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Physiology > Pain > Flashcards

Pain Flashcards

1
Q

Pain

A

-Unpleasant, physical or emotional experience
- somatic sensation

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2
Q

Fast pain

A

Felt within 1 seconds of the stimulus
Sharp

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3
Q

Slow pain

A

Begins after one second or more an increases slowly
Throbbing or aching

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4
Q

Pain receptors

A

Free nerve endings
Widely distributed

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5
Q

Pain receptor activation

A

Mechanical
Thermal
Chemical

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6
Q

Non-adaptive nature

A

Adapt very little

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7
Q

Hyperlalgesia

A

Increased excitation of pain fibers

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8
Q

Intensity of pain

A

Closely related with the rate of tissue damage

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9
Q

Type 1A Delta fibers

A

Gross touch
Fast pain
High heat
Capsaicin insensitive
Precisely localized

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10
Q

Type 2 A Delta fibers

A

Gross touch
Fast pain
Low heat
Capsaicin sensitive
Precisely localized

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11
Q

C fibers

A

Slow pain
Low pH
Heat
Capsaicin sensitive
Not well localized

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12
Q

Transmission of pain signals through spinal cord and brain

A
  1. Neospinalthalamic tract
  2. Paleospinalthalamic tract
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13
Q

Cordotomy

A

Partially cut spinal cord in the thoracic region that interrupts the anterolateral pathway

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14
Q

Anal Jesus system of the brain and spinal cord

A
  • inhibition of incoming pain signals at the cord level
  • enkephalin secreting neurons suppress pain signals in the cord and brain stem
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15
Q

The brains opiate system

A
  • opiate receptors in many areas of the brain
  • endogenous opioids act like exogenous opioids
  • endogenous opioids help control pain
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16
Q

Endorphins

A
  • released by the pituitary gland
  • block pain perception
  • block the release of substance P from opiate receptors
17
Q

Referred pain

A

Pain in one of the visceral organs referred to an area on the body surface
- result of a network of interconnecting sensory nerves

18
Q

Visceral pain

A

Pain from the internal thoracic pelvic or abdominal organs
- vague
- poorly localized

19
Q

Causes of visceral pain

A

Ischemia
Chemical damage
Spasm of smooth muscle
Excess distension
Stretching of connective tissue

20
Q

Hyper algesia

A
  1. Excessive sensitivity of the pain. Receptors
  2. Facilitation of sensory transmission

Physiology (7 decks)

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