Blood brain barrier, blood supply, CSF, meninges Flashcards
What is perfusion?
delivery of blood to tissues
What areas does the basilar artery supply blood to?
the posterior portion of the circle of Willis (a.k.a. posterior cerebral artery or PCA) and the posterior and inferior portions of the brain.
The basilar artery consists of
left and right vertebral arteries of the heart’s aorta
The _______ joins the basilar artery to the anterior portion of the distribution of blood in the circle of Willis.
posterior communicating artery
What arteries from the heart enter the brain?
internal carotid arteries and vertebral arteries
The internal carotid arteries supply blood to which arteries of the circle of Willis?
anterior cerebral arteries and middle cerebral arteries
The ______ joins the anterior cerebral arteries and middle cerebral arteries.
anterior communicating artery
What are the 3 main paired blood vessels that supply most of the oxygenated blood to the brain?
ACA (anterior cerebral artery), MCA (middle cerebral artery), and PCA (posterior cerebral artery)
What is a watershed region?
area where different regions of brain tissue can receive blood from the ACA, MCA, and PCA.
Which cerebral artery supplies blood to Broca’s area?
middle cerebral artery
Which cerebral artery supplies blood to Wernicke’s area?
middle cerebral artery
Which cerebral artery supplies blood to the lateral and medial surfaces of the prefrontal cortices
anterior cerebral artery
Which cerebral artery supplies blood to the lateral and medial surfaces of the supplementary motor area?
anterior cerebral artery
Which cerebral artery supplies blood to parts of the primary motor strip?
middle cerebral artery
Which cerebral artery supplies blood to the primary somatosensory cortex?
middle cerebral artery
Which cerebral artery supplies blood to the visual corticies?
posterior cerebral artery
Which cerebral artery supplies blood to the temporal lobe?
posterior cerebral artery
Which cerebral artery supplies blood to the superior and medial parietal lobes?
posterior cerebral artery
What is the circle of Willis?
A network of blood vessels found on the inferior (bottom) side of of the brain that supplies blood to it. it receives oxygenated blood from the basilar arteries and internal carotid arteries and sends it to the cerebrum via cerebral arteries
What artery supplies the anterior portion of the spinal cord?
anterior spinal artery
What artery supplies the posterior portion of the spinal cord?
posterior spinal artery
What parts of the brainstem and/or spinal cord does the basilar artery supply blood to?
the anterior 1/3 of the midbrain and anterior-medial 2/3 of the pons
What parts of the brainstem and/or spinal cord does the vertebral artery supply blood to?
the medulla: posterior medial of the rostral portion and medial 1/3 of the caudal portion
What is the blood brain barrier?
protective mechanism that prevents large viruses, pathogens, and drugs from entering the brain
What are the meninges?
3 layers of tissue that surround the external and medial sections of the cerebrum, cerebellum, brainstem, and spinal cord
What is the order of the meninges from superficial (surface) to deep?
dura mater, arachnoid membrane, and pia mater