Ray-1 Flashcards

(6 cards)

1
Q

Somatosensory receptors

A
  • Classified by energy transduced
    • Mechanoreceptors
    • Thermoreceptors
    • Nociceptors (pain receptors)
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2
Q

Mechanoreceptors

A
  • Pacinian Corpuscle
  • Meissner’s Corpuscle
  • Ruffini Ending
  • Merkel Cell
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3
Q

Pacinian Corpuscle

A

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
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4
Q

Meissner’s Corpuscle

A

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
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5
Q

Ruffini Ending

A

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
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6
Q

Merkel Cell

A

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
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