Abstract
Intracranial spread of current from monopolar and bipolar electrode configurations was evaluated by using a motor effect of VII nerve stimulation. A tripolar electrode was lowered through the medulla toward the nerve in 1 mm steps; the currents necessary to produce threshold levels of sustained vibrissae vibration with monopolar and bipolar combinations of tips were determined at each step. Bipolar stimulation had a steep gradient and its effects were largely confined to a region within 2 mm of the minimum threshold point. Monopolar stimulation had a broader gradient and spread further. This technique appears promising for quantitative evaluation of ICS characteristics.
Original language | English (US) |
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Pages (from-to) | 769-773 |
Number of pages | 5 |
Journal | Physiology and Behavior |
Volume | 25 |
Issue number | 5 |
DOIs | |
State | Published - Jan 1 1980 |
Keywords
- Brain stimulation
- Current spread
- Monopolar vs bipolar
- VII nerve
- Vibrissae movement