Percutaneous S1 root somatosensory evoked potential.
Spinal and cortical evoked potentials were recorded in response to percutaneous stimulation of the first sacral root which was accessed via the dorsal sacral foramen. A very high amplitude spinal response is easily recordable using surface electrodes. Cortical responses were inconsistently elicited and had highly variable latencies, amplitudes and morphologies.
Bamford
C R
CR
Department of Neurology, College of Medicine, University of Arizona, Tucson 85724, USA.
Graeme
K
K
D000328:Adult; D004558:Electric Stimulation; D004576:Electromyography; D005073:Evoked Potentials, Somatosensory / Q000502:physiology*; D005260:Female; D005727:Ganglia, Spinal / Q000502:physiology*; D006801:Humans; D008297:Male; D011930:Reaction Time / Q000502:physiology; D012867:Skin / Q000294:innervation*