Ventricles

Question 1

What are the horns of the lateral ventricle called?

Answer 1

• anterior horn (frontal horn) - posterior horn (occipital) - inferior horn (temporal horn)

Question 2

Through which openings does the lateral ventricles communicate with the other ventricles and which ventricle do they open into?

Answer 2

Communication happens through the interventricular forarmen of Monro, which connects the lateral ventricles and the third ventricle.

Question 3

What are the borders of the anterior horn?

Answer 3

Lateral wall: caudate nucleus Medial wall: septum pellucidum Floor, anterior wall and roof: radiation of corpus callosum (radiation of the rostrum, genu and body)

Question 4

What are the borders of the central part of the lateral ventricle?

Answer 4

Roof: corpus callosum Floor: dorsal aspect of the thalamus, covered by the lamina affixa Lateral wall: body of caudate nucleus Medial wall: choroid lamina epithelialis of the lateral ventricle, attached to the fornix (tenia fornicis) and to the thalamus (tenia choroidea).

Question 5

What are the borders of the posterior horn?

Answer 5

Lateral wall: tapetum of corpus callosum The other walls are formed by occipital white matter. In the medial wall two longitudinal elevations are seen: the bulb of the posterior horn, formed by the radiation of the corpus callosum (forceps major) and the calcar avis produced by the calcarine fissure. On the floor, the collateral trigone, caused by the collateral sulcus, is found

Question 6

Which lobe of the cerebrum does the inferior horn reside in?

Answer 6

Temporal lobe

Question 7

What are the borders of the inferior horn?

Answer 7

Floor: hippocampus and the collateral eminence (caused by collateral sulcus) Roof and lateral wall: white substance of the hemisphere and along its medial border are the stria terminalis and tail of the caudate nucleus. Anteriorly: the amygdaloid nucleus bulges into the anterior end of the horn. Medial wall: the choroid lamina epithelialis (with choroid tela and choroid plexus) is attached to the fimbriae of the hippocampus (teniae fimbriae) and to the stria terminalis (tenia terminalis)

Question 8

What structure run through the third ventricle?

Answer 8

Interthalamic adhesion

Question 9

What are the borders of the third ventricle?

Answer 9

Lateral wall: thalamus, hypothalamic sulcus and hypothalamus Roof: choroid lamina epithelialis of the third ventricle (choroid tela and choroid plexus). The attachments of choroid lamina epithelialis: tenia thalami (on stria medullaris thalami), habenulae and habenular commissure. Floor: is formed by the hypothalamus with the optic chiasm infundibulum, mammillary bodies and subthalamus Anterior wall: contains anterior commissure, columns of the fornix, and lamina terminalis. Posterior wall: habenular commissure, the posterior commissure, pineal recess, habenular commissure and suprapineal recess.

Question 10

Through which openings does the third ventricle communicate with the other ventricles?

Answer 10

• 2 interventricular forarmina laterally, that communicate with the lateral ventricles. - the cerebral aqueduct (of Sylvius) posteriorly, that communicate with the fourth ventricle.