Directions for Class Work in Practical Physiology, Elementary Physiology of Muscle And Nerve And of the Vascular And Nervous Systems
The book Directions for Class Work in Practical Physiology, Elementary Physiology of Muscle And Nerve And of the Vascular And Nervous Systems was written by author Sharpey-Schäfer, E. A. (Edward Albert), Sir, 1850-1935 Here you can read free online of Directions for Class Work in Practical Physiology, Elementary Physiology of Muscle And Nerve And of the Vascular And Nervous Systems book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Directions for Class Work in Practical Physiology, Elementary Physiology of Muscle And Nerve And of the Vascular And Nervous Systems a good or bad book?
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Inject a very small dose of strychnin (i drop of a I per 1,000 solution) under the skin of a decerebrate frog, and wait for a few minutes until it is absorbed into and distributed by the circula- tion. It will then be found that the slightest touch of the skin produces not a simple purposeful reflex action, but convulsive contractions of all the mus- cles in the body. Reaction time in man. — The reaction time in man may be determined by an arrangement of electric signals, but is done more simpl...y by Wal- ler's apparatus. This consists of two wooden lev- ers lying across a piece of india-rubber tube, one end of which is closed, the other being con- nected with a tambour which writes upon a drum, the speed of which should be moderate. A screen is used to hide the movements of the experimenter PRACTICAL PHYSIOLOGY 75 from the person experimented on. The latter sits at the table with one finger resting lightly on one of the levers. He is to respond by pressing the lever the instant he (a) feels a tap on that finger, his eyes being shut ; (p) hears a tap on the second lever ; (c) sees the movement which is imparted to the second lever by the experimenter, who presses it down on the other side of the screen.
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