carotid sinuses

Main Entry: carotid sinus
Function: noun
: a small but richly innervated arterial enlargement that is located near the point in the neck where the common carotid arterydivides into the internal and the external carotid arteries and that functions in the regulation of heart rate and blood pressure

carotid sinus n.
A dilation of the common carotid artery at its bifurcation into the internal and external carotids, containing baroreceptors that when stimulated cause slowing of the heart, vasodilation, and a fall in blood pressure.

carotid sinus   A dilated region that is located at the point of bifurcation of the carotid artery and contains pressure receptors (called baroreceptors), which upon stimulation cause slowing of the heart rate, vasodilation, and a decrease in blood pressure.