Touch Flashcards

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1
Q

What is the function somatosensory system

A

Provide info about touch and pain from the body

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2
Q

What are the 3 exteroceptions?

A
  1. Mechanoreception
  2. Thermoreception
  3. Nocireception
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3
Q

Where are somatic senses detected by?

A

The receptors from the endings of nerve fibres

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4
Q

Somatic nerve fibres are classified by:

A
  1. The axon diameters
  2. Their absense/presence of myelin
  3. The type of info they transmit
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5
Q

Sensory neuon: Aa

A

13-20 micrometers in diameter
80-120 m/s conduction
Proprioception in skeletal muscle

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6
Q

Sensory neuron Ab

A

6-12 micrometers in diameter
35-75 m/s conduction
Skin mechanoreceptors

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7
Q

Sensory neuron: Ad

A

1-5 micrometers in diameter
5-30 m/s conduction
Fast pain and cold temps

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8
Q

Sensory neuron: C

A

0.2-1.5 micrometers in diameter
0.5-2 m/s conduction
Dull pain, hot pain, itch

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9
Q

4 Cutaneous mechanoreceptors in the skin:

A
  1. Meissner’s corpuscles
  2. Merkel’s disks
  3. Pacinian corpuscles
  4. Hair follicle receptors (hair on skin)
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10
Q

Adaptive rate function

A

Determines if stimulus is changing and how fast it is doing so

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11
Q

Receptive field sites function

A

Identify where the stimulus is happening on your skin

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12
Q

What is Form Perception?

A

Identifying the form or shape of the object by touch

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13
Q

What is Texture perception?

A

Discriminate the smoothness and roughness of an object

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14
Q

What is Vibration perception?

A

Distinguishing fluttering and vibration of object on your skin.

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