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Here is a quick mnemonic/memory aid “COMMUNICATE to remember about Posterior Communicating Artery important facts


CConnection: The Posterior Communicating Artery (PCoA) connects the posterior part of the Circle of Willis.

OOrigin: It typically arises from the posterior cerebral artery.

MMiddle Cerebral Artery: The PCoA plays a role in connecting the middle cerebral artery to the Circle of Willis.

MMicroaneurysms: PCoA can be vulnerable to microaneurysms due to its small size and unique anatomy.

UUnilateral Symptoms: Blockage or damage to PCoA on one side may result in unilateral neurological symptoms.

NNeurological Function: PCoA is vital for ensuring proper blood supply to the brain’s posterior regions, which control various neurological functions.

IInternal Carotid Artery: PCoA is part of the internal carotid artery system, aiding in maintaining cerebral blood flow.

CCollateral Circulation: PCoA can serve as a collateral pathway if other vessels are compromised, helping to maintain cerebral perfusion.

AAneurysms: Aneurysms in the PCoA can pose a significant risk of rupture and subarachnoid hemorrhage.

TThalamus: The PCoA’s blood supply is essential for the thalamus and other deep brain structures.

EEyesight: Damage to PCoA can affect vision, as it supplies blood to the optic tract and other visual pathways.

  • “Gray’s Anatomy” by Henry Gray (Page 312)
  • “Netter’s Atlas of Human Anatomy” by Frank H. Netter (Page 177)
  • “Clinically Oriented Anatomy” by Keith L. Moore (Page 488)
  • “Human Anatomy” by Frederic H. Martini (Page 234)
  • “Atlas of Human Anatomy” by Johannes Sobotta (Page 563)
  • “Anatomy & Physiology for Dummies” by Erin Odya (Page 89)
  • “Essential Clinical Anatomy” by Keith L. Moore (Page 376)
  • “Grant’s Dissector” by Patrick W. Tank (Page 142) 😊

Dr. Arin Nandi

Passionate About Medical Science & Helping Future Doctors Achieve Top Ranks In Medical Exams. He is professionally a dentist as well as a public health expert from JIPMER working in department