Organic and functional nervous diseases; a text-book of neurology . oducecontractions. Frequently all faradic excitability is lost, and then themuscles react to a galvanic current only. In this condition it may re-quire a very strong galvanic current to produce contraction, and thisfact is quite patli()gnornonic of ncuiitis, for in anterior poliomyelitis,where the muscles respond to galvanism only, it does not require a 202 MULTIPLE NEVniTlS. strong current to cause a motion until some months after the action of the different poles is not uniform. In many cases thecontraction of t
Organic and functional nervous diseases; a text-book of neurology . oducecontractions. Frequently all faradic excitability is lost, and then themuscles react to a galvanic current only. In this condition it may re-quire a very strong galvanic current to produce contraction, and thisfact is quite patli()gnornonic of ncuiitis, for in anterior poliomyelitis,where the muscles respond to galvanism only, it does not require a 202 MULTIPLE NEVniTlS. strong current to cause a motion until some months after the action of the different poles is not uniform. In many cases thecontraction of the muscle when stimulated with the positive pole isgreater than when stimulated with the negative pole, and the contrac-tions may be sluggish. Then the reaction of degeneration is present;but in some cases the normal condition is found, and the negative poleproduces stronger contractions than the positive pole. If the muscleswhich are not paralyzed be tested the same electrical changes mayoften be discovered in them. A loss of faradic irritability and a Fig. Dropped feet in multiple neuritis. marked decrease in the galvanic irritability of the muscle and nerveare, therefore, important symptoms of multiple neuritis, and, as thedisease goes on to recovery, a gradual increase in the galvanic irrita-bility occurs, a fact which is often of much aid in prognosis if care-ful measurements of the strength of current used be made by thegalvanometer. As a result and accompaniment of the paralysis abnormal positionsare assumed by the limbs. The dropped wrist and dropped foot arequite characteristic of multiple neuritis. (Figs. 102 and 103.) Theyare in part due to the action of gravitation and in part to the unop-posed action of muscles which are not very weak. But other deformi-ties may be present. In a few cases there have been extreme contrac-tures of all the extremities in flexed position. When the legs are thusflexed the posture is at first voluntarily assumed to relieve the pain
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