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PNB 2XB3 Lecture 4: Somatosensory System Questions and Answers | Latest Update 2024/2025 $9.99   Add to cart

Exam (elaborations)

PNB 2XB3 Lecture 4: Somatosensory System Questions and Answers | Latest Update 2024/2025

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  • Course
  • PNB 2XB3
  • Institution
  • PNB 2XB3

dermatome - ~~> the area of skin supplied by the sensory axons of a single spinal nerve dorsal horn - ~~> the POSTERIOR column of grey matter in the spinal cord (shape differs depending on spinal segment) - contains SENSORY neuron cell bodies ventral horn - ~~> the ANTERIOR c...

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  • September 20, 2024
  • 13
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • PNB 2XB3
  • PNB 2XB3
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1 | P a g e | © copyright 2024/2025 | Grade A+


PNB 2XB3 Lecture 4: Somatosensory
System Questions and Answers |
Latest Update 2024/2025
dermatome -

✓ ~~> the area of skin supplied by the sensory axons of a single spinal

nerve



dorsal horn -

✓ ~~> the POSTERIOR column of grey matter in the spinal cord (shape

differs depending on spinal segment) - contains SENSORY neuron cell

bodies



ventral horn -

✓ ~~> the ANTERIOR column of grey matter in the spinal cord (shape

differs depending on spinal segment) - contains MOTOR neuron cell

bodies



3 types of primary somatosensory afferent axons -

✓ ~~> 1) Aβ

2) Aδ

3) C



Aβ axon - sensory function -




Master01 | September, 2024/2025 | Latest update

, 2 | P a g e | © copyright 2024/2025 | Grade A+

✓ ~~> touch (mechanoreceptive)



Aβ axon - receptor type -

✓ ~~> Merkel, Meissner, Pacinian, Ruffini cells



Aβ axon - axon diameter -

✓ ~~> 6-12 microns



Aβ axon - conduction velocity -

✓ ~~> 35-75 m/s



Aδ axon - sensory function -

✓ ~~> pain and temperature (thermoceptive and nociceptive)



Aδ axon - receptor type -

✓ ~~> free nerve endings (myelinated)



Aδ axon - axon diameter -

✓ ~~> 1-5 microns



Aδ axon - conduction velocity -

✓ ~~> 5-30 m/s




Master01 | September, 2024/2025 | Latest update

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