Neuro - Module 4 Flashcards Preview

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Flashcards in Neuro - Module 4 Deck (21)
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1
Q

4 basic functions of cerebellum

A
  1. Maintain balance and posture
  2. Coordinated voluntary movements
  3. Motor learning
  4. Cognitive functions
2
Q

Three sensory input used to maintain equilibrium

A
  1. Proprioceptive system
  2. Visual system
  3. Vestibular system
3
Q

Usually are lesions of the cerebellum ipsilateral, contralateral, or bilateral?

A

Ipsilateral and bilateral

4
Q

Cerebellar lesions result in: (general)

A
  1. DO impair motor activity (equilibrium, balance, coordination, tone)
  2. DO NOT result in motor paralysis
  3. DO NOT impair ability to consciously detect sensory input (vision, auditory, ect.)
5
Q

Specific cerebellar lesion results (functional impairments)

A

Hypotonia, disequilibrium, dyssynergia

6
Q

What separates the cerebellum from the telencephalon (cerebral cortex)?

A

Tentorium

7
Q

What are the R and L hemispheres of cerebellar cortex divided by?

A

Vermis w/ flocculonodular lobe along inferior surface

8
Q

What are the 3 cerebellar peduncles that connect cerebellum to brainstem

A

Superior
Middle
Inferior

9
Q

3 areas of the subcortical (deep) region of cerebellum

A

Dentate nucleus
Interposed (globose nucleus and emboliform nucleus)
Fastigial nucleus

10
Q

Describe the “schematic” of the cerebellum

A

Cerebellar inputs –> cerebellar cortex –> deep nuclei –> cerebellar outputs

11
Q

Longitudinal subdivision of the cerebellum

A
  1. Vermis
  2. Paravermis (intermediate)
  3. Lateral hemispheres
12
Q

Phylogenic subdivision of the cerebellum

A
  1. Vestibulocerebellum (archicerebellum)
  2. Spinocerebellum (paleocerebellum)
  3. Pontocerebellum or cerebrocerebellum (neocerebellum)
13
Q

Function of the vermis

A

Coordination/postural control of axial/proximal limb movement and postural adjustments to eye movement

14
Q

Function of paravermis

A

“feedback” mechanism of planned/active movement

“fine tuning” : integrates sensory input w/ current motor activity to produce an adaptive motor response

15
Q

Function of lateral zone

A

learned skilled movement

    • coordination of skilled movement, planning movement, learning motor skills
  • -cognitive learning
  • -emotional learning
16
Q

Superior peduncle connects _____ to ____

A

Cerebellum to midbrain

17
Q

Middle peduncle connects _____ to _____

A

Cerebellum to pons

18
Q

Inferior peduncle connects ____ to ____

A

cerebellum to medulla

19
Q

Does the superior peduncle contain afferent input?

A

NO!!

20
Q

Does the middle peduncle contain afferent input?

A

Yes, it does NOT contain EFFERENT input

21
Q

Two regions of inferior cerebellar peduncle

A
  1. Restiform body

2. Juxtarestiform body