L19: Cerebellum - B

Question 1

Cerebellar cortex, white matter core, and deep cerebellar nuclei make up the __ architecture of the cerebellum

Answer 1

internal

Question 2

Label this:

Answer 2

Question 3

Answer 3

Question 4

Which cells are the only to project OUT of the cerebellar cortex + project primarily to deep cerebellar nuclei?

Answer 4

Purkinje cell

Question 5

Which cells function are interneurons that excite Purkinje neurons via: parallel fibers in the molecular layer?

Answer 5

Granule cell

Question 6

Afferents of the cerebellum enter the cortex via: 1) or 2)

Answer 6

Climbing Fibers or Mossy Fibers

Question 7

Which afferents of the cerebellum terminates on Purkinje cell dendrites in the molecular layer?
A. Mossy Fibers
B. Climbing Fibers

Answer 7

B. Climbing Fibers

Question 8

Which afferents of the cerebellar circuitry terminate on granule cells in granule cell layer?
A. Mossy Fibers
B. Climbing Fibers

Answer 8

A. Mossy Fibers

Question 9

Label the following:

Answer 9

Question 10

True or False: Efferents of cerebellar circuitry are associated with axons of Purkinje cells, which go to deep nuclei

Answer 10

True

Question 11

Which afferent has these features?
A. Mossy Fibers
B. Climbing Fibers

Answer 11

B. Climbing Fibers

Question 12

Which afferent has these features?
A. Mossy Fibers
B. Climbing Fibers

Answer 12

A. Mossy Fibers

Question 13

The outflow of the cerebellum consists of which two steps?

Answer 13

Question 14

Which two fibers make up the efferents of the cerebellum?

Answer 14

1) Corticonuclear fibers
- Purkinje cells (corticofugal! not cerebellofugal!!!!)

2) Cerebellofugal fibers
- deep cerebellar nuclei project to

A. contralateral RN/VL thalamic nucleus
B. ipsilateral vestibular nuclei/brainstem reticular formation

Question 15

Answer 15

Question 16

Answer 16

Question 17

Answer 17

ok :P

Question 18

What symptoms are associated with cerebellar lesion?

Answer 18

gait disturbance

Question 19

Function of spinocerebellum?

Answer 19

Coordination of motor movements + midcourse corrections (adjustments of ongoing movements based on unconscious proprioception information)

Question 20

Which system is responsible for coordination of motor movement based on proprioception information + accuracy of trunk, posture, head, and eye movements (involuntary stuff…)?
A. Paravermal Spinocerebellum
B. Vermal Spinocerebellum

Answer 20

B. Vermal Spinocerebellum

Question 21

What are the three outputs of the Vermal Spinocerebellum?

Answer 21

1. VST
2. RST
3. CST

Question 22

Which system is responsible for accuracy of VOLUNTARY movements (e.g reach or grasping) and midcourse corrections?

A. Paravermal Spinocerebellum
B. Vermal Spinocerebellum

Answer 22

A. Paravermal Spinocerebellum

Question 23

True or False: Outputs of Vermal Spinocerebellum are VST, RST, and CST tracts while outputs of Paravermal Spinocerebellum are CST/RST

Answer 23

True

Question 24

True or False: Ataxia (lack of muscle control or coordination of voluntary movements) suggests Cerebellar Lesion

Answer 24

True

Question 25

True or False: The cerebrocerebellum allows for cerebellar participation in programming and planning voluntary movements (distal extremities)

Answer 25

True

Question 26

True or False: The cerebrocerebellum has inputs from both the periphery and cortex

Answer 26

False - cortex only

Question 27

Answer 27

Question 28

True or False: The Cortico-ponto cerebellar region is important for informing a motor plan, while the Cortico-Olivo-Cerebellar fibers are important for motor learning

Answer 28

True

Question 29

Functions of the lateral cerebellar hemispheres?

Answer 29

Motor learning!!
1) Mental imaging/planning tasks
2) Mental reherarsal of complex movements

Question 30

Summary??

Answer 30