Baizer J S, Whitney J F, Bender D B
Department of Physiology, School of Medicine, University at Buffalo, NY 14226.
Exp Brain Res. 1991;86(3):467-70. doi: 10.1007/BF00230521.
We examined the distribution of labeled neurons in the parabigeminal nucleus of the monkey following injections of retrograde fluorescent tracers into the superior colliculus. The extent of the visual field representation included in the injection site was assessed from the location of labeled cells in striate cortex. The results suggest a rough topographic organization of the parabigeminal nucleus, with the lower quadrant represented anteriorly and the upper quadrant posteriorly. We also found bilateral projections from the parabigeminal nucleus to both superior colliculi, but the crossed projection appeared to terminate only in that part of the colliculus where the vertical meridian is represented. Parabigeminal cells with a crossed projection were larger than those projecting to the ipsilateral colliculus. The results suggest that the organization of the monkey's parabigemino-tectal system is fundamentally similar to that of many other vertebrates.
我们将逆行荧光示踪剂注入猴子的上丘，然后检查了标记神经元在其副视束核中的分布。根据纹状皮质中标记细胞的位置评估注射部位所包含的视野表征范围。结果表明副视束核存在大致的拓扑组织，下象限在前部代表，上象限在后部代表。我们还发现副视束核与双侧上丘之间存在投射，但交叉投射似乎仅终止于代表垂直子午线的丘的那一部分。具有交叉投射的副视束核细胞比投射到同侧上丘的细胞更大。结果表明，猴子的副视束 - 顶盖系统的组织与许多其他脊椎动物的基本相似。
