Gray matter 2)Intermediate zone Intermediolateral nucleus:中间外侧核 lies in segments T1-L3, containing 中央管 胸核 sym pathetic preganglionic neurons 胶状质 交感神经的低级中枢 后角边缘核 Sacral parasympathetic nucleus骶副 后角固有核 交感核: lies in segments S2~S4,副交 感神经的低级中枢 中间内侧核 ntermediomedial nucleus中间内侧核 for sensation of viscera 中间外侧核Gray matter ◼ Sacral parasympathetic nucleus 骶副 交感核： lies in segments S2~S4, 副交 感神经的低级中枢 ◼ Intermediomedial nucleus 中间内侧核: for sensation of viscera 2) Intermediate zone ◼ Intermediaolateral nucleus:中间外侧核 lies in segments T1~L3, containing sympathetic preganglionic neurons 交感神经的低级中枢