Far‐field recording of the junctional potential generated by median nerve volleys at the wrist
- 1 November 1986
- journal article
- research article
- Published by Wolters Kluwer Health in Neurology
- Vol. 36 (11) , 1451
- https://doi.org/10.1212/wnl.36.11.1451
Abstract
In 20 arms from 10 healthy subjects, the orthodromic median sensory volleys crossing the wrist gave rise to a stationary, biphasic potential rendering the forearm initially positive (Pw) and subsequently negative (Nw) compared with the hand. A pair of electrodes located on each side of the wrist best detected the junctional potential, PW-NW, that developed across the partition. Here the hand and the forearm each, in effect, acted as a lead, connecting any points within the respective compartment to the voltage source. Thus, nearly the same potential difference appeared across the wrist regardless of the inter-electrode distance, allowing the detection of the voltage step in far-field derivation. Our data verify that not only positive but also negative peaks of scalp-recorded evoked responses could represent junctional potentials generated along the course of the conduction medium in the absence of fixed neural discharges.This publication has 10 references indexed in Scilit:
- Far‐field potentials from peripheral nerveNeurology, 1986
- What determines the latency and amplitude of stationary peaks in far‐field recordings?Annals of Neurology, 1986
- Stationary negative potentials near the source vs. positive far-field potentials at a distanceElectroencephalography and Clinical Neurophysiology, 1985
- Stationary peaks from a moving source in far-field recordingElectroencephalography and Clinical Neurophysiology, 1984
- Spinal and far-field components of human somatosensory evoked potentials to posterior tibial nerve stimulation analysed with oesophageal derivations and non-cephalic reference recordingElectroencephalography and Clinical Neurophysiology, 1983
- Unexpected latency shifts of the stationary P9 somatosensory evoked potential far field with changes in shoulder positionElectroencephalography and Clinical Neurophysiology, 1983
- Field distribution of antidromically activated digital nerve potentialsNeurology, 1983
- Short latency somatosensory evoked potentials to median nerve stimulation: effect of low frequency filterElectroencephalography and Clinical Neurophysiology, 1983
- Prevertebral (oesophageal) recording of subcortical somatosensory evoked potentials in man: The spinal P13 component and the dual nature of the spinal generatorsElectroencephalography and Clinical Neurophysiology, 1981
- Topography and intracranial sources of somatosensory evoked potentials in the monkey. I. early componentsElectroencephalography and Clinical Neurophysiology, 1979