Cerebellum

Question 1

Structure of the Cerebellum

Answer 1

Gray matter on the outside, white matter on the inside

Question 2

Function of the Cerebellum

Answer 2

1. Does not initiate movement
2. Coordinates movement, especially in relation to distance
3. important in vestibular function

Question 3

Layers of the Cerebellum

Answer 3

molecular, purkinje, granular

Question 4

Pathways of Input

Answer 4

1. Mossy fibers to granular layer

2. climbing fibers to molecular layer

Question 5

Pathways of Output

Answer 5

inhibitory, GABA

Question 6

Regions of the Cerebellum

Answer 6

1. spinocerebellum in middle
2. Cerebrocerebellum on outside
3. Vestibulocerebellum underneath

Question 7

Spinocerebellum

Answer 7

proper execution of coordinated movement

Question 8

Cerebrocerebellum

Answer 8

planning coordinated, properly timed movement sequences

Question 9

Vestibulocerebellum

Answer 9

Coordinated balance and eye movement

Question 10

Cerebellar Dysfunction

Answer 10

1. Generalized ataxia
2. Dysmetria, especially hypermetria
3. intention tremor
4. Vestibular Dysfunction

Question 11

Generalized Ataxia

Answer 11

affects head, trunk, and limbs

Question 12

Dysmetria

Answer 12

abnormal movements related to distance

Question 13

Hypermetria

Answer 13

movements bigger than they have to be

Question 14

Intention Tremor

Answer 14

tremor when they intend to carry out purposeful movement. Only seen with cerebellar lesion

Question 15

Tremor

Answer 15

rhythmic oscillation of body part caused by alternating contractions of antagonistic muscles

Question 16

Cerebellar Hypoplasia

Answer 16

cerebellum doesn’t form normally in fetus. Born with cerebellum that is too small. Can be caused by panleukopenia in cats, parvo in dogs, viruses in cattle, or genetic disease in Arabian horses