Control of Movement 3

Question 1

What is the vestibulocerebellum?

Answer 1

Flocculonodular node

Question 2

What is the spinocerebellum?

Answer 2

Vermis

Intermediate part of hemisphere

Question 3

What is the cerebrocerebellum?

Answer 3

Lateral part of hemisphere

Question 4

What is the role of the flocconodular lobe?

Answer 4

Maintaining balance and posture

Question 5

What is the role of the spinocerebellum?

Answer 5

Modulates axial and anti-gravity muscles as well as eye movements

Question 6

What is the role of the cerebrocerebellum?

Answer 6

Motor planning - sequences and coordinates distal muscles

Question 7

Name the cerebellar deep nuclei from lateral to medial

Answer 7

Dentate Emboliform Globose Fastigial

Question 8

What is the interposed nucleus?

Answer 8

Emboliform and globose nucleus combined

Question 9

Where does the fastigial nucleus send information to?

Answer 9

Medial descending systems involved in trunk and proximal muscles via reticular formation

Vestibular, tectum ad cranial nerve nuclei for control of head and eye movements

Question 10

Where does the interposed nucleus send information?

Answer 10

Lateral descending systems involved in distal muscles via the spindles

Question 11

Where does the dentate nucleus send information and what for?

Answer 11

Motor and premotor cotices for motor planning

Question 12

Where in the cerebellum is information from the vestibular nucleus passed for processing?

Answer 12

Flocculonodular lobe

Question 13

Where are motor corrections sent to from the vestibulocerebellum?

Answer 13

Fastigial nucleus –> Vestibular nuclei & medullary reticulum (inhibitory)

Question 14

Describe flocculonodular lobe syndrome

Answer 14

Not common
Seen in children with medulloblastoma
Characterised by truncal ataxia - wide based stance, swinging

Question 15

Which type of information arrives at the spinocerebellum and via which tracts?

Answer 15

Proprioceptive via spinocerebellar and cuneocerebellar tracts
Motor intention via motor cortex

Question 16

Where are corrective signals sent from the cerebellum?

Answer 16

Cerebra, red nucleus, vestibular nuclei (via thalamus)

Question 17

Describe anterior lobe syndrome (spinocerebellum)

Answer 17

Overshoot (cerebellar drift)
Intention tremor
Lack of movement dampening

Question 18

What type of information leaves the cerebrocerebellum and via which structures?

Answer 18

Info concerning order and timing of movements via dentate nucleus to cerebral cortex

Question 19

Which side are cerebellar lesion signs on and why?

Answer 19

Ipsilateral

Output is contralateral but then crosses back at pyramids

Question 20

Describe medial and lateral cerebellar lesions

Answer 20

Medial - truncal ataxia, nystagmus

Lateral - limb ataxia

Question 21

Which side are signs from a vermis lesion?

Answer 21

Bilateral for trunk and proximal muscles (bilateral innervation)

Question 22

Symptoms of a vermus lesion

Answer 22

Wide stance, unsteady

Slow and slurred speech

Question 23

Symptoms of cerebrocerebellum lesion

Answer 23

Delay in initiation of movement

Loss of complex motor skills i.e. multi-joint movements

Question 24

Symptoms of intermediate lobe

Answer 24

Limb ataxia

Action tremor