see also:

• stroke (CVA)
• neurology

• classic triad of:
  • miosis (constricted pupil)
  • partial ptosis
  • loss of hemifacial sweating (anhidrosis)
• ie. everything gets less or smaller

• brainstem stroke (CVA)
  • lateral medullary syndrome (Wallenberg's):
    • caused by occlusion of vertebral or post inf cerebellar artery
    • ipsilateral:
      • facial numbness
      • limb ataxia
      • Horner's syndrome
      • pain over the eye
    • contralateral:
      • pin prick and temperature loss in arm and leg
    • vertigo, nausea, hiccups, hoarseness, difficulty swallowing & diplopia
• migraine
• internal carotid artery dissection
• carotid artery ischaemia
• lesion apex of lung eg. Pancoast tumour
• middle cranial fossa neoplasm
• lesion of the primary neuron
• lesion of the postganglionic neuron
• trauma to the brachial plexus