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Internal carotid artery segments (mnemonic)

Last revised by Daniel J Bell on 6 Mar 2019

The internal carotid artery segments, according to the Bouthillier classification, can be recalled by the following mnemonic:

  • C'mon Please Learn Carotid Clinical Organizing Classification


  • C: cervical segment
  • P: petrous segment
  • L: lacerum segment
  • C: cavernous segment
  • C: clinoid segment
  • O: ophthalmic segment
  • C: communicating segment

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