. The elements of physiological physics: an outline of the elementary facts, principles, and methods of physics; and their applications in physiology. Biophysics. 64 PHYSIOLOGICAL PHYSICS. [Chap. vir. a white cord passing down between the muscles. Keeping he muscles separate, with the point of a scalpel, by a slight stroke here and there, and without touching the nerve, divide the fascia in which the nerve is imbedded till it is completely shown from its division just behind the knee-joint up to the place where it disappears between ilium and coccyx. With scissors cut through the ilium and the
. The elements of physiological physics: an outline of the elementary facts, principles, and methods of physics; and their applications in physiology. Biophysics. 64 PHYSIOLOGICAL PHYSICS. [Chap. vir. a white cord passing down between the muscles. Keeping he muscles separate, with the point of a scalpel, by a slight stroke here and there, and without touching the nerve, divide the fascia in which the nerve is imbedded till it is completely shown from its division just behind the knee-joint up to the place where it disappears between ilium and coccyx. With scissors cut through the ilium and the muscles of the back above it, keeping well to the outer side, and, by turning over the flap left connected with the vertebral column, the nerves from which the sciatic is derived will be seen. By clearing away the connective tissue a long stretch of nerve from the lumbar region right down to the knee is obtained. Reflect this stretch of nerve over the gastrocnemius muscle ; then, holding by the foot, with the scalpel scrape the femur clean of muscle, and cut it through just below the head. With the point of the scalpel pierce a small slit, to admit the hook of the muscle telegraph, through the tendo Achilles. Separate the tendon from the foot below this, and by pulling on the tendon separate the gastrocnemius from the muscles below it up to the knee. Snip through the leg bones just below the knee, avoiding all injury to the nerve. Thus there is obtained the gastrocnemius M (Fig. 36), with the long piece of nerve N at- tached, the whole depending from the Fig. 36.— Nerve- femur F, by means of which the Muscle Pre- -, •. -, • ,-, ,. paration. muscle can be clamped in the torceps of the muscle telegraph, while the hook of the telegraph can be passed through the opening I in the tendon. Difference between continuous, inter- rupted, and induced currents.—This may be studied with 'the aid of the muscle telegraph. Make. Please note that these images are extracted from scanned
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