jugular sinus

jug·u·lar si·nus

, sinus jugularis
one of three enlargements of the jugular veins; the external jugular sinus is between the two sets of valves; the internal jugular sinuses are at the origin (superior bulb) and near the termination (inferior bulb).
References in periodicals archive ?
demonstrated in their study, cardiac venous pulsation from the dominant vein can strike the jugular sinus and cause expansion of the jugular bulb.