. 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. VISION. 698 Iso be made each eye) be •e. xist may be 1 not fall, as ver, is a per- this, but it »in alcohol- liar muscles, lese muscles, nents of an ', it may be diverge and downward; torn. rtain degree axis without omplish the les of the six lony, both as J., the move- %r co-ordina- We
. 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. VISION. 698 Iso be made each eye) be •e. xist may be 1 not fall, as ver, is a per- this, but it »in alcohol- liar muscles, lese muscles, nents of an ', it may be diverge and downward; torn. rtain degree axis without omplish the les of the six lony, both as J., the move- %r co-ordina- We may speak of that position of the eye when, with the head vertical in the standing position, the distant horizon is viewed as the primary position and all others as secondary positions. Fig. 434 is meant to illustrate diagrammatical- ly the movements of the eyeball. While the several recti muscles elevate or depress the eye, and turn it inward or outward, and the oblique muscles rotate it, the move- ments ^produced by the su- perior and inferior recti are always corrected by the assistance of the oblique muscles, since the former lend of themselves to turn the eye somewhat inward. In like manner the oblique muscles are corrected by ihe recti. ThefoUowingtab- ular statement will express the conditions of muscular contraction for the various movements of the eye:. Tia. 4B4.—Dtagram intended to Ulnatrate actioii of ejctrimlo ocular mueotea (after Fick). The heavy Uoea repreaent the mn«ilea of Uie eyeball, and tha line linea the azato b/movement Straight move- ments. Oblique move- monts. Eleyfttion Rectus superior and obliquus inferior. Depression Rectus inferior and obliquns superior. Adduction to nasal .Rectus intemus. Adduction to malar .Rectus extemus. ' Elevation witli superior and intemus, with obli- quus inferior. Depression with inferior and internus with obliquus superior. Elevation with Rectus superior
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Keywords: ., bookauthormillswes, bookcentury1800, bookdecade1880, bookyear1889
