Lp 31 Flashcards
Basic sensation
Thalamus
Discrimination & meaning
Cortex
Emotional aspect
Lambic system
3 known families of endogenous opioids?
-enkephalins
-endorphins
-dynorphins
-objective measure of intensity of stimulation that elicits perception of pain
Pain threshold
Smallest stimulus that elicits a response
Threshold
-subjective measure of individuals ability to withstand pain
-cannot be measured
Pain tolerance
Classifications of pain a re according to?
-source/location
-referral
-duration
-source: superficial structures
-skin
-subQ tissue
-description & characteristics:
-snap, burning
-easily localized
-onset may be abrupt or insidious (slow)
-causes: burns, cuts, abrasion, contusions
Cutaneous pain
-source: dep body structures
-periosteum
-muscles
-joint capsule
-tendons
-blood vessels
-deception & characteristics:
-diffuse
-may radiate
-achy, sharp, dull or throbbing
-causes; pressure, ischemia, tissue damage
Deep somatic pain
-common pain produced by disease
-diffuse & poorly localized nature of visceral pain d/t low density of nociceptors in the viscera compared to the number in the skin
Visceral pain
-perceived at site different from source but innervate by same spinal segment
-often describes visceral pain perceived as arising from somatic structures
Referred pain
-neurological pain that folllows amputation
-up to 70% of amputees experience pain from it
-experienced as sensations of tingling, heat/cold, heaviness, burning, cramping, shooting pain
-may disappear spontaneously or may persist for years
-people may expereince painful sensations that were present prior to the amputation
Phantom limb pain
-lasts less than 6 months (arbitrary time frame)
-result of a tissue-damaging & usually self-limited
-warning system
-can lead to anxiety & secondary reflex musculoskeletal spasm
Acute pain
-currently defined as pn that persists beyond expected normal time of healing
-quite variable
-may be unrelenting & severe
-can be continuous with or without periods of escalation
-may recur, with episodes of acute pain
-persistent chronic Pain serves no useful function (unlike acute pain)
Chronic pain