ANAT 312 Lecture Notes - Lecture 4: Anterior Inferior Cerebellar Artery, Superior Cerebellar Artery, Posterior Spinal Artery

• School: Queen's University
• Department: Anatomy and Cell Biology
• Course: ANAT 312
• Professor: Leslie W Mac Kenzie

Document Summary

Blood supply, drainage and the blood brain barrier (bbb) (required reading: nolte: the human brain - chapter 6: 122-147) Blood supply (1) internal carotid (2) and vertebral arteries (2). Part of the four main arteries that enter the skull to form cerebral artery supply. (2) **80 % internal carotid and 20% vertebral. The internal carotid artery originates from one of the two branches of the common carotid artery coming off of the aorta. 6 cervical vertebrae through the foramina in the transverse processes. The internal carotid artery enters the base of the skull via the carotid canal. It then proceeds to emerge from the foramen lacerum and from there immediately enters the cavernous sinus. There it follows an s shaped course and emerges behind the anterior clinoid processes and just lateral to the optic chiasm. The vertebral arteries enter via the foramen magnum. The internal carotid artery bifurcates giving rise to the anterior (2) and middle (1) cerebral arteries.