. Student's manual of electro-therapeutics, embodying lectures delivered in the course on therapeutics at the Woman's medical college of the New York infirmary. the propermaintenance of their healthy structure. Func-tional activity of a muscle is occasional vigorouscontraction. When muscles remain idle forsome weeks, slight degenerative changes setin, which, if the disuse last long enough, go onto the production of some fatty degeneration,absorption, and consequent atrophy (wasting)and paresis (weakness). Such muscular changesare seen after long detention of an extremityon a splint for fractur
. Student's manual of electro-therapeutics, embodying lectures delivered in the course on therapeutics at the Woman's medical college of the New York infirmary. the propermaintenance of their healthy structure. Func-tional activity of a muscle is occasional vigorouscontraction. When muscles remain idle forsome weeks, slight degenerative changes setin, which, if the disuse last long enough, go onto the production of some fatty degeneration,absorption, and consequent atrophy (wasting)and paresis (weakness). Such muscular changesare seen after long detention of an extremityon a splint for fractures, operative wounds,various inflammatory troubles, and rheumatism;after long immobility of a part because of thepresence of pain ; and in the course of chronicarthritic or synovial disease. Those acquaintedwith the use of electricity have noticed that theelectrical reactions in these cases were slow,but only quantitatively not qualitatively changed,i. e., the normal formula is retained ; faradic ex- MUSCULAR SYSTEM. 65 citability of nerve and muscle is retained, butlessened. All contractions are retarded andslow, showing a tendency toward Fig. 16.—Myograms from case of long disuse of hand from rheu-matism and splint ; reduced one third ; contractions of abductorindicis. a = cacc (nerve current), 27 cells, b = anoc (nerve current), 42 cells, c =fc (nerve current), with cent, secondary coil, d = cacc (muscle current),42 cells, e = ancc (muscle current), 47 cells, f = fc, with 2 cent, of sec-ondary coil. Changes of reaction which are insignificant tothe naked eye are made very manifest whenamplified and made graphic by myograms. 66 ELECTRO- THERAPE UTICS. Such cases are best treated, in conjunctionwith passive movements and friction, by mild,labile faradic, unless labile galvanic applicationsproduce better contractions and are , of course, must be taken not to confusethese with cases where real injury is donenerves, but in that case, of course,
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