Pain I Flashcards
(43 cards)
What is nociception?
the method of feeling pain
What is a neuromodulator?
a substance that alters nerve impulse transmission.
What is pain threshold?
the point beyond which a stimulus causes pain
what is an adjunct or adjuvant?
something that is added as a supplementary rather than an essential part
How long must you experience pain for it to be classified as chronic?
> 3 months
Describe what deep somatic pain or visceral pain is.
It is pain that is initiated in the ligaments, tendons, bones, blood vessels, and muscles.
described as dull, aching, poorly localized pain. Ex broken bone or sprain
What is neuropathic pain?
chronic pain resulting from injury to the nervous system.
Can be to the CNS or PNS
What are endogenous chemicals?
chemicals that originate within the body
What is pain tolerance?
it is the maximum level of pain that a person is able to tolerate
explain the difference between pain threshold and pain tolerance.
Pain threshold is the point where pain can be detected
pain tolerance is the maximum pain that one can endure
What is cutaneous/superficial pain?
pain that is detected just below the skin.
This area has a high amount of nociceptors resulting in a well defined, localized pain of short duration
What is referred pain?
It is pain that is felt in a part of the body other than its actual source.
Define pain.
Pain is whatever the experiencing person says it is, existing wherever the person says it is.
PAIN IS WHAT THE PATIENT SAYS IT IS
Who introduced the gate control theory and in what year?
Melzack and Wall in 1965
Explain the gate control theory. What does it emphasize?
Pain = physiological process + psychological variables
emphasized the holistic nature of pain.
What did the gate control theory develop into?
the neuromatrix theory that includes a genetic component
What are the five dimensions of pain? explain each.
1) PHYSIOLOGICAL and SENSORY: the physical sensation/experience
2) AFFECTIVE: emotional aspect
3) BEHAVIOURAL: wincing, crying, irritable, not wanting to move
4) COGNITIVE: perception and coping strategies
5) SOCIOCULTURAL: influence how pain is expressed
What are the four phases of nociception?
TRANSDUCTION
TRANSMISSION
PERCEPTION
MODULATION
Describe the phase of transduction
1) noxious stimuli cause tissue damage
2) sensitizing chemicals released by damaged cells (ex bradykinins and prostaglandins)
3) chemicals stimulate nociceptors
4) AP generated and travels from periphery to spinal cord
What do NSAIDs target to relieve pain?
NSAIDs target the sensitizing substances released by damaged cells such as bradykinins and prostaglandins
Describe the transmission phase of nociception.
Has three parts
1) injury site to spinal cord
2) spinal cord to dorsal horn for processing
3) to thalamus (basic pain sensation) and cortex (interprets pain)
Describe what perception of pain is
the conscious experience of pain
recognition and definition of pain
Describe what perception of pain is
the conscious experience of pain
when pain is recognized, defined and responded to by the individual
List 3 substances that are involved in the modulation of pain.
1) endogenous opioids such as enkephalins and endorphins
2) serotonin
3) norepinephrine