block d lecture 3 Flashcards
sensory reception
3 classes of sensory receptors
cutaneous
prorioceptors
special senses
what part of the sensory receptor in skin is sensitive to pain and temp
free nerve endings
what part of sensory receptor in skin is sensitive to pressure and vibration
pacinian corpsuscle
3 parts of the sensory receptor in skin that is sensitive to various types of touch
merkels disc
ruffinis ending
messners corpsuscle
3 parts of the sensory receptor in skin that is sensitive to various types of touch
merkels disc
ruffinis ending
messners corpsuscle
where is 1st order neuron located
reeceptor
where is 2nd order neuron located
between thalamus and spinal cord
where is 3rd order neuron located
between thalamus and cortex
where is 3rd order neuron located
between thalamus and cortex
2 sensory pathways to brain
dorsal column
spinothalamic
what is decussation
pathways cross to other side
thus sensory info processed on other side of brain
what does dorsal column system recognise
fine touch
pressure
proprioception
what does spinothalamic system recognise
pain
temp
coarse touch
where does all coulmn info go
PCG via 3rd order neuron
2 types of nociceptor fibre
A* fibre
C fibre
what do A* recognise and properties
fast sharp pain
myelinated
what do C fibres recognise and properties
slow dull aching pain
unmyelated
where are thermo and mechanoreceptors located
A* fibres
where are polymodal nociceptors located
C fibres
where is referred pain
pain percieved to come from different part of body than where generated
what is spinal cord modulation of pain carried by
C fibres
why can you not treat pain carried by A* fibres
no opiate receptors
examples of non steroidal anti inflammatory drugs
aspirin
ibuprofen
how do non steroidal anti inflammatory drugs block inflammation
blocks COX1 and COX2
