延髓动脉的显微解剖观察

应用显微解剖方法观察了30例儿童脑延髓外部各群动脉的组成,并用透明法在立体解剖显微镜下观察了8例延髓内部各群动脉的形态特征、供应范围及其与外部动脉群的关系。延髓外部动脉分为前正中群、前外侧群、外侧群和后群。外部动脉穿入脑实质延续为内部相应的各群动脉。前正中群动脉供应中缝两侧包括舌下神经核、部分锥体束等结构。前外侧群动脉供应锥体束和下橄榄核。外侧群动脉供应延髓网状结构、脊丘束和迷走神经背核等。后群动脉至延髓上部逐渐消失,主要供应薄、楔束核等。

MICROANATOMICAL OBSERVATION OF ARTERIES OF HUMAN MEDULLA OBLONGATA

The external arteries of human medulla oblongata were examined and the internal arterial morphological features, distribution and the relation with the external arteries were investegated by using cleared slides of brain stem. The external arteries are divided into four groups: anteromedial group, anterolateral group, lateral group and posterior group. Those groups penetrate into the medulla and become corresponding groups of internal arteries. The anteromedial group of internal arteries supplies nervous structures on the sides of median line including hypoglossal nucleus and part of corticospinal tract The anterolateral group supplies corticospinal tract and inferior olivary nucleus. The lateral group supplies reticular formation, spinothalamic tract and dorsal vagal nucleus. Finally, the posterior group, gradually disappering at the upper part of medulla mainly supplies cuneat nucleus and gracile nucleus.