75 Flashcards
What supplies the anterior circulation of the brain?
The anterior circulation of the brain is supplied primarily by the internal carotid arteries, which are branches of the common carotid arteries.
How do the internal carotid arteries enter the skull?
The internal carotid arteries enter the skull through the carotid canal and divide to become large arteries that supply the anterior brain.
What does the ophthalmic artery supply?
The ophthalmic artery supplies the eye and its contents.
What does the middle cerebral artery (MCA) supply?
The middle cerebral artery (MCA) supplies the lateral surfaces of the cerebral hemispheres, including the motor and sensory cortices.
What does the anterior cerebral artery (ACA) supply?
The anterior cerebral artery (ACA) supplies the medial surfaces of the frontal and parietal lobes, including parts of the primary motor cortex and somatosensory cortex.
What is the Circle of Willis?
The Circle of Willis is a circulatory anastomosis formed by the internal carotid arteries communicating with the posterior circulation (vertebrobasilar system) via the posterior communicating arteries. It ensures collateral circulation in case of an occlusion.
What is the clinical relevance of middle cerebral artery occlusion?
Middle cerebral artery occlusion may lead to hemiparesis or aphasia.
What is the clinical relevance of anterior cerebral artery strokes?
Anterior cerebral artery strokes are often accompanied by contralateral weakness of the leg due to its supply of the motor cortex.
What does the Circle of Willis prevent in case of arterial occlusion?
The Circle of Willis avoids extensive ischemic damage in case of arterial occlusion.
