Cerebral Veins Anatomy

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Questions and Answers

Where do the branches of the ICA originate from?

On the upper surface of the corpus callosum (correct)

Around the lateral side of the midbrain

At the bifurcation of the basilar artery

In the callosal sulcus

What is the name of the artery that supplies the splenium?

Splenial artery (correct)

Callosal artery

Cortical artery

Central artery

At which level does the posterior cerebral artery originate from?

At the lateral side of the midbrain

At the lower border of the corpus callosum

At the upper border of the pons (correct)

At the upper border of the cerebrum

What is the direction of the posterior cerebral artery?

It passes backward around the lateral side of the midbrain Signup and view all the answers

Which artery does the callosal branches arise from?

Internal carotid artery Signup and view all the answers

What is the primary function of the deep cerebral veins?

Draining deep subcortical structures Signup and view all the answers

Which of the following arteries supplies the posterior 1/3 of the spinal cord?

Posterior spinal artery Signup and view all the answers

What is the origin of the paired anterior and posterior radicular arteries?

Spinal branches of vertebral, deep cervical, posterior intercostal and lumbar arteries Signup and view all the answers

How many internal cerebral veins are formed by the deep cerebral veins?

Two Signup and view all the answers

Which of the following is NOT a branch of the internal carotid artery?

Posterior spinal artery Signup and view all the answers

What is the primary blood supply to the anterior 2/3 of the spinal cord?

Anterior spinal artery Signup and view all the answers

Which artery supplies the labyrinth?

Labyrinthine artery Signup and view all the answers

What is the termination of the Basilar Artery?

At the upper border of the pons by dividing into 2 posterior cerebral arteries Signup and view all the answers

Which artery is formed by the union of the two vertebral arteries?

Basilar Artery Signup and view all the answers

What is the origin of the Anterior Cerebral Artery?

One of the two terminal branches of the internal carotid artery Signup and view all the answers

What is the course of the Basilar Artery?

Ascends in the basilar groove of the pons Signup and view all the answers

Which branch of the Internal Carotid Artery supplies the hypophysis?

Hypophyseal branch Signup and view all the answers

What is the origin of the Vertebral Artery?

First part of the subclavian artery Signup and view all the answers

What is the termination of the Vertebral Artery?

At the lower border of the pons by uniting with the basilar artery Signup and view all the answers

What is the branch of the Basilar Artery that supplies the pons?

Pontine branch Signup and view all the answers

What are the two terminal branches of the Internal Carotid Artery?

Anterior cerebral artery and middle cerebral artery Signup and view all the answers

Study Notes

Arterial Supply of the Brain and Spinal Cord

The brain is supplied by two systems: the vertebrobasilar system (two vertebral arteries and the basilar artery) and the internal carotid system (two internal carotid arteries)

Vertebrobasilar System

Composed of two vertebral arteries and the basilar artery
Vertebral artery:
- Origin: first part of the subclavian artery
- Course: 4 parts
- Branches: anterior spinal artery, posterior spinal artery, medullary branches, posterior inferior cerebellar artery (PICA), posterior meningeal artery
- Termination: unite to form basilar artery at the lower border of the pons
Basilar artery:
- Origin: union of the two vertebral arteries at the lower border of the pons
- Course: ascends in the basilar groove of the pons
- Branches: pontine branches (3 groups), anterior inferior cerebellar artery (AICA), labyrinthine, superior cerebellar artery, two terminal branches (posterior cerebral arteries)
- Termination: divides into 2 posterior cerebral arteries at the upper border of the pons

Internal Carotid System

Composed of two internal carotid arteries
Internal carotid artery:
- Origin: one of the two terminal branches of the common carotid artery at the upper border of the thyroid cartilage
- Course: divided into 4 parts: cervical part, petrous part, cavernous part, and supracavernous part
- Branches: caroticotympanic, hypophyseal branches, ophthalmic artery, posterior communicating artery, anterior choroidal artery, two terminal branches (anterior cerebral artery and middle cerebral artery)
- Termination: divides into anterior and middle cerebral arteries lateral to the optic chiasma

Branches of the Internal Carotid Artery

Cortical branches
Central branches
Callosal branches to the entire corpus callosum

Posterior Cerebral Artery

Origin: bifurcation of the basilar artery at the upper border of the pons
Course: passes backward around the lateral side of the midbrain to reach the splenium
Branches: cortical branches, central branches, splenial artery (supplies the splenium)

Venous Drainage of the Brain

Superficial cerebral veins:
- Middle cerebral vein
- Inferior cerebral vein
Deep cerebral veins:
- Two internal cerebral veins
- Great cerebral vein
- Two basal veins
- Anterior cerebral vein
- Middle cerebral vein
- Basal vein
- Great cerebral vein
- Straight sinus

Arterial Supply of the Spinal Cord

Derived from:
- Single midline anterior spinal artery (supplies anterior 2/3 of spinal cord)
- Two posterior spinal arteries (supply posterior 1/3 of spinal cord)
- Radicular arteries (paired anterior and posterior radicular arteries)
Radicular arteries originate from spinal branches of vertebral, deep cervical, posterior intercostal, and lumbar arteries

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Description

Test your knowledge of cerebral veins, including superficial, middle, and deep veins, and their relations to other brain structures. This quiz covers the anatomy of internal cerebral veins, basal veins, and sagittal sinuses. Brush up on your neuroscience skills!