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PNB 2XB3 - Midterm 2: Somatosensory Questions and Answers | Latest Update 2024/2025 £8.52   Add to cart

Exam (elaborations)

PNB 2XB3 - Midterm 2: Somatosensory Questions and Answers | Latest Update 2024/2025

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  • Module
  • PNB 2XB3
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  • PNB 2XB3

Merkell cells - ~~> - slowly adapting - 25% of mechanosensory afferents in hand - highest spatial resolution - edges, points, corners, curvature - static indentation ** Meissener - ~~> - rapidly adapting -40% of mechanosensory innervation in hand - skin motion, indentation, l...

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


PNB 2XB3 - Midterm 2: Somatosensory
Questions and Answers | Latest
Update 2024/2025
Merkell cells -

✓ ~~> - slowly adapting

✓ - 25% of mechanosensory afferents in hand

✓ - highest spatial resolution

✓ - edges, points, corners, curvature

✓ - static indentation **



Meissener -

✓ ~~> - rapidly adapting

✓ -40% of mechanosensory innervation in hand

✓ - skin motion, indentation, low frequency vibrations for textured

objects***

✓ - more than 4x more sensitive than Merkell to skin deformation, but

larger receptive fields so less spatial resolution

✓ - ie. tea set plate etching



Pacinian -




Master01 | September, 2024/2025 | Latest update

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

✓ ~~> - rapidly adapting

✓ - high frequency vibration **

✓ - ie. tool use, vibrations up your arm



Ruffini -

✓ ~~> - slowly adapting

- skin stretch



Dermatome -

✓ ~~> innervation rising from a single dorsal root ganglion on the spinal

nerve



is the overlap of dermatones more extensive for touch or pain/temp -

✓ ~~> more overlap in touch



gracile tract -

✓ ~~> for DCML, bundle of fibers from lower limbs that travel most medial



cuneate tract -

✓ ~~> for DCML, bundle of fibers from upper limbs/neck/trunk that lie

more lateral



post-synaptic dorsal column projection -



Master01 | September, 2024/2025 | Latest update

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