Lecture 8: Cerebellum & Basal Nuclei with Motor Function Flashcards Preview

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Flashcards in Lecture 8: Cerebellum & Basal Nuclei with Motor Function Deck (33):
0

Which cortex plans movements based on sensory and visual cues?

Premotor cortex (area 6)

1

Which motor area retrieves and coordinates memorized motor sequences?

Supplementary motor area (area 6)

2

What does the cerebellum play a major role in?

The timing of motor activities

3

T/F: The cerebellum is essential for locomotion.

False, not essential

4

The cerebellum functions with the _____ to enhance the stretch relfex.

Spinal cord

5

The cerebellum functions with the _____ to make postural movements.

Brain stem

6

The cerebellum functions with the _____ to provide accessory motor functions.

Cerebral cortex

7

What do the basal nuclei do?

Plan and control complex patterns of muscle movement

8

T/F: The cerebellum sends the output motor function signal to the muscles.

False, cerebellum sends signal to motor cortex which sends signal to muscles

9

_____ nuclei fibers project to reticular formation & vestibular nuclei and lesions cause trunk ataxia.

Fastigial

10

_____ nuclei project to the red nucleus and lesions cause extremity ataxia.

Dentate

11

_____ cells' axons form parallel fibers in cortex.

Granular

12

_____ cells project from parallel fibers to granular cell bodies.

Golgi

13

_____ cells project from parallel fibers to purkinje axon hillock.

Basket

14

_____ cells project from parallel fibers to purkinje dendrites.

Stellate

15

TQ: Which cells are the only out put cells of the cerebellar cortex?

Purkinje cells

16

TQ: T/F: Each functional unit of the cerebellar cortex is centered on a Purkinje cell and a corresponding shallow nuclear cell.

False, deep nuclear cell

17

T/F: The vestibulocerebellum consists of the flocculonodular lobes and vermis

True

18

T/F: The spinocerebellum consists mostly of vermis and intermediate zone.

True

19

T/F: The cerebrocerebellum consists of medial parts of hemispheres.

False, lateral parts of hemispheres

20

Which portion of the cerebellum is involved in coordination of skilled movement and speech?

Cerebrocerebellum

21

Which tracts form the mossy fibers that terminate on the granule cells in the cerebellar cortex?

Corticopontocerebellar, vestibulocerebellar, reticulocerebellar, & spinocerebellar

22

The putamen is the major input source for the _____.

Motor cortex

23

The putamen circuit is for?

Subconscious execution of learned patterns of movement. (bypasses caudate nucleus)

24

Continuous spontaneous writhing movements of a hand, arm, neck or face (athetosis) are a result of lesions of which basal nuclei?

Globus pallidus

25

Sudden, flailing movements of an entire limb (hemiballismus) are results of lesions to which basal nuclei?

Subthalamus

26

Flicking movements in hands, face, or elsewhere (chorea) are results of lesions in which basal nuclei?

Putamen

27

Rigidity, akinesia, and tremors (Parkinson's disease) are results of lesions to which basal nuclei?

Substantia nigra

28

The caudate circuit is for?

Cognitive planning of sequential and parallel motor patterns

29

Which neurotransmitters are inhibitory?

Dopamine, GABA, & Serotonin

30

Which neurotransmitters are excitatory?

Acetylcholine, Norepinephrine, Encephalin, & Glutamate

31

Widespread destruction of pars compacta of substantia nigra that sends dopaminergic fibers to caudate nucleus and putamen is termed what?

Parkinson's

32

Loss of most cell bodies of GABA-secreting neurons of caudate nucleus and putamen and of Ach neurons in other parts of the brain is termed what?

Huntington's