应用HRP逆轴突传递法观察了20只大鼠腹侧被盖区向嗅结切的投射.将HRP注入一侧嗅结节,在注射同侧腹侧被盖区-A10区出现标记细胞.标记细胞主要分布于腹侧被盖区的外侧并以中1/3段最多,尾1/3段次之,吻侧1/3段最少,其数量由外向内递减.标记细胞形态多为大、中梭形,少量的大三角形细胞、大多极细胞.研究证明了腹侧被盖区向嗅结节投射,为边缘中脑多巴胺系统提供了形态学依据. The projections of the ventral tegmental area to the olfactory junction in 20 rats were observed by HRP reverse axon transmission.The HRP was injected into the olfactory nodule on one side and labeled cells appeared on the ipsilateral ventral tegmental area -A10. The labeled cells were mainly distributed in the lateral ventral tegmental area with the most 1/3, the last 1/3, the least 1/3 in the kiss, the number decreasing from the outside to the inside. The labeled cells were mostly large , Spindle-shaped, a small amount of large triangular cells, most of the polar cells.Studies have shown that the ventral tegmental area projects to the olfactory nodule, providing morphological evidence for the marginal mesencephalic dopamine system.