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Neuroanatomy (Final) > Thalamus and Internal Capsule > Flashcards

Thalamus and Internal Capsule Flashcards

1
Q

Thalamus is composed 80% of _____.

A

Diencephalon (gray matter)

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2
Q

External medullary
lamina:
-Covers _____ surface
-Separates _____ from shell-like reticular nucleus
-Thalamocortical and corticothalamic fibers

A

lateral; thalamus

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3
Q

Internal medullary
lamina:
-_____ fibers -Divides thalamus into 3 masses:

A

Interthalamic; Anterior, Lateral, Medial

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4
Q

What are the 2 tracts that uses intralaminar nuclei?

A

Paleospinothalamic tract and Spinoreticular tract(?)

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5
Q

Reticular nuclei lies between _____ and _____ lamina.

A

Internal capsule and external medullary lamina

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6
Q

Which nuclei inhibits thalamocortical transmission?

A

Reticular nuclei

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7
Q

Which nuclei is responsible for arousal from sleep and cortical activation?

A

Intralaminar nuclei

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8
Q

(T/F) Arousal and pain can both activate intralaminar nucle.

A

True

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9
Q

Which nuclei uses ARAS (Ascending reticular activating system)?

A

Intralaminar nuclei

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10
Q

Mediodorsal, Medioventral, and Anterior are all part of which group?

A

Medial group

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11
Q

Which one of the Medial group is part of behavior responses (prediction and incentives)?

A

Mediodorsal

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12
Q

Which one of the Medial group is part of behavior (visceral and emotional responses)?

A

Medioventral

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13
Q

Which one of the Medial group is part of Memory?

A

Anterior

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14
Q 
What group are these part of?
– Geniculates 
– Ventral L
– Ventral A
– Ventral P
A

Ventral group of thalamus

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15
Q

Ventral group of thalamus:
Bouts of severe pain
that occurs spontaneously or in response to tactile stimuli. These are symptoms of?

A

Thalamic syndrome

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16
Q

Lateral Group- which part is in charge of:
• Memory
• Interpretation of
visual stimuli

A

Lateral dorsal

17
Q

Lateral Group- which part is in charge of: •Interpretation of visual & other sensory stimuli
•Formulation of complex behavioral responses

A

Lateral posterior

18
Q

What are the 3 functional groups of nuclei?

A
  • Specific (relay)
  • Association
  • Non-specific
19
Q

What are the parts of Specific (relay) nuclei group?

A

Anterior, VA,VL,VP and Geniculates

20
Q

What are the parts of Association nuclei group?

A

Lateral dorsal, mediodorsal, lateral posterior, and pulvinar

21
Q

What are the parts of Non-specific nuclei group?

A

Intralaminar (rostral continuation of reticular formation), and reticular nucleus

22
Q

_____ of the internal capsule is Bounded by the

lentiform nucleus and head of the caudate nucleus.

A

Anterior limb

23
Q

_____ of the internal capsule is Medial to the apex of the lentiform nucleus.

A

Genu

24
Q

_____ of the internal capsule is Bounded by the

lentiform nucleus and the thalamus

A

Posterior limb

25
Q

_____ of the internal capsule is the Region behind the lentiform nucleus

A

Retrolentiform

26
Q

_____ of the internal capsule is the Fibers beneath posterior part of lentiform nucleus

A

Sublentiform

27
Q

Thalamic radiations is also known as?

A

Thalamocortical fibers

28
Q

Thalamic radiations( Thalamocortical): Fibers to the cerebral cortex coursing in the _____ and corona radiata

A

internal capsule

29
Q

_____ thalamic radiation is from mediodorsal thalamic nucleus to prefrontal cortex.

A

Anterior

30
Q

_____ thalamic radiation is from ventral posterior thalamic nucleus to parietal lobe; VA/VL thalamic nucleus to frontal lobe.

A

Superior

31
Q

_____ thalamic radiation is from lateral geniculate nucleus to occipital lobe; pulvinar to occipital lobe.

A

Posterior

32
Q

_____ thalamic radiation is from medial geniculate nucleus to temporal lobe.

A

Inferior

33
Q

_____ is the most common site of spontaneous hypertensive hemorrhage in individuals with chronic hypertension.

A

Internal capsule due to striate arteries.

34
Q

Anterior thalamic radiation; corticopontine. These are found in what structure of internal capsule?

A

Anterior limb

35
Q

Superior thalamic radiation (3rd order DCML), and corticospinal tract are found in what structure of internal capsule?

A

Posterior limb

36
Q

Corticobulbar is found in what structure of internal capsule?

A

Genu

37
Q

Inferior thalamic radiation (Auditory) is found in what structure of internal capsule?

A

Sublentiform

38
Q

Posterior thalamic radiation (Optic radiation) is found in what structure of internal capsule?

A

Retrolentiform

39
Q

A stroke in posterior limb of internal capsule will results in?

A

Contralateral lost of motor neck down, and lost of 2pt touch, vibration, and pressure contralateral neck down.

Neuroanatomy (Final) (11 decks)

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