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大脑中动脉M1段及其穿通支的显微解剖研究 被引量:2

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摘要 目的:通过显微解剖观察大脑中动脉(MCA)M1段及其穿通动脉的形态、数量与行程,为临床前脑底部的显微外科手术提供依据。方法:在显微镜下对12具(24侧)经红色乳胶颈总动脉灌注染色的头颈部标本进行解剖,对大脑中动脉的M1段及其穿通支的位置、走行、分支类型、口径进行了观察和测量。结果:MCA起自颈内动脉(ICA)两终支中的较大一支。在起点处MCA的管径约2倍于大脑前动脉。水平(M1)段自ICA分叉部起点延伸至侧裂。MCA的中央支动脉(豆纹动脉)多起自M1段,分为内侧、外侧豆纹动脉两群。内侧豆纹动脉起自ICA分叉处附近的MCA近侧;另一较大的外侧组,起自M1段远侧。这些血管向上行通过前穿质供给基底节及其他脑深部结构。结论:M1段是颈内动脉的直接延续,豆纹动脉起自内侧壁多呈直角状容易引起栓塞,并且由于大脑中动脉段血流量高、压力大、易产生动脉瘤,其中MCA动脉瘤又多位于M1段。故熟悉大脑中动脉M1段的显微解剖结构,对脑血管病的诊断和治疗将大有裨益。
作者 牛子劲
出处 《中国社区医师(医学专业)》 2010年第20期7-7,共1页
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