Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

NeuroPhys > Cerebellar Function > Flashcards

Cerebellar Function Flashcards

1
Q

Define: Titubation

A

Tremor of the entire trunk or head during stance or gate.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the inputs to the vestibulocerebellum?

A

Primary afferents from vestibular labyrinth/nuclei.

Indirect visual inpur from sup. colliculi and striate cortex.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the output from the vestibulocerebellum?

A

Mainly to vestibular nuclei and fastigial nucleus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the function of the vestibulocerebellum?

A

Controls eye movements and position of the head.

regulates gait and posture.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is seen in lesions involving the vestibulocerebellum?

A 
Ataxic gait (wide stance)
Eye movement disorders.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the inputs to the spinocerebellum vermis portion?

A

Somatosensory from spinal cord axial proximal body parts.

Vestibular inputs

Facial, visual, auditory input to posterior lobe only.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are the outputs of the spinocerebellum vermis portion?

A 
Via fastigial nucleus to:
Medial motor systems
Vestibular nucleus
Reticular formation
Motor cortex
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the function of the spinocerebellum vermis portion?

A

Regulates axial and proximal musculature.

Concerned with ongoing motor execution and regulation of muscle tone.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is seen in lesions of the spinocerebellum vermis portion?

A

Decreased muscle tone
Decreased proximal and axial musculature.
Problems with ongoing motor execution.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the inputs to the spinocerebellum paravermal region?

A

Somatosensory from distal body parts.

Input from primary and somatic sensory cortex.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the outputs of the spinocerebellum paravermal region?

A

Via intopositus to:
Lateral motor systems
Red nucleus and motor cortex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the function of the spinocerebellum paravermal region?

A

Regulates distal muscle.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is seen in lesions affecting the spinocerebellum paravermal region

A

SEEN IPSILATERALLY TO LESION CAUSING HYPOTONIA.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the inputs to the cerebrocerebellum AKA pontocerebellum?

A

Cortical afferents via the pontine nuclei.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the outputs of the cerebrocerebellum?

A

Via dentate nucleus:

  • To lateral nucleus of thalamus and red nucleus
  • Ventral lateral thalamus then projects to the premotor and primary motor cortex.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the function of the cerebrocerebellum?

A
  • Preperation for movement.
  • Multi joint movement
  • Patients ability to judge elapsed time in non motor task.
17
Q

What is seen in lesions to the cerebrocerebellum?

A

Delay initiating and terminating movements.
Problems with multijoint movement.
Cant judge elapsed time with non-motor tasks (can improve with eyes closed

18
Q

What function do purkinje cells have?

A

Only cell to project out of cerebellar cortex.

19
Q

What function do Granule cells have?

A

Only excitatory cells in cerebellar cortex.

20
Q

What function do Golgi cells have?

A

Affect dendritic input to perkinje cells by inhibiting granular cells.

21
Q

What function do stellate cells have?

A

Affect dendritic integration of purkinje cells.

22
Q

What function do Basket cells have?

A

Make inhibitory synapses near initial segment of the purkinje cell axon.

23
Q

How do mossy fibers affect perkinje cells?

A

Indirectly sends excitatory signals to the granule and golgi cell dendrites. The granule cells are then able to excite the purkinje cells with small ESPSs.
LEARNING

24
Q

Where do climbing fibers originate?

A

Inerior olivary nuclei

Each Purkinje cell only makes one synapse onto a climbing factor. Climbing factors synapse with multiple purkinje cells.

25
Q

What cerebellar effects are seen in alcoholism?

A

Lack of B1 thiamine leads to damages to the anterior lobe of cerebellum.

Causes difficulty with leg control.

26
Q

What cerebellar effects are seen in Frederich Ataxia

A

A recesively inherited disease causing spinocerebellar ataxia.

Caused by trinucleotide GAA repeat on chromosome 9

NeuroPhys (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions