Unformatted text preview: negative pulse in recorded voltage _ _ _ _ as it passes the recording electrode. At a later time, the negative wave of extracellular potential passes the _ recording electrode, where it contributes a positive pulse to the recorded voltage _ _ _ _ . If the electrodes are more closely spaced (center panel), the negative and positive parts of the recorded voltage _ _ _ _ merge, and the resulting waveform is called a diphasic compound action potential . The propagation can be blocked by a number of methods including mechanical methods (pressure applied to the nerve or crushing the nerve with forceps), electrical methods (passing a blocking level of current through the nerve), or chemical methods (applying potassium chloride, local anesthetics, cocaine, or tetrodotoxin to the nerve)....
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- Fall '11
- Neuroscience, Action Potentials, Potassium Chloride