Week 3- Pain and Headaches Flashcards
(46 cards)
PAIN- “an unpleasant sensory and emotional experience associated with actual or potential tissue damage
“an unpleasant sensory and emotional experience associated with actual or potential tissue damage
is pain adjective or subjective
subjective
-pain scale
where is pain perceived in the brain
-somatosensory cortex
-limbic system (emotional part of pain)
-brain stem for autonomic functions
pain as a separate sensory modality evoked by the activity of specific receptors that transmit information to pain centers in the forebrain
Specificity pain theory
-deals with the acute, specific injury
various different sensory receptors capture different stimuli and convey them to the sensory cortex
-special receptors for each type of pain
labelled line pain theory
pain receptors share endings or pathways with other sensory modalities
-different patterns of activity of the same neurons can be used to signal painful and non-painful stimuli
pattern pain theory
-the presence of neural gating mechanisms at the segmental spinal cord level accounts for interactions between pain and other sensory modalities
-block pain at the level of the spinal cord using another modality
gate control theory pain
_________ stimulus never ascends to somatosensory cortex
noxious
-not all pain goes to the brain
neuromatrix theory of pain
-patient can adapt to pain
-brain’s role in pain as well as the multiple dimensions
and determinants of pain
nociceptive pain
nociceptors [pain receptors] are activated in response to
actual or impending tissue injury
neuropathic pain
arises from direct injury or dysfunction of the nerves
pain from non-injurious stimuli to the skin
allodynia
extreme sensitivity to pain
hyperalgesia
the absence of pain from stimuli that normally would be painful
analgesia
any noxious stimulus that injures or is perceived to injure
tissue
nociception
-activates classic withdrawal reflex
what stimulates nocioceptros
- mechanical stimuli
- thermal stimuli
- chemical stimuli
- neurogenic inflammation
what nerve fibers are assocaited with fast pain
A fibers
what nerve fibers are assocaited with slow pain
C fibers
what part of the brain produces analgesia
periaqueductal gray* [endogenous analgesic center in the midbrain]
types of pain
- acute
- chronic
- cutaneous
- visceral
- referred
allodynia
pain due to a stimulus that does not normally provoke
pain
ie. walking on leg that fell asleep
hyperalgesia
increased pain from a stimulus that normally provokes
pain
hyperesthesia
increased sensitivity to stimulation, excluding the special
senses
parasetheisa
an abnormal sensation, whether spontaneous or evoked
that is not unpleasant
-pins and needles