. A manual of diseases of the nervous system. FlO. 160.—Modeof obtaining extension of hipsin pseudo-hypertrophic paralysis. F, ful-crum of the lever formed by the femur. P,mean position at which the power is appliedby contraction of the quadriceps , position of weight in the ordinary modeof rising, w, the place to which part ofthe weight is transferred by putting handson Pia. 161.—Mode of rising from theground in pseudo-hypertrophicparalysis. extensors of the knee and the extensors of the hip. The musclesbelow the knee usually retain considerable power for a long time, andthe
. A manual of diseases of the nervous system. FlO. 160.—Modeof obtaining extension of hipsin pseudo-hypertrophic paralysis. F, ful-crum of the lever formed by the femur. P,mean position at which the power is appliedby contraction of the quadriceps , position of weight in the ordinary modeof rising, w, the place to which part ofthe weight is transferred by putting handson Pia. 161.—Mode of rising from theground in pseudo-hypertrophicparalysis. extensors of the knee and the extensors of the hip. The musclesbelow the knee usually retain considerable power for a long time, andthe extensors of the ankle fail before the flexors. In the upper limbsthe depressors of the arm are usually alone weakened during the earlyperiod of the disease, but subsequently the shoulder muscles suffer. PSEdDO-HYPKRTROPHIC MUSCULAR PARALYSIS. 573 then the triceps and the biceps, while the muscles that move the handcommonly retain good power to the last. The distribution of weakness in the legs causes certain peculiaidefects of movement which are very characteristic, and some are evenall but pathognomonic of the disease. The difficulty in going upstairsis especially due to the weakness of the extensors of the knee and defect of the extensors of the hip causes the gait to have apeculiar oscillating character, in which the body is so inclined as tobring the centre of grav
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