. A manual of diseases of the nervous system. ide. The extensors of the phalanges ofthe thumb are lost on the left side, and the extensor carpi radialis on the right. Allthe other forearm- and hand-muscles appear to be unaffected. The erectors of thespine are small and feeble; intercostals strong, diaphragm powerless, abdominalmuscles weak. In the legs the glutei and flexors of the knees seem normal, the flexorsof the hips weak, extensors of the knees small and feeble, muscles of the lower legrather small and feeble, but only the peronei are powerless, right-angled contractureof ankle-joint wi
. A manual of diseases of the nervous system. ide. The extensors of the phalanges ofthe thumb are lost on the left side, and the extensor carpi radialis on the right. Allthe other forearm- and hand-muscles appear to be unaffected. The erectors of thespine are small and feeble; intercostals strong, diaphragm powerless, abdominalmuscles weak. In the legs the glutei and flexors of the knees seem normal, the flexorsof the hips weak, extensors of the knees small and feeble, muscles of the lower legrather small and feeble, but only the peronei are powerless, right-angled contractureof ankle-joint with tendency to varus. Knee-jerk absent. Circumference (ininches) of upper arms (middle), R. 5^f, L. 5|; of forearm (maximum), each 8 ; ofthighs (minimum 2^ inches above patella), R. 10|, L. 9^; calves (maximum),R. lOf, L. 11. Electric irritability much lowered in all affected muscles to eachcurrent; in most, no contraction can be obtained. Sensation, the sphincters, andthe visceral functions are unaffected. * Landouzy and Dejerine, loc. 628 SPINAL CORD. lysis, the increase of interstitial tissue being wanting except in thosecases that really belong to this form, but in which the characteristicenlargement is absent, because no fat cells are developed in the miiltiplication of nuclei is, however, sometimes seen. The chiefchange is sometimes a simple narrowing of the fibres, with an ultimatedisappearance of the transverse striation. Degenerative changes arefrequently met with, indistinct striation or granular, fatty, or waxy transformation being seen here and there, alike in narrowed orenlarged fibres, and in those that retain their normal calibre ; occa-sionally fibres present longitudinal striation, fissuring, or vacuolation ;but in other cases, or in some muscles (especially in the juvenile form), a remarkable increase has been found in the size of fibres inexcised fragments,* even of muscles that are below the normal seems to show pathological enlargemen
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnervoussystem, bookye
