CAMRT Radiography Practice Exam

Which artery is NOT involved in supplying blood to the brain?

1. Right internal carotid

2. Left vertebral artery

3. Right radial artery

4. Left internal carotid

The correct answer is: Right radial artery

The right radial artery is not involved in supplying blood to the brain. It primarily supplies blood to the forearm and hand, making it irrelevant to cerebral circulation. In contrast, the internal carotid arteries (both right and left) and the vertebral arteries are crucial components of the cerebral circulation system. The internal carotid arteries branch off into the middle and anterior cerebral arteries, vital for supplying blood to the brain's majority. The vertebral arteries also contribute blood by forming the basilar artery, which supplies the posterior circulation of the brain. Understanding the vascular anatomy of the head and neck illustrates the significance of these arteries in cerebral perfusion, confirming that the right radial artery plays no role in this system.