Vertebral Artery- Parts

Vertebral artery is divided into the following four parts:

V 1 : Origin to transverse process of C6

V 2 : Thru f. transversaria of upper 6 cervical vertebrae.

V 3 : Sub- occipital triangle.

V 4 : Passes thru foramen magnum, pierces dura and enters subarachnoid space. 

Divisions of vertebral artery