Lecture 22 (Cerebellum 2.0)

Question 1

Cerebellum control mechanisms

Answer 1

1. Feedback: desired output compared to actual output
2. Feedforward: uses sensory information to program best set of instructions to accomplish desired output

Question 2

Movement disorders cerebellum

Answer 2

Ipsilateral side of damage
- Ataxia
- Dysmetria
- Intentional tremor
- Decomposition of movement
- Hypotonia
- Dysarthria
- Dysfunction of vestibular division

Question 3

Ataxia

Answer 3

Lack of order

Question 4

Dysmetria

Answer 4

Loss of ability to gauge distance, speed or power of movement

Question 5

Intentional tremor

Answer 5

Tremor found with movement

Question 6

Decomposition of movement

Answer 6

Movement is series of simple movement instead of smooth movement

Question 7

Hypotonia

Answer 7

Reduced sensitivity of stretch reflex and muscle tone due to reduced activation of UMNs and therefor reduced activity of gamma LMNs

Question 8

Dysarthria

Answer 8

“scanning” speech or staccato speech
- decomposition of movement in phonation and articulation

Question 9

Dysfunction of vestibular division

Answer 9

• Ataxic gait with widespread standing position
• Nystagmus
• Lack of ability to use vestibular info to coordinate movement of body or eyes
• Not while lying down