Ch. 14 Flashcards
(88 cards)
Pain
Dysfunctions of general or spectifc senses
Pain characteristics
-Unpleasent but productive phenomnenon
-Can’t be defined, identified or measured by others
Complex characteristics of pain
interactions between, physical, cognative, and emotions
McCarffery Definition of pain
Whatever experiencethe person says it is, exhisting when they say it does
Temperature variations
-Signal disease
Manefestations of temperature functions
-Fever
-symptom of infectious or inflammatory conditions
Theories of pain
-Specificity theory
-Gate control theory
-Neuromatrix theory
Specific theory
-Injury activates specific pain receptors
-Intensity of pain is directly related to associated tissue injury
Example of specificity theory
-Pricking a finger: Minimal pain
-Cutting hand: Higher pain
Problem with specificity theory
Doesn’t account for persistant, emotional pain
Gate control theory
-Combines theories to explain multidimensionl aspects
-transmission altered by a balance of signals sent to s.cord: cells work as a “Gate”
Spinal gate
controls pai transmission to centers in the CNS
Neuromatrix theory
-Brain produces patterns of nerve impulses drawn from various inputs, including genetic, psychological, and cognitive experiences
Can pain be felt with out ecperiencing it?
Yes
-Phantom limb
-Neuromatrix theory
Neuromatrix theory stimuli
trigger patters but don’t make them
Pain pathway
3 parts of NS responsable for perception, sensation, and response
-Afferent pathways
-Interpretive pathways
-Efferent pathways
Nocioception
Processing of harmful (noxious) stimuli through NS
Nociocepters
Pain receptions
-Free nerve endings in afferent PNS
2 types of Nociocepters
- A delta fibers
-C fibers
A Delta fibers
-Large myelinated
-access large tracts in S.cord
C fibers
-Smaller unmylenatied
-Access smaller tracts in S.cord
Fast sharp pain is percieved by
A Delta fibers
Dull throbbing pain
C FIbers
Transduction
Activation of nociocepters