. A text-book of animal physiology [microform] : with introductory chapters on general biology and a full treatment of reproduction, for students of human and comparative (veterinary) medicine and of general biology. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. mmm 672 ANIMAL PHTSIOLOOT. or adjacent parts of the brain. 7. Under the effects of certain drugs, as physostigmin, morphia, etc. DiUUion {Mydriasis).—1. In darkness, i. On stimulation of the cervical sympathetic. 8. During asphyxia or dyspnoea. 4. fiy painful sensations from irritation o
. A text-book of animal physiology [microform] : with introductory chapters on general biology and a full treatment of reproduction, for students of human and comparative (veterinary) medicine and of general biology. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. mmm 672 ANIMAL PHTSIOLOOT. or adjacent parts of the brain. 7. Under the effects of certain drugs, as physostigmin, morphia, etc. DiUUion {Mydriasis).—1. In darkness, i. On stimulation of the cervical sympathetic. 8. During asphyxia or dyspnoea. 4. fiy painful sensations from irritation of peripheral parts. 5. From the action of certain drugs, as atropin, etc. The student may impress most of these facts upon his mind by making the necessary observations, which can be readily done. PitholofisaL—As showing the importance of such connec- tions, we may instance the fact that, in certain forms of nervous disease (e. g., locomotor ataxia), the pupil contracts when the eye is accommodated to near objects, but not to light (the Argyll-Robertson pupil). In other cases, owing to brain-dis- ease, the pupils may be constantly dilated or the reverse; or one may be dilated and the other contracted. Optical Impkbfbctionb or the Eye. The defects to be noticed now ire common to all human eyes, and probably to the eyes of eXi. mammals, though in some persons certain of them, as astigmatism, are of so serious a character that they require special remedies. J^^hniMl AbmmUoB.—The nature of this defect may be best learned from an examination of Fig. 414, below. It will be seen that rays of light passing through the lens are brought to. b li Mt pWflMStlr riMVPtr l»tatm»Atta,8, a focus, varjring with the point of the lens through which they pass, the focusing power of any ordinary convex lens being greater toward the circumference. This defect is believed to be corrected in the human eye, at least to some extent, by the following: 1. The iris cute off the more strongly refr
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Keywords: ., bookauthormillswes, bookcentury1800, bookdecade1880, bookyear1889
