Methods: 15 fresh postmortal adult brains were perfused with bright red emuls via internal carotid artery and vertebral artery,then dissected and observed under operative microscope in detail.

• 方法:采用15个成人新鲜头颅标本,颈内动脉及椎动脉灌注朱红乳胶后在手术显微镜下解剖观察。