L21 - somatosensory disorders Flashcards
fast conducting pathway
dorsal columns
slow conducting pathway
spinothalamic
myelinated fibres
dorsal columns
unmyelinated fibres
spinothalamic
Myelitis
inflammation of the spinal cord
consequence of lesion to medulla
DCML pathway is spared as here is where crossing over occurs
spinothalamic fibres are in the middle of the medulla and so you lose this (pain and temperature sensation) (this is contralateral to the side of the lesion)
anterior spinal artery syndrome - what is it?
occlusion of the anterior spinal artery and infarction of the spinal cord
anterior spinal artery syndrome symptoms
loss of blood supply to this region affects spinothalamic tract and motor functions from this area
where is the lesion: loss of sensation of the left side of body including face to all modalities - accompanied by pain in the left sided limbs
stoke to RHS of thalamus (this is where both pathways are travelling together contralaterally) = right thalamic infarct
lacunar stroke
stroke affecting small perforating vessels
dysgraphaesthesia
if you write a number on the hand, you cannot recognise it
hemisensory neglect
do not perceive that side of the body as their own
result of stroke in the parietal cortex
- dysgraphaesthesia
- hemisensory neglect
- R/L confusion
- no numbness
syringomyelia
expansion of the spinal canal
what fibres does syringomelia affect first
spinothalamic
