Thalamus and Internal Capsule

Question 1

Thalamus is composed 80% of _____.

Answer 1

Diencephalon (gray matter)

Question 2

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

Answer 2

lateral; thalamus

Question 3

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

Answer 3

Interthalamic; Anterior, Lateral, Medial

Question 4

What are the 2 tracts that uses intralaminar nuclei?

Answer 4

Paleospinothalamic tract and Spinoreticular tract(?)

Question 5

Reticular nuclei lies between _____ and _____ lamina.

Answer 5

Internal capsule and external medullary lamina

Question 6

Which nuclei inhibits thalamocortical transmission?

Answer 6

Reticular nuclei

Question 7

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

Answer 7

Intralaminar nuclei

Question 8

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

Answer 8

True

Question 9

Which nuclei uses ARAS (Ascending reticular activating system)?

Answer 9

Intralaminar nuclei

Question 10

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

Answer 10

Medial group

Question 11

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

Answer 11

Mediodorsal

Question 12

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

Answer 12

Medioventral

Question 13

Which one of the Medial group is part of Memory?

Answer 13

Anterior

Question 14

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

Answer 14

Ventral group of thalamus

Question 15

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

Answer 15

Thalamic syndrome

Question 16

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

Answer 16

Lateral dorsal

Question 17

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

Answer 17

Lateral posterior

Question 18

What are the 3 functional groups of nuclei?

Answer 18

• Specific (relay)
• Association
• Non-specific

Question 19

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

Answer 19

Anterior, VA,VL,VP and Geniculates

Question 20

What are the parts of Association nuclei group?

Answer 20

Lateral dorsal, mediodorsal, lateral posterior, and pulvinar

Question 21

What are the parts of Non-specific nuclei group?

Answer 21

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

Question 22

_____ of the internal capsule is Bounded by the

lentiform nucleus and head of the caudate nucleus.

Answer 22

Anterior limb

Question 23

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

Answer 23

Genu

Question 24

_____ of the internal capsule is Bounded by the

lentiform nucleus and the thalamus

Answer 24

Posterior limb

Question 25

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

Answer 25

Retrolentiform

Question 26

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

Answer 26

Sublentiform

Question 27

Thalamic radiations is also known as?

Answer 27

Thalamocortical fibers

Question 28

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

Answer 28

internal capsule

Question 29

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

Answer 29

Anterior

Question 30

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

Answer 30

Superior

Question 31

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

Answer 31

Posterior

Question 32

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

Answer 32

Inferior

Question 33

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

Answer 33

Internal capsule due to striate arteries.

Question 34

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

Answer 34

Anterior limb

Question 35

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

Answer 35

Posterior limb

Question 36

Corticobulbar is found in what structure of internal capsule?

Answer 36

Genu

Question 37

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

Answer 37

Sublentiform

Question 38

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

Answer 38

Retrolentiform

Question 39

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

Answer 39

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