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CNS > [ANAT] THALAMUS > Flashcards

[ANAT] THALAMUS Flashcards

1
Q

sensations relayed by thalamus

A

all except smell

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2
Q

which systems’ impulses does the thalamus relay

A

motor & limbic

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3
Q

anterior end of thalamus lies in relation to

A

posterior to interventricular foramen of monro

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4
Q

posterior end of thalamus expands and forms

A

pulvinar

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5
Q

thalamus is a gateway for

A

cerebral cortex

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6
Q

superior surface of thalamus is related to

A

choroid plexus

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7
Q

superior surface of thalamus forms

A

floor of lateral ventricle

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8
Q

inferior surface of thalamus is separated from subthalamus & hypothalamus by

A

hypothalamic sulcus

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9
Q

medial & lateral geniculate bodies are found in

A

posterior part of inferior surface

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10
Q

medial surface of thalamus forms

A

lateral wall of 3rd ventricle

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11
Q

both medial surfaces of thalamus are joined together by

A

interthalamic adhesion (connexus)

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12
Q

lateral surface of thalamus is separated from lentiform nucleus by

A

posterior limb of internal capsule

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13
Q

thalamic nuclei are divided into 3 groups by

A

internal medullary lamina

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14
Q

anterior nuclei receives afferents from

A

mammillary bodies via mammillo-thalamic tract

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15
Q

anterior nuclei sends afferents to

A

cingulate gyrus via anterior thalamic radiation

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16
Q

function of anterior nuclei

A

part of limbic system;
involved in emotions & short term memory

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17
Q

nuclei which forms a part of the papez circuit

A

anterior nucleus

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18
Q

medial nuclei receives afferents from

A

limbic system; hypothalamus, olfactory cortex
amygdala

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19
Q

medial nuclei sends efferents to

A

prefrontal cortex via medial forebrain bundle

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20
Q

function of medial nuclei

A

part of limbic system; involved in thinking & mood

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21
Q

metathalamus consists of

A

medial geniculate body
lateral geniculate body

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22
Q

medial geniculate body recieves afferents from

A

inferior colliculus

23
Q

lateral geniculate body receives afferents from

A

optic tract

24
Q

lateral geniculate body sends efferents to

A

area V1 of cortex

25
Q

medial geniculate body sends efferents to

A

areas A1,A2 of cortex

26
Q

non specific nuclei include

A

midline nucleus
intralaminar nucleus
reticular nucleus

27
Q

site of midline nuclei

A

beneath ependyma ventricle on medial surface of thalamus

28
Q

midline nuclei receive afferents from

A

reticular formation (brainstem)

29
Q

midline nuclei send efferents to

A

entire cortex

30
Q

function of midline nuclei

A

part of RAS;
alertness
increase activity of cerebral cortex

31
Q

reticular nuclei receive afferents from

A

entire cerebral cortex

32
Q

reticular nuclei send efferents to

A

thalamic nuclei

33
Q

function of reticular nuclei

A

inhibits thalamic nuclei during sleep

34
Q

arterial blood supply of thalamus

A

posteromedial group of PCA=medial &anterior parts

posterolateral group of PCA=lateral & posterior parts

35
Q

posterolateral group of PCA is

A

thalamogeniuclate artery

36
Q

venous drainage of thalamus

A

thalamostriate vein

37
Q

thalamic syndrome

A

vascular lesion of thalamogeniculate artery
leads to:
-decreased pain threshold
-overreaction to painful stimuli
-spontaneous pain

38
Q

dorsal tier of thalamus include

A

lateral-dorsal nucleus
lateral-posterior nucleus
palvinar

39
Q

dorsal tier receives afferents from

A

other thalamic nuclei

40
Q

dorsal tier sends efferents to

A

sensory association area

41
Q

ventral tier of thalamus include

A

VAN
ventral-anterior nucleus
VLN (is the ventral-intermediate)
ventral-lateral nucleus
VPN
ventral-posterior nucleus
-VPLN
-VPMN

42
Q

VAN afferents

A

basal ganglia, from globus pallidus

43
Q

VAN efferents

A

supplementary motor area

44
Q

function of VAN

A

relays motor circuits

45
Q

VLN afferents

A

cerebellum, from dentate nucleus
via dentato-thalamic tract

46
Q

VLN efferents

A

area 4, area 6

47
Q

function of VLN

A

relays motor planning of voluntary movements

48
Q

VPLN afferents

A

medial & spinal leminsci

49
Q

VPLN efferents

A

body area of postcentral gyrus (upper 2/3)

50
Q

VPMN afferents

A

trigeminal lemniscus
solitario-thalamic tract

51
Q

VPMN efferents

A

head area of postcentral gyrus (lower 1/3)

52
Q

dorsal part of diencephalon includes

A

thalamus
metathalamus
epithalamus

53
Q

ventral part of diencephalon includes

A

hypothalamus
subthalamus

CNS (29 decks)

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