TY - JOUR
T1 - What determines the latency and amplitude of stationary peaks in far‐field recordings?
AU - Kimura, Jun
AU - Kimura, Akio
AU - Ishida, Tetsuro
AU - Kudo, Yutaka
AU - Suzuki, Shoji
AU - Machida, Masafumi
AU - Matsuoka, Hiroo
AU - Yamada, Thoru
PY - 1986/5
Y1 - 1986/5
N2 - In 20 radial nerves from 10 healthy persons, a referential derivation from the tip of the first or second digit registered two biphasic stationary peaks, PI‐NI and PII‐NII, following stimulation of the nerve in the forearm. These two peaks occurred slightly before the arrival of the propagating impulse at the wrist and at the base of the digit, respectively. With stepwise reduction of stimulation from a maximal to a threshold intensity, the far‐field potential decreased in amplitude linearly with the near‐field potential recorded at the junction of the volume conductor. Abduction of the first digit or flexion of the second and third digits altered the waveform and, to a lesser degree, the latency of the farfield peaks. However, these changes appeared in an inconsistent manner, which we were unable to characterize. We conclude that in far‐field recording a stationary peak results at the border of the adjoining volume conductors in proportion to the magnitude of the propagating axonal volley approaching the boundary.
AB - In 20 radial nerves from 10 healthy persons, a referential derivation from the tip of the first or second digit registered two biphasic stationary peaks, PI‐NI and PII‐NII, following stimulation of the nerve in the forearm. These two peaks occurred slightly before the arrival of the propagating impulse at the wrist and at the base of the digit, respectively. With stepwise reduction of stimulation from a maximal to a threshold intensity, the far‐field potential decreased in amplitude linearly with the near‐field potential recorded at the junction of the volume conductor. Abduction of the first digit or flexion of the second and third digits altered the waveform and, to a lesser degree, the latency of the farfield peaks. However, these changes appeared in an inconsistent manner, which we were unable to characterize. We conclude that in far‐field recording a stationary peak results at the border of the adjoining volume conductors in proportion to the magnitude of the propagating axonal volley approaching the boundary.
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U2 - 10.1002/ana.410190509
DO - 10.1002/ana.410190509
M3 - Article
C2 - 3717909
AN - SCOPUS:0022623743
VL - 19
SP - 479
EP - 486
JO - Annals of Neurology
JF - Annals of Neurology
SN - 0364-5134
IS - 5
ER -