🌓🤪 Pac-Man ate my visual fields!
50 year old person presents with sudden onset headache and seeing "pieces of things" on the R.
Visual fields look like this👇👇
➡️What's happening?
#MedTwitter #MedStudentTwitter #neurotwitter #MedEd #Neurology #EndNeurophobia #stroke
🗺️🧠 Where across the visual system is likely the lesion?
#Ophthalmology
⭕️ Which artery has to be implicated, if this presentation is due to an ischemic #stroke and the rest of the neuro exam is normal?
➡️Answers:
- L lateral geniculate body (LGB): a highly organized, layered retinotopic structure
- L. Lat. post. choroidal a. infarct (PCA branch)
PAC-man visual field defects=wedge shaped
aka "homonymous sectoranopsias"
#neurotwitter
via: @FredLepore
⭕️ Blood supply / 👁️ Visual pathway segments
via: @FredLepore
🗞️FB Walsh J. Neurosurg 9:517-37 (1952)
#MedTwitter #neurotwitter #EndNeurophobia #FOAMrad #NeuroRad #Neurology #Neurosurgery #stroke #Ophthalmology #Neuroophthalmology
Here is another nice case, this time of quadruple sectoranopia due to LGB infarct
via: @PracticalNeurol
pn.bmj.com/content/10/3/1…
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