Ventricles

Question 1

Borders of the ant.horn of lat.ventricle

Answer 1

Lat.: head of caudate nucleus
Med.: septum pellucidum
Floor,Ant., Roof: radiation of corpus callosum (rostrum&Genu&body)

Situated anterior to the interventricular foramen of Monro

Question 2

Central part of Lat. ventricle

Answer 2

Posteriorly from interventricular foramen, at the level of splenium of corpus callosum

Roof: corpus callosum
Floor: dorsal thalamus, covered by Lamina affixa.
Lat.: body of caudate nucleus
Med.: choroid Lamina epithelialis of Lat. ventricle

Question 3

Posterior horn of Lateral ventricle

Answer 3

Lat. wall: tapetum of corpus callosum
Other: occipital white matter

• medial wall: 2 longitudinal elevations—> bulb of post.horn by forceps major & calcar avis
• on the floor the collateral trigone is found

Question 4

Inferior horn of Lateral ventricle

Answer 4

Floor: hippocampus and collateral eminence
Roof&lat.wall : tapetum, Stria terminalis and tail of caudate nucleus
Anterior: amygdaloid nucleus bulges into the anterior end of the horn.
Med.wall: choroid lamina epithelialis

Question 5

3rd ventricle

Answer 5

Located in the midline ventricle cleft of diencephalon
Lat. wall: thalamus,hypothalamic sulcus and hypothalamus

Roof: choroid lamina epithelialis + tenia thalami + Habenular commissure

Floor: hypothalamus, optic chiasm, infundibulum, mamillary bodies, subthalamus

Ant.wall: ant.commissure, columns of fornix, lamina terminalis

Post.: habenular commissure, post.commissure

Openings:
2 interventricular foramina- laterally
Cerebral aqueduct- posteriorly

Question 6

4th ventricle

Answer 6

Roof (tent shape):
sup.medullary velum, inf.medullary velum, nodule of cerebellum, choroid lamina epithelialis of 4th vent.

Floor (rhombus shape—> rhomboid fossa):
Stria medullares, facial colliculus, locus ceruleus, vestibular area, hypoglossal trigone, vagal trigone, area postrema