Term
| 3 componenets to anesthesia are |
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Definition
| analgesia, amnesia, immobilization |
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Term
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Definition
| an unpleasant sensory and emotional experience associated with actual or potential tissue damage |
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Definition
| bone, muscle, visceral-- caused by activation or sensitization of peripheral nociceptors (peripheral nerve endings) |
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Definition
| burning, tinglg, pins and needles sensations-- caused by injury or acquired abnormalities of peripheral or central neural structures. |
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Definition
| phychological mechanisms or environmental factors in combination with other mechanisms often produce chronic pain |
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Term
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Definition
| describes the recognition and transmission of painful stimuli |
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Term
| nocioceptors are free _____ nerve endings of myelinated A-delta and nmyelinated C fibers |
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Definition
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Term
| nociceptors are free nerve endings that sense ____, ____, ____ tissue damade |
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Definition
| heat, mechanical, chemical |
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Term
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Definition
| respond to pinch and pinprick |
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Term
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Definition
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Term
| polymodal mechanoheat nociceptors |
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Definition
| most prevalent, respond to excessive pressure and extreme (< 42C and < 18C) and alogens |
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Term
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Definition
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Term
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Definition
Protopathic sensation:
noxious (pain)
subserved by high-threshold receptors
conducted by smaller, lightly myelinated (Aδ) and unmyelinated (C) nerve fibers |
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Term
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Definition
Epicritic sensation:
nonnoxious
light touch, pressure, proprioception, and temperature discrimination
Characterized by low-threshold receptors
Generally conducted by large myelinated nerve fibers |
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Term
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Definition
A Beta fibers: 5-12 microns
Large, myelinated fibers.
Transmit impulses quickly.
Transmits sensations of touch, pressure and proprioception.
Carry sensations described as epicritic (non-noxious) |
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Term
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Definition
A Delta fibers: 2-5 microns
Myelinated with lipid-like substance.
Transmit impulses fast.
Sense “sharp” and well-localized sensations.
First pain or “Acute” pain
Carry sensations described as protopathic (noxious).
Warns you to react quickly. |
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Term
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Definition
C Fibers: 0.4-1.2 microns
Unmyelinated
Transmit impulses slowly.
Sense dull, poorly localized sensations.
Second Pain or “Chronic” pain
Transmits protopathic sensations of pain, temperature, and touch. |
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