Carpenter's principles of human physiology . face, mouth and tongue, eyes, ears, &c, could be definitely anddistinctly excited. The method of stimulation he employed was the directapplication to the surface of the hemispheres of a pair of the blunted electrodesof the secondary spiral of Du Bois-Reymonds induction coil, connected with acell of the mean electro-motor power of a single Daniell. The induced currentgenerated in the secondary coil at eight centimeters distance from theprimary coil was of a strength sufficient to cause a pungent but quite bear-able sensation when the electrodes were
Carpenter's principles of human physiology . face, mouth and tongue, eyes, ears, &c, could be definitely anddistinctly excited. The method of stimulation he employed was the directapplication to the surface of the hemispheres of a pair of the blunted electrodesof the secondary spiral of Du Bois-Reymonds induction coil, connected with acell of the mean electro-motor power of a single Daniell. The induced currentgenerated in the secondary coil at eight centimeters distance from theprimary coil was of a strength sufficient to cause a pungent but quite bear-able sensation when the electrodes were placed on the tip of the tongue. Otherobservers have shown that similar effects can be produced by the employmentof chemical stimuli. From the results of his experiments on monkeys, Ferrierj*mapped out the following regions in their brain, the stimulation of which givesresults which may thus be briefly stated (see Figs. 246, 247):—1. Movementof the hind foot as in walking; 2. Complex movements of the hind leg, con- Fig. 246. Fig.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectphysiology, bookyear1
