Posterior Inferior Cerebellar Artery (PICA)

Summary

Coming soon...

Key Points

• Posterior Inferior Cerebellar Artery (PICA)
  • Also known as Lateral Medullary Syndrome or Wallenberg Syndrome
    • Loss of blood supply to lateral medulla
  • Area of lesion
    • Nucleus ambiguus (CN IX, X, XI)
      • Dysphagia, hoarseness, decreased gag reflex, hiccups
    • Vestibular nuclei (CN VIII)
      • Nausea/vomiting, vertigo, nystagmus
    • Spinothalamic tract
      • Decreased pain/temperature sensation from contralateral body
    • Spinal trigeminal nucleus (CN V)
      • Decreased sensation from ipsilateral face
    • Sympathetic fibers
      • Ipsilateral Horner syndrome
    • Inferior cerebellar peduncle
      • Cerebellar signs: Ipsilateral ataxia, dysmetria