Describe the contributions of the early neuroscience researchers Galvani, Fritsch and Hitzig, and Helmholtz.
What will be an ideal response?
These researchers were critical in first identifying that the nervous system communicates using electrical signals. Galvani, in the late 1700s, was able to animate a dead frog's leg by using an electrical current, first demonstrating that electricity could be used in the body. In the late 1800s, Fritsch and Hitzig applied electrical current to the brains of dogs and found that the dogs' muscles moved. This took Galvani's work one step further by showing that an electrical current could produce activity in a living animal. Helmholtz has been the most influential of these early physiologists in measuring the speed at which electrical signals travel in nerve cells (90 feet/second) and showing that this is much slower than the speed of electrical signals that are sent down a wire. Helmholtz set the groundwork for later physiologists by showing how electrical signals in the nervous system function as a biological system.
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The best estimate of how you will feel about sex when you are older is how you feel about it now
a. True b. False
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A) ?50 milliseconds B) ?500 milliseconds C) ?2 seconds D) ?7 seconds
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