19. Anatomy of the Fourth Ventricle: Lateral View

Question 1

Identify 1 - 2

Answer 1

1. Habenular commissure

2. Cerebral aqueduct

Question 2

The fourth ventricle is a rhomboid-shaped structure in cross section, receiving cerebrospinal fluid from (1)____ above and providing exit of CSF into (2)____ through (3)_____ and (4)___

Answer 2

1. the cerebral aqueduct
2. the subarachnoid space
3. the paired lateral foramina of Luschka
4. the midline foramen of Magendie

Question 3

Structurally, the roof and dorsolateral walls

of the fourth ventricle are adjacent to __ and ____

Answer 3

the deep cerebellar nuclei and zones of the cerebellum itself.

Question 4

Identify 3 - 5

Answer 4

3. Superior medullary velum
4. Inferior medullary velum
5. Choroid plexus of fourth ventricle

Question 5

Identify 6 - 7

Answer 5

6. Central canal of spinal cord

7. Median aperture (foramen of Magendie)

Question 6

Identify 8

Answer 6

8. Fourth ventricle

Question 7

Identify 9

Answer 7

9. Posterior commissure

Question 8

Identify 10 - 11

Answer 8

10. Interventricular foramen of Monro

11. Choroid plexus of third ventricle

Question 9

Just beneath the floor of the fourth ventricle are ____ (3), and areas associated with the nuclei and associated connections of the cranial nerve nuclei.

Answer 9

the tubercles, eminences, colliculi

Question 10

On the floor of the fourth ventricle Is ___ and ___

Answer 10

the sulcus limitans and the basal plate

(On the floor of the fourth ventricle is the sulcus limitans, the developmental demarcation of the alar plate laterally (sensory nuclei and structures) and the basal plate medially (motor and autonomic nuclei and structures).