. A treatise on nervous and mental diseases, for students and practitioners of medicine. Photograj)h of a case of inyelitis of the anterior cdrnua, showing paralysis of theleg type, of the left leg, in whicli the atroi)hy is masked by the fat of the limb,jlthough tJie droop of the toes can be seen. 216 NERVOUS DISEASES. The paralyzed muscles are flaccid. The atrophy is demonstrableby palpation and change in the normal size and contour of themuscles. The electrical changes consist of diminishing response ofthe motor nerve trunks to farad ism and galvanism, and subsequentlyof increasing response
. A treatise on nervous and mental diseases, for students and practitioners of medicine. Photograj)h of a case of inyelitis of the anterior cdrnua, showing paralysis of theleg type, of the left leg, in whicli the atroi)hy is masked by the fat of the limb,jlthough tJie droop of the toes can be seen. 216 NERVOUS DISEASES. The paralyzed muscles are flaccid. The atrophy is demonstrableby palpation and change in the normal size and contour of themuscles. The electrical changes consist of diminishing response ofthe motor nerve trunks to farad ism and galvanism, and subsequentlyof increasing response of the muscular nerve filaments to galvanism,as well as of an alteration in the healthy polar formula. Duringthe first week or ten days an increasingly strong faradic and galvanic Fig. Photograph of a case of myelitis of the anterior cornua, showing the upper arm typeon the left side, occurring twelve days after birth, in which there was absolute paralysisfor eleven months, and complete reaction of degeneration. current must be applied to the nerve-trunks to cause muscular con-traction ; and, if the myelitis of the anterior horn be severe enough,it may be difficult or impossible to obtain any response to the faradicor galvanic currents. However, the electrical phenomena are differ-ent with the muscular nerve filaments. Their response in the firstweek or ten days, like that of the nerve trunks, is less and less to thegalvanic and faradic currents; after this period the response to fara-dism continues to decrease, as in the nerve trunks, but the responseto galvanism begins to diminish—i. e., a weaker and weaker galvaniccurrent is required to produce a given muscular contraction, and thenormal reaction to the poles of the galvanic battery commences toalter. We have s
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