Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
27 Cards in this Set
- Front
- Back
Path of vertebral arteries to brain? |
- Branch from subclavian a.
- Enter through foramen magnum - Run along ventral surface of spinal cord and medulla |
|
Where do vertebral arteries anastomose at?
|
Near junction of medulla and pons --> Basilar a.
|
|
Branches of Vertebral Arteries?
|
- Anterior Spinal A.
- Posterior Inferior Cerebellar Arteries (PICA) |
|
What medial branches of vertebral artery anastomose on midline? Supplies?
|
Anterior Spinal Artery - supplies medial medulla (medullary pyramids) and anterior 2/3 of cervical spinal cord
|
|
What branches off of vertebral artery laterally? Supplies?
|
Posterior Inferior Cerebellar Arteries (PICA) - branch inferior to anterior spinal artery - supplies inferior surface of cerebellum and lateral part of rostral medulla
|
|
Regions of brain supplied by vertebral arteries and branches?
|
- Cervical spinal cord (anterior 2/3 by ASA, posterior 1/3 by PSA)
- Medulla (anterior and medial areas including medullary pyramids) - Medulla (lateral by PICA) - Inferior surface of cerebellum (by PICA) |
|
Across what structure does Basilar artery run?
|
Ventral surface of pons (at upper border bifurcates to form two posterior cerebral arteries)
|
|
Branches of Basilar Artery?
|
- Posterior Cerebral aa (PCA)
- Superior Cerebellar aa (SCA) - Pontine aa - Labyrinthine / Internal acoustic aa - Anterior inferior cerebellar aa (AICA) |
|
Basilar artery supplies?
|
- Thalamus
- Midbrain - Pons |
|
Arteries surrounding CN III?
|
- Anteriorly: Posterior Cerebral aa.
- Posteriorly: Superior Cerebellar aa. |
|
Posterior Cerebral A. supply?
|
- Midbrain
- Posterior part of brain (occipital lobes) - Thalamus - Globus Pallidus |
|
Superior Cerebellar A. supply?
|
- Superior surface of cerebellum
- Parts of midbrain - Lateral part of middle pons |
|
Where do Labyrinthine / Internal Acoustic arteries branch from? Supply?
|
- Branch from lateral aspect of basilar a.
- Inferior to pontine arteries, yet superior to AICA - Supply inner ear |
|
Where do AICA branch? Supply?
|
- Lateral aspect of basilar artery just superior to anastomoses of vertebral aa.
- Inferior surface of cerebellum, lateral part of caudal pons |
|
Regions of brains supplied by Basilar A. and its branches?
|
- Cerebellum
- Midbrain - Pons - Thalamus - Visual Cortex (Occipital lobe) - Inner ear |
|
Branches of Internal Carotid A.?
|
- Anterior Cerebral aa (ACA)
- Middle Cerebral aa (MCA) - Anterior Communicating a - Posterior Communicating a |
|
Branches of Anterior Cerebral aa?
|
- Pericollasal artery (atop corpus callossum in callosal sulcus)
- Callosomarginal artery (follows cingulate sulcus) |
|
Anterior cerebral aa. supply?
|
- Medial aspect of brain (frontal and parietal lobes, cingulate gyrus)
- Perforating branches supply basal ganglia |
|
Middle Cerebral aa. supply?
|
Lateral aspect of brain (frontal lobe, parietal lobe, insula, temporal pole, perforating branches supply basal ganglia and internal capsule)
|
|
Posterior communicating aa. supply?
|
- Optic chiasm
- Parahippocampal gyrus - Interpeduncular region - Crus cerebri - Thalamus |
|
Which artery runs along superior surface of corpus callosum in callosal sulcus?
|
Pericallosal a. (from ACA)
|
|
Which artery follows the cingulate sulcus?
|
Callosomarginal a. (from ACA)
|
|
Before the vertebral arteries enter the cranium, what openings do they pass through in cervical vertebrae?
|
Transverse Foramina
|
|
CN III emerges between what arteries?
|
Posterior Cerebral a.
Superior Cerebellar a. |
|
Which vessel supplies the lateral surface of the cerebrum including the primary motor and primary sensory cortices?
|
Middle cerebral artery
|
|
Anterior Inferior Cerebellar a. (AICA) is located near which CN?
|
CN VI (Abducent)
|
|
Rupture of a cerebral artery from a berry aneurysm leads to what type of hemorrhage?
|
Subarachnoid
|