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Flashcards in Ray-1 Deck (6)
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1

Somatosensory receptors

  • Classified by energy transduced
    • Mechanoreceptors
    • Thermoreceptors
    • Nociceptors (pain receptors)

2

Mechanoreceptors

  • Pacinian Corpuscle
  • Meissner's Corpuscle
  • Ruffini Ending
  • Merkel Cell

3

Pacinian Corpuscle

Mechanoreceptor

  • RA (rapidly adapting)
  • AB
  • Receptive Field size: Large
    • due to vibration sensitive
  • responds to Contact; Vibration
    • acceleration points in skin indentation
  • aka vibration detector

4

Meissner's Corpuscle

Mechanoreceptor

  • RA
  • AB
  • Respond to: skin indentation
    • Contact
      • velocity changes (ramps of skin movement)
      • no responsse with steady indentation
    • flutter (slow vibration)
  • Receptive Field: Small

5

Ruffini Ending

Mechanoreceptor

  • SA type II
  • AB
  • Respond to:
    • Both: velocity ramp (dynamic phase) and plateau (static phase) of skin indentation
      • Pressure (intensity)
      • Skin stretch
  • Receptive field:
    • Large, stretch sensitive receptive field

6

Merkel Cell

Mechanoreceptor

  • SA type I
  • AB
  • Epithelial cell that has a synapse with the neuron
    • cannot produce action potentials
  • Respond to:
    • Pressure
    • Texture
  • Receptive Field: Small
  • AKA pressure receptor