外侧群动脉分布于外侧丘系、中央束和网状结构；
The lateral group supplies the lateral lemniscus, central tegmental tract and reticular formation.
脑干动脉可分成前内群、前外群、外侧群和后群。
The arteries of the brain stem can be divided into four groups: the anteromedial, anterolateral, lateral and posterior arteries.
外侧群动脉供应延髓网状结构、脊丘束和迷走神经背核等。
The lateral group supplies reticular formation, spinothalamic tract and dorsal vagal nucleus.
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