. The medical and surgical uses of electricity. . This is especially thecase with the sterno-cleido-mastoid muscle, which on being touched nearits centre contracts with a painful jerk. The same is true, to a less ex-tent, of the trapezius, the flexors of the arm, and of the peronei all parts where no muscular contractions are produced, the sensitive-ness of the surface of the body depends on the quality and position of thesensory nerves, and bears a pretty constant relation to its sensitiveness toordinary mechanical irritation. Thus it will be observed that the parts which are most
. The medical and surgical uses of electricity. . This is especially thecase with the sterno-cleido-mastoid muscle, which on being touched nearits centre contracts with a painful jerk. The same is true, to a less ex-tent, of the trapezius, the flexors of the arm, and of the peronei all parts where no muscular contractions are produced, the sensitive-ness of the surface of the body depends on the quality and position of thesensory nerves, and bears a pretty constant relation to its sensitiveness toordinary mechanical irritation. Thus it will be observed that the parts which are most sensitive to ablow or fall, or to any mechanical injury—as the head, face, or surface ofthe bones, clavicle, sternum, scapula, patella, etc.—are likewise markedhighest in the scale of sensitiveness to the current. To guard against error it is necessary— I. To use always the same electrode and the same direction of thecurrent; therefore the negative pole should be kept at the feet during theentire sitting. 262 ELECTRO-THERAPEUTIC supercilii. Superior cervical gauglion sympathetic. Interior maxillary nerve. Ster no-clei do-m astoid. Sterno-cleido-mastoid. Inferior cervical ganglion sympathetic. Phrenic nerve. Brachial plexus. Pectoral muscles. Biceps muscle andBrachialis internu Median nerve. Palmar is longus. Radlalus internus. Flexor digitorum profundus. Flexor digitorum sublimis. Flexor digitorum sublimis II., III., digit. Ulnar nerve. Flexor poUicis lougus. Median nerve. Abductor polHcis brevis. Volar branch ulnar nerve. Opponens pollicis. Lumbricales, I., 11., III., IV. femoris. Vastus externus. Crural nerve and vastus jnterDus, Vastus extermis. Peroneal nerve. Peroneuslongus Tibialis anticus, and exten. dig. com brevis Flexor die. comExtensor lialhu: longus. Tibial I Extensor digitorum digitorum com. pedis dorsales. Fig. 53.
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