. Electricity in diseases of the eye, ear, nose and throat . anic. In paraly-sis, contraction of a muscle is more readily affectedby an interrupted galvanic than by a faradic cur-rent. Beard and Rockwell explain this as follows:—Muscular fibre, in disease, undergoes degenerationthat makes it incapable of responding to the electricinfluence as rapidly as in health. Now the inter-ruptions of the faradic current are exceedinglyrapid, and they do not give the diseased muscle suf-ficient time to contract under its influence. The in-terruptions of galvanism may be made slowly, and,therefore, give th
. Electricity in diseases of the eye, ear, nose and throat . anic. In paraly-sis, contraction of a muscle is more readily affectedby an interrupted galvanic than by a faradic cur-rent. Beard and Rockwell explain this as follows:—Muscular fibre, in disease, undergoes degenerationthat makes it incapable of responding to the electricinfluence as rapidly as in health. Now the inter-ruptions of the faradic current are exceedinglyrapid, and they do not give the diseased muscle suf-ficient time to contract under its influence. The in-terruptions of galvanism may be made slowly, and,therefore, give the muscles time to contract. In healthy muscles, the interruptions of the gal-vanic current are not made as rapidly as is neces-sary to bring out their full contraction; while, the 110 ELECTRIC CUREENTS. interruptions of the faradic current are exceedinglyrapid, though, no more so than the healthy musclerequires. The power of the galvanic is probablyalso due to its greater chemical properties; and, this,in turn, to its longer continuance of action. Trous-. Pig. 76.—Combination Portable Englemann High Tension, theFaradic and the Galvanic—With an Automatic Rheotome—ToOperate With the Direct Current. seau caused an elevation of temperature of ° C. bya treatment of ten minutes. HIGH-FEEQUEiSrCY CUEEENT. Ill The stimulation, by faradism, of the vohmtaryand vaso-motor muscular fibres, doubtless increasesthe circulation, and, thereby, produces metabolicand tonic effects. PHYSIOLOGICAL EFFECTS OP THE HIGH FEEQUENCYCUEEENT. With the high frequency current, the patient isunconscious of any sensation or muscular contrac-tion, the vibrations of the current being too high(above 10,000 per second) to induce sensory or mo-tor reaction. DArsonval, by passing a currentthrough a saline solution in a cylinder and findingit as strong at the centre as at the periphery, dem-onstrated that the current does pass through thebody of the patient. The trophic changes producedby the coil are gre
Size: 1591px × 1571px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjecteye, bookyear1912
