Physiology : a manual for students and practitioners . f Sylvius and in theisland of Reil. This centre seems to be much more developed uponthe left side of the brain. In Fig. 36 this centre may be indicatedroughly by reference to the tongue-centres (8 and 9). Do the evidences of pathology agree with these experiments ? Injuries and diseases involving the motor areas are followed byparalysis so well defined that it is frequently possible to locatethe seat of the lesion from its result upon the inuscular , abscesses, and depressed bone, for example, are capableof accurate localizati
Physiology : a manual for students and practitioners . f Sylvius and in theisland of Reil. This centre seems to be much more developed uponthe left side of the brain. In Fig. 36 this centre may be indicatedroughly by reference to the tongue-centres (8 and 9). Do the evidences of pathology agree with these experiments ? Injuries and diseases involving the motor areas are followed byparalysis so well defined that it is frequently possible to locatethe seat of the lesion from its result upon the inuscular , abscesses, and depressed bone, for example, are capableof accurate localization in this way. The more indefinite sen-sory paralyses do not so accurately point out their origin. Onthe whole, the evidence of pathology bears out in full the experi-mental results. The crossed action of all the nervous structuresis especially to be noted. In the case of a right paralysis in THE CEREBRUM. 129 which the speech is affected, as compared with a left heniiple<riaand speech unaffected, this crossed action is impressed when we Fio. Brain of Monkey, showing the position of the motor and sensory centres as ascertainedby Ferrier. The actions all occur on the side of the body opposite to the part of thebrain irritated : 1, the eyes open widely, the pupils dilate, and bead and eyes turn to-ward opposite side ; 2, extension forward of the opposite arm and hand, as if to reachsomething in front; 3, movements of tail (and trunk); 4, retraction with adduction ofopposite arm ; 5, supination and Ilex ion of the forearm, by which the arm is raised to-ward the mouth ; fi, action of zygonKities, by which the angle of mouth is retracted andelevated; 7, elevation of alaof nose and upper lip; 8, opening of mouth with protnisionof tongue; 9, retraction of tongue; 10, retraction of opposite angle of mouth ; a,b,c,(l,prehensile movements; 11, retraction and adduction of opposite arm ; 12, advance ofthe opposite hind limb; 13, complex movements of thigh, leg, and foot; 14,15, vi
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectphysiology, bookyear1
