The laws and mechanics of circulation, with the principle involved in animal movement . round the vessel. (Oc, 3 ; obj., 8.)—Klein. have finished ; notably : It is a well-known fact that any cir-cumstance which should suddenly reduce arterial pressurewould accentuate dicrotism, bringing it out more conspicuouslyin all of the tracings. Now, then, as arterial pressure increasescirculation in the tissues, it follows that any reduction ofpressure would call for corresponding compensation, inorder to maintain circulation in the tissues up to the norm,and which can only be done by increasing the rhy
The laws and mechanics of circulation, with the principle involved in animal movement . round the vessel. (Oc, 3 ; obj., 8.)—Klein. have finished ; notably : It is a well-known fact that any cir-cumstance which should suddenly reduce arterial pressurewould accentuate dicrotism, bringing it out more conspicuouslyin all of the tracings. Now, then, as arterial pressure increasescirculation in the tissues, it follows that any reduction ofpressure would call for corresponding compensation, inorder to maintain circulation in the tissues up to the norm,and which can only be done by increasing the rhythmicalexpansions and contractions in the vessels, and hurrying res-piration ; hence the quick respiration in these cases and the NERVES CONNECTING WITH THE CELL-BROOD. 179 accentuation of dicrotism, which are undoubtedly producedthrough the rhythmic centre and reflex action propagated fromthe cell-brood. Concerning the Arrest of Pulsation on the Distal Side ofAneurismal Tumors.—Since the central nervous system oper-ates the movements in the vessels, the force being propagated m. Fig. 59.—Mesentery of Frog prepared in Chloride of Gold, showing the distribution ofnon-medullated nerve fibres to a capillary blood-vessel, a. b, A coarse non-medul-lated nerve fibre giving off finer branches, which form a plexus around the of these finer fibres belong to the wall of the vessel. (Oc, 4 ; obj., 8.)—Klein. from the medulla oblongata, or the same as in the voluntarymovements with which the vessels are coordinated, this wouldexplain the arrest of pulsation in the vessels on the distal sideof aneurisms, which distends the nervous plexuses, and by 180 CARDIAC TRACIXGS DECEPTIVE. putting them upon the stretch would inhibit the passage ofthe currents, while the force in the heart is absorbed in theaneurismal expansions, thus taking off nervous and cardiacforce at one and the same time; hence, the cessation of thepulsations. Furthermore, we have seen that the force in th
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