Cerebellum

Question 1

What is a reactive motor control movement and how fast does it occur? Is it voluntary or involuntary?

Answer 1

Movement in response to an unexpected perturbation.

• 50 to 80 ms
• involuntary

Question 2

What is anticipatory motor control and what is the delay in muscle activation?

Answer 2

Back ext firing to stabilize trunk in anticipation of movement
-50ms delay

Question 3

____ loop is movement that is executed without the use of sensory feedback.

Answer 3

Open. Occurs to quickly for adjustment to take place

-eg. boxing jab

Question 4

What are cerebellar folia?

Answer 4

Little folds to accomodate Cb cortical neurons.

Question 5

What separates the flocculonodular lobe from the posterior lobe?

Answer 5

postero-lateral fissure.

Question 6

Does damage to the cerebellum result in paralysis or sensory loss?

Answer 6

No.

Question 7

List the functional subdivisions of the cerebellum and what belongs in each.

Answer 7

VESTIBULOCEREBELLUM

• reciprocal conn w/ vestibular sys
• flocculonodular lobe

SPINOCEREBELLUM
-Vermis (trunk) and paravermal (limbs)

CEREBROCEREBELLUM
-lateral cerebellar hemis of both ant and post lobes