Summary
The author compared the changes in the knee jerk occurring as a result of injection of hypertonic NaCl solution into the femoral vein, right auricle and various portions of aorta. Injection of hypertonic NaCl solution into the right auricle caused a more pronounced inhibition of the knee jerk than when it was injected into the aorta to supply the spinal cord. This suggested that the changes in the knee jerk caused by intravenous and intracardiac injection of the above substance was explained mainly by the reflex effect from the receptors of the lungs and heart, rather than by the direct action of this substance on the motor centers of the spinal cord.
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Osadchii, L.I. Participation of an interoceptive component in the mechanism of altered knee jerk upon intravascular administration of hypertronic solution. Bull Exp Biol Med 46, 795–799 (1958). https://doi.org/10.1007/BF00837790
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DOI: https://doi.org/10.1007/BF00837790