|Contents of Nerve Impulse Part IIEquipmentThresholdConduction VelocityRefractory PeriodSummation of Subthreshold StimuliDirectionalityMonophasic Action Potentials|
Details of Nerve Impulse, Part IIP
art two of this program presents the equipment to be used in recording the compound action potential. The equipment includes a Tektronix model 5113 dual beam, dual trace storage oscilloscope, a Grass model S-44 stimulator with a Sl-5 isolation unit and a nerve chamber. The tape continues with a demonstration of threshold and maximal response. The conduction velocity in the frog sciatic nerve is examined followed by a demonstration of the refractory period and directionality.The next sequence in this tape deals with the summation of subthreshold stimuli. A discussion of the strength duration curve concludes this section of the tape.The program concludes with a demonstration of monophasic potentials from the frog sciatic nerve, resulting from crushing the nerve between the recording electrodes.This tape includes a single channel of data readout of each of the aforementioned parameters (excepting conduction velocity). The data has been recorded as a digital signal and rerecorded as an analog signal which can be displayed on an oscillographic recorder.