Third pa of veebral aery is related to which marked area in the following diagram
Marked structures are as follows: A: Posterior arch of atlas; B: Foramen transversarium; C: Anterior arch; D: Superior aicular facet. Veebral aery has 4 pas: V1 - Preforaminal (from subclan aery to transverse foramen of C6) V2 - Foraminal (through the transverse foramina of C6 to C2) V3 - Extradural (from the transverse foramen of axis to the veebral canal) V4 - Intradural (from the veebral canal to the inferior border of pons) The given diagram is atlas veebra (superior view) and marker A shows the posterior arch of atlas, which is related to the third pa of veebral aery.
A
B
C
D
Head and neck blood supply and scalp