Microanatomy of A1 segment of anterior cerebral artery and perforating branch of communicating artery complex
ZHANG Guang-hui, WANG Yu-hai
Chinese Journal of Clinical Anatomy ›› 2018, Vol. 36 ›› Issue (5) : 481-485.
Microanatomy of A1 segment of anterior cerebral artery and perforating branch of communicating artery complex
Objective By microanatomy of the anterior communicating artery complex (ACoAC) and its perforation artery, the anatomic basis would be provided to reduce the perforator - related complications of the anterior communicating artery aneurysm (ACoAA). Methods 15 cadaver heads(30 sides) were selected and fully exposed the A1 segment of the ACA and the ACoAC were performed. The number of perforating arteries, initial external diameter and distribution area were observed and measured under microscope. The A1 segment was divided into 6 regions (A~F area) according to the length. The characteristics of the perforating arteries in the 6 region were observed, to find the best temporary blocking area. 10 cadaver heads were filled with good perfusion of red latex in the arteries. The depth and distribution of the medullary branches of A1 segment and the Heubner returnee artery from the cerebral cortex to the cerebral pulp were observed and measured under the microscope. Results The length of the A1 segment of the ACA was （15.13±4.76）mm, from which the number of perforating artery was 244, including 63 in A area (25.82%), 54 in B area(22.13%), 51 in C area (20.90%), 31 in D area (12.70%), 20 in E area (8.20%), and 25 in F area (10.25%). There was no significant difference in the length, the number of perforating arteries and the external diameter of perforating artery between A1 segment and A2 segment of ACA. Conclusion Familiarity with the anatomic characteristics of the ACoAC and its perforating artery is the key to reduce or avoid perforating artery injury during operation. The E region of A1 segment can be used as the best temporary blocking area.
ACoAC / ACoAA / A1 segment of the ACA / Perforating artery； Microanatomy
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