. General physiology; an outline of the science of life. STIMULI AND THEIR ACTIONS 377 both those that produce motor impulses, and those that are the seat of the sensations, of consciousness. In their anaesthe- tising action upon the cells of the central nervous system lies the extraordinary practical importance of the narcotics. Through the abolition of sensations, especially of pain, they confer enormous benefits upon mankind. But their misuse, especially that of alcohol and morphine, by inflicting irreparable injuries upon the. Fia. 169.—Ganglion-cells of a morphinlsed dog, stained by Golgi
. General physiology; an outline of the science of life. STIMULI AND THEIR ACTIONS 377 both those that produce motor impulses, and those that are the seat of the sensations, of consciousness. In their anaesthe- tising action upon the cells of the central nervous system lies the extraordinary practical importance of the narcotics. Through the abolition of sensations, especially of pain, they confer enormous benefits upon mankind. But their misuse, especially that of alcohol and morphine, by inflicting irreparable injuries upon the. Fia. 169.—Ganglion-cells of a morphinlsed dog, stained by Golgi's method. In A all, and In Ji most of the protoplasmic processes have assumed a moniliform appearance. (After Demoor.) cells, produces most destructive effects and transforms the benefit into a serious evil. Recently a number of investigators, such as Meynert, Lepine, Duval, Solvay and others, have put forward the view that gang- lion-cells possess the power of amoeboid motion, their protoplasmic processes, or dendrites, being able to shorten and lengthen. Hence it is highly interesting to show, as Demoor ('96) has very recently succeeded in doing, that under the influence of morphine in nar- cosis, and also of other stimuli, distinct phenomena of contraction can be observed in the dendrites of the ganglion-cells, or neurons, which correspond exactly to those contractile phenomena that. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Verworn, Max, 1863-1921; Lee, Frederic S. (Frederic Schiller), 1859-1939. London, Macmillan and co. , limited; New York, The Macmillan company
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