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ANTOMY & PHYSIOLOGY OF PAIN

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yonatan reuven

on 22 June 2016

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Transcript of ANTOMY & PHYSIOLOGY OF PAIN

ANATOMY & PHYSIOLOGY OF PAIN
Treansmissin
Perception
INTRODUCTION
Modulation
Spinal mechanism
Supra-spinal mechanism
nociception & pain
definition & descriptor terminology
A commonly used definition describes pain as an unpleasant sensory and emotional experience associated with actual or potential tissue damage or described in terms of such damage.
A revised definition identifies pain as "a somatic perception containing:
(1) a bodily sensation with qualities like those reported during tissue-damaging stimulation,
(2) an experienced threat associated with this sensation, and
(3) a feeling of unpleasantness or other negative emotion based on this experienced threat" .
pacinian corpuscle
merkel's corpuscle
meissner corpuscle
ruffini corpuscle
free nerve ending
•Specific
•Polymodal
C - fiber
A- delta fiber
YONATAN REUVEN
PAIN-RELATED DEFINITIONS
Pain definition
Pain descriptor terminology
PHYSIOLOGY OF PAIN
Transduction
Transmission
Modulation
Perception
Hyperalgesia — Increased response to a stimulus that normally is painful.
Hypoalgesia — Diminished response to a normally painful stimulus.
Analgesia — Absence of pain in response to stimulation that normally is painful.
Hyperesthesia — Increased sensitivity to stimulation, excluding the special senses.
Hypesthesia — Diminished sensitivity to stimulation, excluding the special senses.
Dysesthesia — An unpleasant abnormal sensation, whether spontaneous or evoked.
Paresthesia — An abnormal sensation, whether spontaneous or evoked.
Allodynia — Pain resulting from a stimulus (such as light touch) that does not normally elicit pain.
physiology
pathology
psychogenic
idiopathic
iatrogenic
acute
chronic
Transduction
Nociceptive specific
Wide dynamic range(WDR)
Intra-neurons inhibitors
Gate-control theory
descending pain control mechanism
Full transcript