[Posterior Communicating Artery / Posterior Cerebral Artery]

Area of Science:

• Neuroanatomy
• Vascular Surgery
• Embryology

Background:

• A comprehensive understanding of vascular anatomy and embryological development is essential for the safe execution of endovascular procedures.
• The posterior cerebral artery and anterior choroidal artery exhibit complementary embryological origins, suggesting a potential interconnected vascular network.
• Numerous perforating arteries arise from the posterior communicating and posterior cerebral arteries, supplying critical brain structures.

Purpose of the Study:

• To highlight the clinical significance of specific perforating arteries, such as the tuberothalamic and thalamoperforating arteries, in preventing severe infarction.
• To emphasize the variability in perforator branching patterns influenced by basilar tip fusion types.
• To discuss the utility and limitations of tests like balloon occlusion and the Allcock test in predicting ischemic tolerance during intentional artery occlusion.

Main Methods:

• Review of embryological development of cerebral vasculature.
• Analysis of perforator origins from the posterior communicating and posterior cerebral arteries.
• Evaluation of diagnostic tests for predicting ischemic tolerance.

Main Results:

• The tuberothalamic and thalamoperforating arteries are clinically significant due to their association with severe infarction upon occlusion.
• Perforator branching patterns demonstrate variability contingent upon basilar tip fusion type.
• Balloon occlusion and Allcock tests offer some predictive value for ischemic tolerance but lack definitive accuracy.

Conclusions:

• Accurate prediction of ischemic tolerance during intentional artery occlusion remains challenging due to the absence of a definitive evaluation method.
• Close attention to flow disturbances in the cortical territory and local perforator impairment is necessary in cases of intentional artery occlusion.