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2 Neuroanatomy > Lecture 4 > Flashcards

Lecture 4 Flashcards

1
Q

Somatosensory Functions

A

posture
coordination
object manipulation
object ID
avoidance of tissue damage
emotional wellness
communication

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2
Q

Dermatomes

A

sensory region of skin innervated by nerve root

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3
Q

Thalamic nuclei

A

some have a MAP
other have diffuse projections SPREAD OUT

cortex to thalamus outnumber thalamus to cortex

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4
Q

Categories of thalamic nuclei

A

relay
intralaminar
reticular

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5
Q

Relay nuclei

A

make up majority
receive inputs and project to cortex
receive connections back from cortex

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6
Q

Intralaminar nuclei

A

lie in internal medullary lamina
receive inputs and have connections back to cortex
nonspecific
main inputs/outs are from basal ganglia

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7
Q

Reticular nuclei

A

does NOT project to cortex
receive from other thalamic nuclei, projects back to thalamus
regulate thalamic nuclei
modulate alterness and attention

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8
Q

VPL

A

ventral posterior lateral
somatosensory from spinal cord

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9
Q

VPM

A

ventral posterior medial
somatosensory relays from cranial nerves

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10
Q

LGN

A

lateral geniculate nucleus
relays visual info

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11
Q

MGN

A

medial geniculate nucleus
relays auditory info

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12
Q

VL

A

ventral lateral nucleus
relays for motor pathways leaving cerebellum and basal ganglia on route to M1, PM, SMA

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13
Q

Anterior nuclear group

A

relays info from limbic pathways to anterior cingulate cortex

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14
Q

Pulvinar

A

nonspecific
relays visual and other sensory inputs to behavior centers

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15
Q

Mediodorsal

A

nonspecific
major thalamic relay info to frontal association cortex

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16
Q

DCML

A

converys proprioception, vibrations, fine touch goes to the VPL

17
Q

APS

A

conveys pain, temperature, crude touch
goes to VPL

18
Q

A-Alpha

A

proprioception
muscle spindle and golgi tendon organ

19
Q

A-Beta

A

proproception = muscle spindle
merkel = vibration
Meissner = light touch, vibration
Pacinian = vibration
Ruffini = deep touch
Hair receptor = light touch

20
Q

A=delta

A

pain
temp
itch

21
Q

C fibers

A

pain
temp
itch

22
Q

First order neurons of DCML

A

a beta fibers inter dorsal root
ascend to medulla
synapse in nucleus gracilis and nucleus cuneatus

23
Q

Gracilis fasciculus

A

carries info from legs and lower trunk

24
Q

Cuneate fasciculus

A

carries info from upper trunk

25
Q

Second Order Neuron DCML

A

nuc. gracilis and nuc. cuneatus
decussate in arcuate fibers and form medial leminscus
synapse in VPL of thalamus

26
Q

Third order neuron DCML

A

project through internal capsule to reach primary somatosensory cortex

27
Q

muscle spindle

A

proprioception

28
Q

merkel

A

vibration

29
Q

Meissner

A

light touch, vibration

30
Q

Pacinian

A

= vibration

31
Q

Ruffini

A

deep touch

32
Q

Hair receptor

A

light touch

2 Neuroanatomy (14 decks)

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