. A manual of diseases of the nervous system. it usually suffers, but I haveseen it unaffected, in a case in which the ext. carpi radialis was alsobut little affected, and Bernhardt has noted the escape of the supinatorin an otherwise complete paralysis from dislocation of the extensor palsy causes characteristic wrist-drop, and loss of thepower of extending the first phalanges of the fingers and the thumb(see p. 34). There is sometimes a gradation of palsy from the firstfinger, in which it is least, to the fourth, in which it is greatest (). The same gradation is seen in lea
. A manual of diseases of the nervous system. it usually suffers, but I haveseen it unaffected, in a case in which the ext. carpi radialis was alsobut little affected, and Bernhardt has noted the escape of the supinatorin an otherwise complete paralysis from dislocation of the extensor palsy causes characteristic wrist-drop, and loss of thepower of extending the first phalanges of the fingers and the thumb(see p. 34). There is sometimes a gradation of palsy from the firstfinger, in which it is least, to the fourth, in which it is greatest (). The same gradation is seen in lead palsy, &c. It is not easy toexplain. The action of the flexors is feeble, from the loss of antergicsupport; in most cases of complete palsy I have found the power offlexion reduced from this cause to one third of the normal. The lossof the power of supination is a grave inconvenience. If an object isgrasped firmly the arm becomes pronated. The patient tries to com-pensate for the loss by putting the elbow against the side and rotating. Fig. 53.—Paralysis of the musculo-spiral nerve; maximum extension ofwrist and fingers. The extension of the fingers progressively diminishesfrom the first to the fourth. (From a photograph.) the humerus. The pronators may ultimately become shortened. Theover-flexion of the carpus, and its deficient support by the extensor tendons, leads to a pro-minence of synovial sacs,and perhaps of the bones,at the back of the carpus(Fig. 55). In severe casesthe muscles waste, and themaximum circumference ofthe limb below the elbowmay be a quarter or half aninch less than on the otherside. The electrical reac-tions depend on the seve-rity of the lesion of the nerve; commonly there is well-marked degene-
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnervoussystem, bookye
