Nervous and mental diseases . DISEASES OF THE FACIAL NERVE. 129 management. The early loss of faradic stimulability of the musclesgradually passes away, but voluntary motion returns before the faradiccurrent regains its control. Very frequently the paralyzed muscles willtwitch or even act in vigorous spasm as regeneration in the nerve re-stores its irritability. Those cases which last a month or two, or more,usually leave traces for the rest of life. They may be so slight as torequire careful scrutiny, or marked weakness may persist. Very excep-tionally the palsy is permanent. 10 11 r - -,i (
Nervous and mental diseases . DISEASES OF THE FACIAL NERVE. 129 management. The early loss of faradic stimulability of the musclesgradually passes away, but voluntary motion returns before the faradiccurrent regains its control. Very frequently the paralyzed muscles willtwitch or even act in vigorous spasm as regeneration in the nerve re-stores its irritability. Those cases which last a month or two, or more,usually leave traces for the rest of life. They may be so slight as torequire careful scrutiny, or marked weakness may persist. Very excep-tionally the palsy is permanent. 10 11 r - -,i ( ). AAA Fig. 49.—Same case six months later. 9 shows late contracture on the paretic side while the faceis at rest; 10, contracture in the lower half of the face increased by gently closing the eyes, and at thesame time shows weakness about left eye; 11, contracture increased by raising brows, showing over-action of zygomatic! and weakness of frontalis on left side. As the face recovers, in every instance the paretic side is likely tooveract for all moderate voluntary bilateral movements. It would seemthat the neuritis had left a certain nuclear irritability, so that a centralinfluence, acting equally on both sides, produces a greater effect on the for-merly paralytic muscles. This secondary overaction is most pronouncedin the lower half of the face, and often leads the patient to suppose thatthe sound side is becoming paretic. When once strongly developed itpractically remains for the rest of life, though slight degrees of it maypass away. While, therefore, the paralysis usually gets w
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