Diseases of the nervous system : a text-book of neurology and psychiatry . us type occurs as a sequel oftyphoid fever, smallpox, erysipelas, pneumonia, pleurisy, acute articu-lar rheumatism, parotitis, gonorrhea, dysentery, measles, Pasteurrabies treatment, whooping cough, and peripheral septicemia. In chronic tuberculosis mild grades of neuritis are frequent, and 286 AFFECTIONS OF THE PERIPHERAL NERVES severe polyneuritis is occasionally met with in the marantic rarely causes a polyneuritis, but it is known. Malaria isalso a rare cause. Leprosy causes a specialized form. PLEXUS
Diseases of the nervous system : a text-book of neurology and psychiatry . us type occurs as a sequel oftyphoid fever, smallpox, erysipelas, pneumonia, pleurisy, acute articu-lar rheumatism, parotitis, gonorrhea, dysentery, measles, Pasteurrabies treatment, whooping cough, and peripheral septicemia. In chronic tuberculosis mild grades of neuritis are frequent, and 286 AFFECTIONS OF THE PERIPHERAL NERVES severe polyneuritis is occasionally met with in the marantic rarely causes a polyneuritis, but it is known. Malaria isalso a rare cause. Leprosy causes a specialized form. PLEXUS PALSIES. Plexus or root palsies are comparatively rare. They occur moreoften in the upper extremity. Brachial plexus palsy, as Erbs birthpalsy, is the type. Lumbar plexus palsies rarely occur alone uncom-plicated by cord lesions, since they are usually produced by compres-sion, either resulting from tumor, fracture. Potts disease, etc. Sacralplexus palsies, however, are not infrequent. They make up theclassical cauda equina lesions, arising from the pressure of a tumor,. Fig. 136. -Sensory disturbances in seven cases of gunshot wounds of the brachialplexus. (Edinger.) from hemorrhage, fracture of the sacrum, bony disease of the lumbarvertebrae, pelvic tumor, abscess, etc. Brachial Plexus Palsies.—These most frequently arise from pullingor wrenching of the arms from accidents. Dislocation of the shoulder-joint can cause a plexus injury. Cervical rib is a rare cause, aneurismof the subclavian also. Gunshot wounds occasion them. (See ) The plexus is made up of the lower four cervical and the upper dorsalroot. Extraspinal as well as intraspinal lesions go to make up thesymptom picture. This picture is rarely complete, but as the fibersmaking up the plexus have a fairly definite arrangement so far asmuscular distribution is concerned, a study of the muscles involvedgives a key to the roots injured. The fifth and sixth cervical roots contain the fibers going to the PLEXUS P
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