Diseases of the nervous system : a text-book of neurology and psychiatry . extremity. The platysma myoides, sternocleidomastoid, trapezius, and oblique musclesof the abdomen, gluteus medius, and tensor of the fascia lata have been removed. Theshading and cross-hatching follow the muscles and innervation as in Figs. 11 and 12.(After Dejerine.) UPPER EXTREMITIES 47 The interossei and lumbricales muscles of the hand flex the proximalphalanges, and extend the middle and terminal phalanges. The dorsal Inferior maxillaru I Post, branchcervical nerves Ci-njjN. Rectus anticusand longus Sc
Diseases of the nervous system : a text-book of neurology and psychiatry . extremity. The platysma myoides, sternocleidomastoid, trapezius, and oblique musclesof the abdomen, gluteus medius, and tensor of the fascia lata have been removed. Theshading and cross-hatching follow the muscles and innervation as in Figs. 11 and 12.(After Dejerine.) UPPER EXTREMITIES 47 The interossei and lumbricales muscles of the hand flex the proximalphalanges, and extend the middle and terminal phalanges. The dorsal Inferior maxillaru I Post, branchcervical nerves Ci-njjN. Rectus anticusand longus Scaleni levat. anouli plexN. ang. Cl-5 N. subscapulu) isBrachial plex ui>Circumflex L -Brachial Ih t as Lower subscapularBrachial plexus Musculo cutaneousradial Inferior V Stylohyoid ( VII Posterior digastric [ IX Inferior dental VPharyngeal IX, X, XILongus colli Int. deso. branch C2,iiand Hypoglossus XII AnteriorthoracicBrach ial plexus Ili^ achial pilex as. Musculo cutaneousBrachial plexus Ant. thoracic int. Intercostal andHyjjogastric 5-12 Intercostal, genito-crural plexus I 11 Superior /I I // gluteal , /j / /Jhucral plexus CruralLumbar plexus\H ObiuratorLumbar C> ui alLumbar 2>lexus SciaticSacral pleafus Fig. 14.—Peripheral innervation of the lateral aspect of the head, neck, trunk, andupper extremity. Markings and cross-hatchings, as in previous figure, to indicate thevarious innervations. Figures , , , , and as in previousdiagrams. (After Dejerine.) interossei adduct, the palmar adduct, the fingers from and towarda longitudinal line drawn through the center of the middle finger. 48 METHODS OF NEUROLOGICAL EXAMINATION Test by making the patient separate and approximate the fingers,and flex the proximal phalanges, keeping the middle and terminalphalanges extended. Paralysis of these muscles causes
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