Mod. 5 Video 1 - Cerebellum

Question 1

Similar to the cerebrum, the cerebellum consists of two hemispheres, and a white matter core with deep nuclei embedded in the core.

A. True
B. False

Answer 1

A. True

Explanation:
This statement is true: similar to the cerebrum the cerebellum has a right and left hemisphere and a white matter core that consists of afferent and efferent fibers with deep cerebellar nuclei embedded in the white matter core.

Question 2

What is the name of the mid-line structure of the cerebellum?

A. vermis
B. flocculus
C. nodulus

Answer 2

A. vermis

Explanation:
The vermis is the mid-line structure of the cerebellum. The nodulus and flocculus form the flocculonodular lobe.

Question 3

Which cerebellar penducle contains the major efferent projections of the cerebellum and connects the cerebellum to the midbrain?

A. inferior
B. middle
C. superior

Answer 3

C. superior

Explanation:
The superior cerebellar peduncle will carry the major efferent fiber bundles of the cerebellum and it connects the cerebellum to the midbrain. The middle cerebellar peduncle will carry the major afferent fiber bundles and connect the cerebellum to the pons. The inferior cerebellar peduncle will contain both afferent and efferent fiber bundles and connect the cerebellum to the medulla.

Question 4

Which of the following cortical zones consists of the majority of the cerebellar hemispheres?
A. medial zones
B. lateral zones
C. intermediate zones

Answer 4

B. lateral zones

Explanation:
The lateral zone is the largest of the cortical zones and it encompasses the majority of the cerebellar hemispheres and also include the flocculus. The medial (vermal zone) is located just adjacent to the mid-line and includes the nodulus. The intermediate zone occupies an area between the lateral and medial zones and excludes the flocculonodular lobe.

Question 5

Which cortical zone is associated with the interposed nuclei?

A. medial
B. lateral
C. intermediate

Answer 5

C. intermediate

Explanation:
Each cortical zone has a deep cerebellar nucleus associated with it. The intermediate zone is associated with the interposed nuclei (emboliform & globose). The medial zone is associated with the fastigial nucleus and the lateral zone with the largest of the nuclei, the dentate nucleus.

Question 6

The cerebellum plays an important role in the maintenance of balance, coordination of eye, speech, and skilled limb movements, and motor learning.

A. True
B. False

Answer 6

A. True

Explanation:
This statement is true: the key functions of the cerebellum are the maintenance of balance and posture; coordination of movements; and motor learning.