CNS arteries

Question 1

Anterior choroidal artery

Answer 1

Off of the ICA, runs posterior. Important NOT only for the choiroid but for VISION and MOTOR control as well.

Courses along the optic tract to lateral geniculate bodies, then enters the choroidal fisure on the superior/medial aspect of the hippocampal gyrus to enter the choroid plexus of the lateral ventricle in the temproal horn.

Question 2

Branches of the ACA

Answer 2

A1: Anteromedial Central Artery/ Medial lenticulostriate artery

A2:
Recurrent Artery of Heubner / Distal medial striate artery –>internal capsule
Medial Frontal Basal artery (Orbitofrontal Artery)
Polar Frontal Artery (Frontopolar Artery)

A3: (is the Pericallosal artery)
 Callosomarginal artery
 Superior internal parietal artery
 Inferior internal parietal artery
 Precuneal artery

Irrigates the: Anterior portions of the Basal ganglia, and the medial portion of the entire Cerebrum up to the Precuneus.

Question 3

Branches of the MCA

Answer 3

M1: The sphenoidal segment
Anterior Choroidal Artery
Anterolateral central arteries (Lateral lenticulostriate arteries)

Question 4

What veins unite to form the Internal Cerebral Vein

Answer 4

• The Choroidal vein, from CP of both the lateral and third ventricles
• The Thalamostriate Vein, draining the thalamus and Corpus Striatum
• The Vein of Septum Pellucidum

Question 5

What veins unite to form the Great Cerebral Vein of Galen

Answer 5

The Basal veins of Rosenthal and the Internal Cerebral veins.

Question 6

Tela Choroidea

Answer 6

The pia mater surrounding the vessel, and the choroid lamina epithelialis

Question 7

Choroid Plexus

Answer 7

The convuluted vessels, and their surrounding tela choroidea bulging into the ventricles

Question 8

Choroid Taenia

and name the choroid taenia

Answer 8

The attachment lines of the choroid lamina epithelialis.

Tenia Thalami - Floor of the lateral ventricles and roof of the third ventricle,

Tenia Fornicis - along the fornix on roof of lateral ventricle, medially
Tenia Choroidea - laterally

Tenia fimbriae- continuation of tenia fornicis into the inferior horn (Fibreiae give rise to the Fornix)
Tenia Terminalis - continuation of tenia Choroidea into inferior horn

Question 9

Choroid Glomus

Answer 9

The enlarged portion of the choroid plexus in the lateral ventricle, at the junction between the inferior horn and the body.