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M1 > Somatosensory Receptor Physiology > Flashcards

Somatosensory Receptor Physiology Flashcards

1
Q

detection of the elements and energies in our internal and external environment

A

Sensation

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2
Q

Sensation requires and is triggered by

A

o Requires: conversion of environmental signals → signals that can be recognized by our CNS
o Triggered by: arrival of action potentials in the primary sensory cortex

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3
Q

the interpretation of the significance, meaning or quality of the sensation

A

Perception

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4
Q

Perception depends on and involves:

A

o Depends on: genetics, learning, memory, context, and physiological state
o Involves: integration of information from many brain regions

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5
Q

Sensory signals are processed at the ________ and ________ level

A

conscious and subconscious

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6
Q

Classification of Sensory Systems:

A
  • The Somatosensory System
  • The Visceral Sensory System
  • The Special Sensory System
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7
Q
  • The Somatosensory System
    • Conveys impulses from:
A
  • Skin
  • Skeletal muscles
  • Joints
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8
Q
  • The Somatosensory System
    • Sensations produced include:
A
  • Pressure
  • Vibration
  • Tickle
  • Tension
  • Stretch
  • Itch
  • Temperature
  • Pain
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9
Q
  • The Visceral Sensory System
    • Conveys impulses from
A
  • Internal organs
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10
Q
  • The Visceral Sensory System
    • Sensations produced include:
A
  • Stretch
  • Pressure
  • Pain
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11
Q
  • The Visceral Sensory System
    • Processes subconscious detection of:
A
  • Osmolarity
  • pH
  • O2
  • CO2
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12
Q
  • Special Sensory Systems
    • Conveys impulses from
A
  • Special sense organs (eyes, ears, nose…)
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13
Q
  • Special Sensory Systems
    • Sensations produces include:
A
  • Light
  • Sound
  • Flavor
  • Scent
  • Balance
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14
Q

detected by sensory receptors that are scattered throughout the body

A

general senses

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15
Q

detected by receptors localized to special sensory organs (located in the head)

A

special senses

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16
Q
  • Sensory Receptors are Transducers that
A
  • Specialized to detect environmental energy
  • Convert stimulus energy into changes in transmembrane electrical potential of the sensory receptor cell.
  • Trigger action potentials
17
Q
  • Receptor Classification by Origin of Stimulus
A
  • Exteroceptors
  • Interoceptors (visceroceptors)
  • Proprioceptors
18
Q
  • Exteroceptors:
    • Respond to:
    • Receptors located in:
    • Produce sensations of:
A
  • Respond to stimuli arising from outside of the body
  • Receptors located in skin and special sensory organs
  • Produce sensations of:
    • Light
    • Sound
    • Smell
    • Taste
    • Touch
    • Temperature
19
Q
  • Interoceptors
    • Respond to:
    • Sensitive to:
A
  • Respond to stimuli arising in internal viscera and blood vessels
  • Sensitive to:
    • Chemicals
    • pH
    • tissue stretch
    • temperature
20
Q
  • Proprioceptors
    • Respond to stimuli arising from:
    • Sensitive to:
    • Produces sensations of:
A
  • Respond to stimuli arising from:
    • skeletal muscles
    • tendons
    • joints
    • ligaments
    • connective tissues
  • Sensitive to:
    • Contraction
    • Stretch
    • Movement
  • Produces
    • sensations of body movements and spatial position
21
Q

Receptor Classification by Type of Stimulus Detected

A
  • Mechanoreceptors
  • Thermoreceptors
  • Photoreceptors
  • Chemoreceptors
  • Nociceptors
22
Q
  • Mechanoreceptors
    • Respond to _______ forces
A

mechanical

  • Touch
  • Pressure
  • Vibration
  • Stretch
  • Tension
23
Q
  • Respond to temperature changes
A

Thermoreceptors

24
Q

Respond to wavelength of light

A

Photoreceptors

25
Q

Chemoreceptors respond to:

A
  • Chemicals
  • Osmolality
  • pH
  • CO2
  • O2
  • Organic molecules
  • Airborne
  • Odorant molecules
26
Q
  • Respond to damage or potentially damaging stimuli of several modalities
A
  • Nociceptors (polymodal)
27
Q
  • Primary Sensory Neurons
    • Cell Body Location
      • General senses:
      • Special senses:
A
  • General senses: dorsal root ganglia or cranial nerve ganglia
  • Special senses: special sensory organs
28
Q
  • Primary Sensory Neurons
    • Neuronal Structure
      • General senses:
      • Special senses:
A
  • Usually pseudo unipolar for general senses
  • Usually bipolar for special senses
29
Q

Sensory Receptor Structures: Simple

  • Nerve endings:
  • Location
A
  • Nerve endings:
    • Naked
    • Encapsulated naked
  • Location
    • In skin
    • Muscle joints

M1 (48 decks)

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