Somatosensory pathways

Question 1

Anterolateral pathway - modalities

Answer 1

Crude touch
Nociception
Temperature
… from contralateral body

Question 2

Dorsal column pathway - modalities

Answer 2

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

Question 3

Anterolateral pathway - location of 1st order neuron cell body

Answer 3

Dorsal root ganglion

Question 4

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

Answer 4

Dorsal root ganglion

Question 5

Anterolateral pathway - location of 2nd order neuron cell body

Answer 5

Dorsal horn of spinal cord

Question 6

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

Answer 6

Nucleus gracilis and nucleus cuneatus

Question 7

Anterolateral pathway - location of 3rd order neuron cell body

Answer 7

VPL of thalamus

Question 8

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

Answer 8

VPL of thalamus

Question 9

Anterolateral pathway - location of decussation

Answer 9

Spinal cord via and anterior white commissure

Question 10

Dorsal column pathway - location of decussation

Answer 10

Caudal medulla

Question 11

Anterolateral pathway - somatotopic organisation

Answer 11

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

Question 12

Dorsal column pathway - somatotopic organisation

Answer 12

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

Question 13

Anterolateral pathway - location of final synapse

Answer 13

Primary somatosensory cortex - postcentral gyrus

Question 14

Dorsal column pathway - location of final synapse

Answer 14

Primary somatosensory cortex - postcentral gyrus

Question 15

Anterolateral pathway - contributing fasciculi

Answer 15

1 - anterolateral fasciculus

Question 16

Dorsal column pathway - contributing fasciculi

Answer 16

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

Question 17

Spinal trigeminothalamic - modality

Answer 17

Nociception

Temperature

Question 18

Chief sensory trigeminothalamic - modality

Answer 18

Discriminative touch

Question 19

Spinal trigeminothalamic - location of 1st order neuron cell body

Answer 19

Trigeminal ganglion

Question 20

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

Answer 20

Trigeminal ganglion

Question 21

Spinal trigeminothalamic - location of 2nd order neuron cell body

Answer 21

Spinal nucleus - medulla

Question 22

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

Answer 22

Chief sensory nucleus - pons

Question 23

Spinal trigeminothalamic - location of 3rd order neuron cell body

Answer 23

VPM of thalamus

Question 24

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

Answer 24

VPM of thalamus

Question 25

Spinal trigeminothalamic - location of decussation

Answer 25

Medulla

Question 26

Chief sensory trigeminothalamic - location of decussation

Answer 26

Pons

Question 27

Posterior spinocerebellar - function

Answer 27

Subconcsious proprioception of trunk and ipsilateral LL

Question 28

Cuneocerebellar - function

Answer 28

Subconscious proprioception of ipsilateral UL

Question 29

Anterior spinocerebellar - function

Answer 29

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

Question 30

Posterior spinocerebellar - location of 1st order neuron cell body

Answer 30

Dorsal root ganglion

Question 31

Cuneocerebellar - location of 1st order neuron cell body

Answer 31

Dorsal root ganglion

Question 32

Anterior spinocerebellar - location of 1st order neuron cell body

Answer 32

Dorsal root ganglion

Question 33

Posterior spinocerebellar - location of 2nd order neuron cell body

Answer 33

Clarke's nucleus (C8-L3)

Question 34

Cuneocerebellar - location of 2nd order neuron cell body

Answer 34

Accessory cuneate nucleus (medulla)

Question 35

Anterior spinocerebellar - location of 2nd order neuron cell body

Answer 35

Spinal border cells (ventral horn of spinal cord)

Question 36

Posterior spinocerebellar - enters cerebellum via

Answer 36

Inferior cerebellar peduncle

Question 37

Cuneocerebellar - enters cerebellum via

Answer 37

Inferior cerebellar peduncle

Question 38

Anterior spinocerebellar - enters cerebellum via

Answer 38

Superior cerebellar peduncle

Question 39

Posterior spinocerebellar - 2nd order neuron ascends in ...

Answer 39

Lateral funiculus

Question 40

Cuneocerebellar - 1st order neurons ascends in...

Answer 40

Fasciculus cuneatus

Question 41

Anterior spinocerebellar - decussaates

Answer 41

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