Midterm - Basal Ganglia/Miscellanious Flashcards Preview

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Flashcards in Midterm - Basal Ganglia/Miscellanious Deck (13):
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Parts of the basal ganglia

Caudate nucleus
Putamen
Globus pallidus
Clastrum
Amygdaloid nucles

1

Basal ganglia

Inhibitory effect on motor control
Plays role in cognition and muscle tone

4 circuits with bidirectional capacity

2

Basal ganglia and cerebellum

Modifying and refining movements
Inhibitory and fascilatory effect
Lesion in either would result in a movement disorder

3

Damage to basal ganglia

Parkinson's disease - cells of substantia nigra secrete dopamine to the caudate nucleus
Huntington disease - inappropriate behavioral and movement patterns

4

Developmental disabilities

Mental retardation
Fragile x syndrome
Down syndrome - trisomy 21, 3 copies

5

What part of the the brain does deep brain stimulation effect

Globus pallidus and subthalamic nucleus
Improves motor function and lessens medication
Evokes depression and psychiatric problems

6

Diencephalon

Thalamus
Epithalamus
Sub thalamus
Hypothalamus
Sensorimotor intergrator and gateway for information to the brain

7

LMN lesion

Loss of muscle power and control
Reduced reflexes
Atrophy of muscles and flaccid paralysis

8

Motor control is enhanced by

Inhibitory effect of basal ganglia and excitatory effect of cerebellum

9

UMN lesion

Loss of voluntary movements in affected muscles, hyperactive reflexes because of increased muscle tone

10

2 typs of specialized receptors in muscles

Muscle spindles
Golgi tendon organs

11

Muscle spindles

Detect degree and rate of change in muscle lengths
Help maintain muscle tone

12

Golgi tendon organs

Monitor muscle tension during contraction