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ANAT1012 > Somatosensory pathways > Flashcards

Somatosensory pathways Flashcards

1
Q

Anterolateral pathway - modalities

A

Crude touch
Nociception
Temperature
… from contralateral body

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2
Q

Dorsal column pathway - modalities

A 
Discrete touch
Pressure
Vibration
Conscious proprioception 
... from ipsilateral upper limb (cuneatus) and lower limb (gracilis)
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3
Q

Anterolateral pathway - location of 1st order neuron cell body

A

Dorsal root ganglion

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4
Q

Dorsal column pathway - location of 1st order neuron cell body

A

Dorsal root ganglion

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5
Q

Anterolateral pathway - location of 2nd order neuron cell body

A

Dorsal horn of spinal cord

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6
Q

Dorsal column pathway - location of 2nd order neuron cell body

A

Nucleus gracilis and nucleus cuneatus

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7
Q

Anterolateral pathway - location of 3rd order neuron cell body

A

VPL of thalamus

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8
Q

Dorsal column pathway - location of 3rd order neuron cell body

A

VPL of thalamus

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9
Q

Anterolateral pathway - location of decussation

A

Spinal cord via and anterior white commissure

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10
Q

Dorsal column pathway - location of decussation

A

Caudal medulla

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11
Q

Anterolateral pathway - somatotopic organisation

A

New fibres join at the anteromedial edge - sacral most lateral, cervical most medial

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12
Q

Dorsal column pathway - somatotopic organisation

A

New fibres joint at the lateral edge - cervical most lateral, sacral most medial

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13
Q

Anterolateral pathway - location of final synapse

A

Primary somatosensory cortex - postcentral gyrus

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14
Q

Dorsal column pathway - location of final synapse

A

Primary somatosensory cortex - postcentral gyrus

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15
Q

Anterolateral pathway - contributing fasciculi

A

1 - anterolateral fasciculus

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16
Q

Dorsal column pathway - contributing fasciculi

A

2 - fasciculus gracilis (medial) and fasciculus cuneatus (lateral)

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17
Q

Spinal trigeminothalamic - modality

A

Nociception

Temperature

18
Q

Chief sensory trigeminothalamic - modality

A

Discriminative touch

19
Q

Spinal trigeminothalamic - location of 1st order neuron cell body

A

Trigeminal ganglion

20
Q

Chief sensory trigeminothalamic - location of 1st order neuron cell body

A

Trigeminal ganglion

21
Q

Spinal trigeminothalamic - location of 2nd order neuron cell body

A

Spinal nucleus - medulla

22
Q

Chief sensory trigeminothalamic - location of 2nd order neuron cell body

A

Chief sensory nucleus - pons

23
Q

Spinal trigeminothalamic - location of 3rd order neuron cell body

A

VPM of thalamus

24
Q

Chief sensory trigeminothalamic - location of 3rd order neuron cell body

A

VPM of thalamus

25
Q

Spinal trigeminothalamic - location of decussation

A

Medulla

26
Q

Chief sensory trigeminothalamic - location of decussation

A

Pons

27
Q

Posterior spinocerebellar - function

A

Subconcsious proprioception of trunk and ipsilateral LL

28
Q

Cuneocerebellar - function

A

Subconscious proprioception of ipsilateral UL

29
Q

Anterior spinocerebellar - function

A

Compares incoming proprioception from LL with descending input to lower motor neurons

30
Q

Posterior spinocerebellar - location of 1st order neuron cell body

A

Dorsal root ganglion

31
Q

Cuneocerebellar - location of 1st order neuron cell body

A

Dorsal root ganglion

32
Q

Anterior spinocerebellar - location of 1st order neuron cell body

A

Dorsal root ganglion

33
Q

Posterior spinocerebellar - location of 2nd order neuron cell body

A

Clarke’s nucleus (C8-L3)

34
Q

Cuneocerebellar - location of 2nd order neuron cell body

A

Accessory cuneate nucleus (medulla)

35
Q

Anterior spinocerebellar - location of 2nd order neuron cell body

A

Spinal border cells (ventral horn of spinal cord)

36
Q

Posterior spinocerebellar - enters cerebellum via

A

Inferior cerebellar peduncle

37
Q

Cuneocerebellar - enters cerebellum via

A

Inferior cerebellar peduncle

38
Q

Anterior spinocerebellar - enters cerebellum via

A

Superior cerebellar peduncle

39
Q

Posterior spinocerebellar - 2nd order neuron ascends in …

A

Lateral funiculus

40
Q

Cuneocerebellar - 1st order neurons ascends in…

A

Fasciculus cuneatus

41
Q

Anterior spinocerebellar - decussaates

A

In spinal cord after synapse with 2nd order neuron in spinal border cells
Again in the cerebellum

ANAT1012 (9 decks)

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