Morphology of the vascular pressure receptors in dogs after clinical death
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Summary
The author studied the morphology of the pressure receptors in the arch of aorta sinus, the orifices of the pulomonary veins, venae cavae in 19 dogs at various intervals (from several hours to 1 month) after a 5-minute clinical death. Silver impregnation of the nerve elements according to Campos and myelin staining after Spielmeier was used in this work. Neurohistological examination yielded the following results. The signs of reactive condition and destruction in the large myelinated nerve fibers and their receptor apparatus noted in the experimental animals in the mentioned vascular reflexogenic zones were the same as in the healthy (control) animals. There were no other morphological signs (or changes) in addition to the general picture of afferent innervation of the vascular reflexogenic zones under normal conditions. The data obtained lead to the conclusion that vascular pressure receptors are either insensitive or very resistant (preserving their structure) to the action of such extreme factors as clinical death and concomitant hypoxia.
Keywords
Public Health Experimental Animal Normal Condition Nerve Fiber General PicturePreview
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