What is the origin of the premotor potential recorded from the second lumbrical?
When recording with a palm electrode, a premotor potential (PMP) precedes the compound muscle action potential that is evoked from the second lumbrical muscle following median nerve stimulation. The origin of this PMP has been uncertain. We demonstrate that median sensory nerve action potentials (SNAPs) can be recorded orthodromically with the palm electrode and conclude that the origin of the PMP is a median SNAP arising from antidromically activated digital sensory branches.
Takahashi
Nobushige
N
Department of Rehabilitation Medicine, Shizuoka City Hospital, Shizuoka, Japan. nobushige-t@umin.ac.jp
Takahashi
Osamu
O
Ogawa
Shinji
S
Takahashi
Morimasa
M
D000200:Action Potentials / Q000502:physiology*; D000328:Adult; D004558:Electric Stimulation; D004566:Electrodes; D005260:Female; D006801:Humans; D008297:Male; D008475:Median Nerve / Q000502:physiology*; D008875:Middle Aged; D009119:Muscle Contraction / Q000502:physiology*; D009431:Neural Conduction / Q000502:physiology*; D009475:Neurons, Afferent / Q000502:physiology*