Medical and surgical therapy (1918) (14759046146)

Identifier: medicalsurgicalt02good (find matches)
Title: Medical and surgical therapy
Year: 1918 (1910s)
Authors: Goodwin, T. H. (Thomas Herbert), b. 1871, ed Keogh, Alfred, Sir, 1857-1936, ed
Subjects: Medicine, Military Military Medicine Surgery
Publisher: New York : D. Appleton
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons



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amount importance in electro-diagnosis, and is thechief characteristic of the reaction of degeneration. Reaction of degeneration may be either complete orpartial. Complete reaction of degeneration is indicated inthe nerve by— Faradic and galvanic irritability being abolished. In the muscle by— 1. Faradic irritability being abolished. 2. Galvanic irritability being increased or decreased. 3. (a) Response to galvanic stimulation is sluggish ;(h) normal formula ; polar equality or the invertedformula. When the lesions are less marked, the reactions arenot so clearly defined, and the reaction of degenerationwill then be partial. Partial reaction of degeneration presents the follow-ing features : — In the nerve— Decreased faradic and galvanic irritability. In the muscle— 1. Decreased faradic irritability. 2. Decreased or increased galvanic irritability. 3. (a) Sluggish contraction ; (&) normal formula ;polar equality or the inverted formula. 20 CLINICAL FORMS OF NERVE LESIONS
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o COG METHOD OF EXAMINATION 21 Text - books attach an importance to the in-verted formula which is quite unsupported byexperience. It is now known to be of little value,and we regard slowness of contraction as the onlyvaluable evidence of degenerated muscle. Huet and Bourguignon, Laquerriere and Delherm,Delherm and M. Grunspan have all demonstratedthat the myotonic reaction should be incorporatedin the reaction of degeneration. This myotonicreaction has hitherto only been observed in Thomsensdisease and in the myopathies. But this reactionoccurs in a peculiar manner in the reaction of degenera-tion : it always seems to disappear at the opening ofthe circuit, and may be observed both in completeand partial reaction of degeneration. Illustrations It is essential to record in graphic form the ana-tomical and physiological functions of the differentnerves. To the wpjper extremity belong— ^^^I^^H the median nerve, drawn in dead black. the musculo-spiral nerve, drawn in fine close lines f