A laboratory manual of electrotherapeutics . fthese jars and this latter current can be utilized for thera-peutic applications without the disagreeable accompani-ment of sparks. The electrode for applying this currentcan also be placed in contact with the body and the varLous tissues and organs be brought under its influence withmore precision than is possible in the use of the spark or OF ELECTROTHERAPEUTICS. 137 spray. All modern static machines designed for therapeu-tic work are furnished with connections that permit the useof the static induced current. For the regulation of thiscurrent it
A laboratory manual of electrotherapeutics . fthese jars and this latter current can be utilized for thera-peutic applications without the disagreeable accompani-ment of sparks. The electrode for applying this currentcan also be placed in contact with the body and the varLous tissues and organs be brought under its influence withmore precision than is possible in the use of the spark or OF ELECTROTHERAPEUTICS. 137 spray. All modern static machines designed for therapeu-tic work are furnished with connections that permit the useof the static induced current. For the regulation of thiscurrent it is only necessary to regulate the discharge be-tween the prime conductors of the machine. A smallspark gap permitting frequent minute discharges will be at-tended by a similar frequency and feebleness in the staticinduced impulses. A wider separation of the prime con-ductors will result in heavier discharges at longer strength and frequency of the impulses of the staticinduced current is thus readily controlled. The nature of. Fig. 49. this induced current is similar in potential to that of theinducing current. The milliamperage depends upon theresistance offered in the circuit. It is in all probability,at times at least, oscillatory in character, although this re-mains to be determined with certainty. As to the physio-logical effects and the therapeutic applications of the sta-tic induced current we quote the words of Dr. Morton,whose rich experience in the use of this current gives to hisconclusions the weight of authority, 138 LABORATORY MANUAL Applied to a motor point, the static induced currentproduces most vivid and persistent muscular contractionwith a minimum of pain; applied farther back on the trunkof a motor nerve it throws large groups of muscles intocontraction. The contraction is peculiarly painless ascompared with that of faradic coils, and the influence isremarkably effusive. Accompanying a contraction of alarge group of muscles is a peculiar sens
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