TY - JOUR
T1 - Far-field recording of the junctional potential generated by median nerve volleys at the wrist
AU - Kimura, Jun
AU - Ishida, Tetsuro
AU - Suzuki, Shoji
AU - Kudo, Yutaka
AU - Matsuoka, Hiroo
AU - Yamada, Thoru
PY - 1986/11
Y1 - 1986/11
N2 - 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.
AB - 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.
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U2 - 10.1212/wnl.36.11.1451
DO - 10.1212/wnl.36.11.1451
M3 - Article
C2 - 3762964
AN - SCOPUS:0023035679
VL - 36
SP - 1451
EP - 1457
JO - Neurology
JF - Neurology
SN - 0028-3878
IS - 11
ER -