Control of Pain
Perception
Objectives
review of pain pathways
gate theory
analgesia
opoids system of the body
other methods of pain management
Role in Pain
reticular formation
increases level of
alertness
it is considered the main
switch of the cerebral
cortex
pain pathways terminate in
this area and this why
persons find it hard to
sleep if they are feeling
pain
hypothalamus and limbic
system
behavioural and emotional
responses
thalamus
Control of Pain Perception 1
, perception of pain
Pain control theories
gate control theory
central biasing theory
endogenous opiates theory
Gate control theory
proposed that tha balance of nociceptive and non-nociceptive
afferents within the spinal cord determines the transmission
of pain information to higher centeres
a gate was postulated at each segmental level of the spinal
cord dorsal horn
this gate could be int eh substantia gelatinosa and it allow
only one type of impulse
transmission cell (T cell) is involved
if A beta neurons are stimulatde - subtantia gelatinosa closes
transmission of information at the gate
input from large diameter afferents arriving at gate can
reduce the pain
eg. rubbing the skin near the site of injury to feel better
transcutaneous electrical nerve stimulation (TENS)
acupuncture (dorsal column stim)
Control of Pain Perception 2
Perception
Objectives
review of pain pathways
gate theory
analgesia
opoids system of the body
other methods of pain management
Role in Pain
reticular formation
increases level of
alertness
it is considered the main
switch of the cerebral
cortex
pain pathways terminate in
this area and this why
persons find it hard to
sleep if they are feeling
pain
hypothalamus and limbic
system
behavioural and emotional
responses
thalamus
Control of Pain Perception 1
, perception of pain
Pain control theories
gate control theory
central biasing theory
endogenous opiates theory
Gate control theory
proposed that tha balance of nociceptive and non-nociceptive
afferents within the spinal cord determines the transmission
of pain information to higher centeres
a gate was postulated at each segmental level of the spinal
cord dorsal horn
this gate could be int eh substantia gelatinosa and it allow
only one type of impulse
transmission cell (T cell) is involved
if A beta neurons are stimulatde - subtantia gelatinosa closes
transmission of information at the gate
input from large diameter afferents arriving at gate can
reduce the pain
eg. rubbing the skin near the site of injury to feel better
transcutaneous electrical nerve stimulation (TENS)
acupuncture (dorsal column stim)
Control of Pain Perception 2
