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What is the origin of the premotor potential recorded from the second lumbrical?
Nobushige Takahashi1, Osamu Takahashi, Shinji Ogawa
1Department of Rehabilitation Medicine, Shizuoka City Hospital, Shizuoka, Japan. nobushige-t@umin.ac.jp
Abstract:
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.
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