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应用动-静脉连续灌注与厚切片透明法,在手术显微镜下观测了60侧国人脑干(中脑和延髓)外部动脉和18侧内部动脉的来源、支数、行程、吻合、穿入点与分布范围。脑干动脉可分成前内群、前外群、外侧群和后群。各群动脉都有许多不同的来源,其穿入脑实质的穿入点,显示有集中的密集穿入区。中脑动脉的密集穿入区是脚间窝和大脑脚外侧沟;延髓是前正中裂和橄榄后沟。脑干表面存在纤细的软膜动脉网。在中脑和延髓关闭部,内部动脉呈向心性行走;在延髓开放部则行向第四脑室底。各群动脉的管径由前向后逐次减小,并均有较恒定的供血区。
The arterial-venous continuous perfusion and thick section opacity method were used to observe the origin, count, stroke, anastomosis and penetration point of the external arteries and 18 internal arteries in 60 sides of Chinese people under the operation microscope distribution area. Brainstem arteries can be divided into anterior group, anterior group, lateral group and posterior group. There are many different sources of arteries that penetrate into the parenchyma of the brain and show a concentrated and intensive penetration zone. Intensive penetration of the middle cerebral artery area is the fossa of the foot and lateral diencephalon ditch; medulla oblongata is the former midfissure and olivine ditch. Slender brachial arteries exist on the surface of the brainstem. In the midbrain and medulla oblongata closed department, the internal arteries walk to the heart; in medulla oblongata open line to the fourth ventricle. The diameter of each group of arteries decreased successively from anteroposterior to posterior and both had a constant blood supply area.