Common carotid aery bifurcation is at
At the level of the upper border of the thyroid cailage, the aery ends by dividing into the external and internal carotid aeries. The right common carotid aery is a branch of the brachiocephalic aery. The left common carotid aery is branch of the arch of the aoa. Ref: BDC volume 3;sixth edition: pg 99
Thyroid cailage
Cricord cailage
C7
T2
Head and neck