Pain Modulation - 1 Flashcards
type of pain where nociceptors are activated
somatic nociceptive
an upleasant sensory or emotional experience associated with tissue damage
pain
activation of nociceptors found in viscera and can be referred
nociceptive visceral
not all blank are sensitive to pain
viscera
pain that has no mechanical origin
psychogenic
pain that is caused by cancer and is severe
carcinogenic
four types of pain
acute, chronic, referred, radicular
radicular pain is secondary to a blank nerve root
irritated
pain is referred from the diaphragm to the blank
tip of shoulder
four mechanoreceptors
meissners, pacinian, merkle, ruffini
two thermoreceptors
hot, colt
three proprioceptors
golgi tendon organ, pacinian, ruffini
nociceptor example
free nerve ending
the life of a sensor
few days
nociceptors have a high activation blank
threshold
fibers from hair follicles that have a very low threshold
a beta
fibers that are local to the injury
a delta
dull aching pain fibers that are long lasting and difficult to tolerate and is a slow onset
c fibers
trauma that activates a delta and c fibers like dropping brick on foot
mechanical trauma
two neurons that transmit pain
nociceptive specific, wide….
sensation of pain depends on stim of specific nerve endings that are specialized for that sensation
specificity theory
sensation of pain that depends on what rate and sequence of receptors firing
pattern theory
opiod receptors are found at peripheral nerve blank
terminals
theory where nerve impulses, evoked by injury, are influenced in the spinal cord by other stimuli…. why we rub our arm when we hurt it
gate control