232 



DISEASES OF THE NERVOUS SYSTEM 



disturbances of the same. The faradic or the open circuit can be used. 

 One electrode is placed on the body, generally along the spine and the 

 other is placed on the muscle to be stimulated. The first electrode, 

 that is placed along the spine should be of large size and the other that 

 is to be placed on any particular nerve of muscle, must be comparatively 



31 3^ 33 3*3^ 



Fig. 93. — Motor centre points of the clog (after Nahrich): 1, caninus muscle; 2, levator; labii super- 

 ioris; 3, orbicularis oris; 4, levator naso labialis; 5, currugator supercilii and orbicularis palpebrarum; 

 6, corrugator supercilii and orbicularis palpebrarum; 7, orbiculo-palpebralis nerve; 8, masseter; 9, 

 zygomaticus muscle; 10, superior lateral retractor of the ear; 11, sterno-hyoideus; 12, sterno-cephalicus; 

 13, trapezius; 14, omotransversarius; 15, cleidocervicalis; 16, thoracic portion of the trapezius; 

 17, scapular portion of the deltoid; 18, axillary nerve; 19, acromian part of the deltoideus; 20, anconeus 

 longus; 21, anconeus lateralis; 22, ramus profundus with radial nerve; 23, extensor digitalis communis; 

 24, adductor poUicis longus; 25, extensor digitalis lateralis; 26, extensor carj^i ulnaris; 27, anconeus 

 brevis; 28, cutaneus maximus; 29, latissimus dorsi; 30, obliquus abdominalis externus 31, illiohy- 

 pogastric nerve; 32, illioinguinalis; 33, sartorius; 34, tensor fascia lata; 35, gluteus medius 36, gluteus 

 superficialis; 37, biceps femoris; 38, semitendinosus; 39 peroneus nerve; 40, extensor digitalis 

 lateralis; 41, peroneus brevis, 42, tibial nerve. 



small so as not to cover more than the part to be stimulated. The 

 electrode must be covered with linen or woolen cloth and moistened with 

 a weak solution of common salt. The reflex movements are prompter 

 when the electrode is placed on the so-calletl motive points which (Fig. 93) 

 will give some idea of their location. 



When a muscle is in normal condition it will answer promptly, when 



