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The Carotid Sinus and the Cerebral Circulation.

Arch Intern Med (Chic). 1936;57(1):236-237. doi:10.1001/archinte.1936.00170050244017.
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Ask-Upmark has approached the problem of the relationship between the carotid sinus and the cerebral circulation from three angles: anatomic, experimental and clinical. Following an extensive general introduction, he describes the dissection of the carotid sinus in twenty-seven species of mammals, reptiles, amphibia and birds. The sinus is located at the origin of the internal carotid artery or its homologs. In the absence of the internal carotid artery the site is the base of the occipital artery. The sinus is innervated chiefly by the glossopharyngeal, partially by the vagus and the sympathetic, and rarely by the hypoglossal, nerves. The glossopharyngeal nerve is especially important, judging from the morphologic and physiologic evidence presented. Embryologically, this is to be expected, since the sinus is probably derived from the arterial structures of the third branchial arch, which lies in the domain of the ninth nerve. It is regrettable that microscopic studies were not


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