Effect of extradural morphine on somatosensory evoked potentials to dermatomal stimulation.
The effect of the extradural (L2-3) administration of morphine 6 mg on early (less than 0.5 s) somatosensory evoked cortical potentials (SEP) to electrical stimulation of the L1- and S1-dermatomes was examined in eight patients. Extradural morphine did not influence SEP amplitude. SEP latency did not change, except for a minor increase in the latencies of the onset and the P2 components following S1 stimulation.
Lund
C
C
Department of Anaesthesiology, Hvidovre University Hospital, Denmark.
Selmar
P
P
Hansen
O B
OB
Jensen
C M
CM
Kehlet
H
H
D000328:Adult; D000767:Anesthesia, Epidural; D004558:Electric Stimulation; D005073:Evoked Potentials, Somatosensory / Q000187:drug effects*; D005260:Female; D006801:Humans; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D013116:Spinal Cord / Q000502:physiology*; D013997:Time Factors
D009020:Morphine