Anatomia microquirurgica del segmento P1 de la arteria cerebral posterior / Microsurgical anatomy of the P1 posterior cerebral artery segment

Objective: This study was conducted to clarify the anatomy of the posterior cerebral artery P1 segment. Methods: Four formalin-fixed adults heads were examined using X6 to X40 magnification. The vessels were filled with colored silicon. Results: The branches arising from the P1 are: 1) the posterior thalamoperforating arteries; 2) the short and long circumflex branches; 3) the medial posterior choroidalartery; and 4)the meningeal branch of Davidoff and Schechter. Conclusion: the correct knowledge of the anatomy of the P1 segment of the posterior cerebral artery is very important in the treatment of lesions located in the interpeduncular cistern