neuroscience
- Electrophysiology
Background:
- Evoked potentials are crucial for assessing neural pathway integrity.
- Percutaneous stimulation offers a minimally invasive approach to nerve root evaluation.
Purpose of the Study:
- To investigate the feasibility of recording spinal and cortical evoked potentials from the first sacral root.
- To characterize the electrophysiological responses following percutaneous stimulation of the S1 root.
Main Methods:
- Spinal and cortical evoked potentials were recorded.
- Percutaneous stimulation of the first sacral root was performed via the dorsal sacral foramen.
- Surface electrodes were utilized for signal acquisition.
Main Results:
- A high-amplitude spinal response was consistently and easily recorded.
- Cortical responses were inconsistently elicited.
- Cortical responses exhibited significant variability in latency, amplitude, and morphology.
Conclusions:
- Percutaneous stimulation of the first sacral root provides a reliable method for recording spinal evoked potentials.
- The inconsistent elicitation and high variability of cortical evoked potentials suggest challenges in their clinical application for S1 root assessment.