A manual of practical medical electricity - the Röntgen rays and Finsen light (1902) (14803550713)

Identifier: manualofpractica00turn (find matches)

Title: A manual of practical medical electricity : the Röntgen rays and Finsen light

Year: 1902 (1900s)

Authors: Turner, Dawson

Subjects: X-Rays Electrophysiology Electrosurgery Electric Stimulation Therapy Electrotherapeutics X-rays Electrophysiology Electrosurgery

Publisher: New York : William Wood & Company

Contributing Library: Francis A. Countway Library of Medicine

Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

Text Appearing Before Image:

Peroneal nerve. Ext. head of gastroc-nemius.Soleus. Extensor longus digi-torum communis. Peroneus brevis.Soleus. Flexor longushallucis. Extensor communisdigitorum brevis. Abductor minimidigiti. Fig. io8.—Motor Points of Outer Surface of Leg (Ziemssen). present no simple instrument wherewith to measure thecurrent - strength of induced alternating currents. Acomparison of the reactions of the two sides will be ofmost value, particularly if the galvanometer, used subse- (Electro-Diagnosis 211 quently with the constant current, shows that there is nogreat difference in the relative body resistances. Greateraccuracy will be obtained if the chief resistances of thebody have been previously measured by Kohlrauschsmethod. By the term superexcitability, we mean that the M. gastrocnemius internusII. soleus M flex, digitor. commua. long.. M. abductor polliois ,

Text Appearing After Image:

Fig. 109.—Motor Points of Inner Surface of Leg (Ziemssen). nerves and muscles are stimulated by currents of a strengthinsufficient (with the coils too far apart) to stimulatenormal tissues, or that the muscles react more activelyand energetically to currents of the same strength ; thiscondition usually also implies rapid exhaustion. It ismet with chiefly in conditions of irritation, where thereflex excitability is also heightened, as in chorea, tetany,. 14—2 212 A Manual of Practical Medical Electricity spastic paralysis, early stage of locomotor ataxy, andhysterical paralysis. Galvanic Superexcitability. If a muscle reacted to an interruption when the current-strength was I m.a. or less, and particularly if this con-traction were prolonged, and showed a tendency to be Eectus Abdominis iCntercostal Nerves) i

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1902

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