Electroencephalography and clinical neurophysiology
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Electroencephalogr Clin Neurophysiol · Dec 1983
Spinal and far-field components of human somatosensory evoked potentials to posterior tibial nerve stimulation analysed with oesophageal derivations and non-cephalic reference recording.
Somatosensory evoked potentials (SEPs) were elicited by stimulation of the right posterior tibial nerve at the ankle in 20 experiments on 18 normal adults. A non-cephalic reference on the left knee was used throughout (with triggering of averaging cycles from the ECG), except for recording the peripheral nerve potentials. The responses were recorded along the spine, from oesophageal probes and from the scalp. ⋯ The P31 reflects the initial volley in the medial lemniscus. The P40 at Cz represents the cortical response of the foot projection. Average central CVs were calculated and discussed.