Drawing upon the logic of Von Helmholtz' investigation of the speed of neural conduction, Donders', a Dutch physiologist, extended that work in an attempt to measure the speed of certain mental processes. Later still, in the last half of the 20th century, a variation on the Donders task, the “Sternberg Task was
a. Sketch out the procedure used by Helmholtz in measuring the speed of neural conduction in the motor nerve of a frog's leg.
Helmholtz tried to measure the speed of nerve transmission in frogs. He did this by measuring the time taken between stimulation of a body part of the frog and the muscular contraction that followed. He dissected the sciatic nerve which was attached to the calf muscle of the frog. He used a galvanometer to record the timings. He then stimulated the nerve near the muscle of interest and then a nerve that was farther. He calculated the velocity of the impulse. Then he reported the speed of nerve transmission in the range of 24-36 meters per second. He later applied this technique on humans.
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Drawing upon the logic of Von Helmholtz' investigation of the speed of neural conduction, Donders', a...
Drawing upon the logic of Von Helmholtz' investigation of the speed of neural conduction, Donders', a Dutch physiologist, extended that work in an attempt to measure the speed of certain mental processes. Later still, in the last half of the 20th century, a variation on the Donders task, the “Sternberg Task was c. Sketch out Donder's the three steps for measuring choice reaction time. (Donder's Subtraction Method)