Rose P K, Abrahams V C
Can J Physiol Pharmacol. 1978 Aug;56(4):650-8. doi: 10.1139/y78-103.
Experiments on chloralose-anaesthetized cats have shown that cells in the superior colliculus may be antidromically activated either from the pontomedullary reticular formation or the ventral cervical spinal cord, or from both sites. In tests on 111 units this has provided a basis for differentiating between cells of origin of the tectospinal tract and the tectoreticular system within the superior colliculus. Tectospinal cells may be activated both by spinal and pontine stimulation; tectoreticular cells cannot be activated by spinal stimulation. Both tectoreticular and tectospinal cells respond to visual and muscle afferent stimulation. The afferent connections may be strongly inhibitory as afferent input to the superior colliculus ofter prevented subsequent antidromic invasion. This was more commonly seen in tectospinal cells than tectoreticular cells. The distribution of the two cell populations within the superior colliculus was also found to be dissimilar. Evidence has also been obtained to suggest that the tectoreticular system, in part, consists of collaterals of the tectospinal tract.
对用氯醛糖麻醉的猫进行的实验表明，上丘中的细胞可能会被来自脑桥延髓网状结构或颈髓腹侧，或这两个部位的逆向激活。在对111个单位的测试中，这为区分上丘内顶盖脊髓束和顶盖网状系统的起源细胞提供了基础。顶盖脊髓细胞可被脊髓和脑桥刺激激活；顶盖网状细胞不能被脊髓刺激激活。顶盖网状细胞和顶盖脊髓细胞都对视觉和肌肉传入刺激有反应。传入连接可能具有强烈的抑制作用，因为对上丘的传入输入常常会阻止随后的逆向入侵。这在顶盖脊髓细胞中比在顶盖网状细胞中更常见。还发现这两种细胞群在上丘内的分布也不相同。也有证据表明，顶盖网状系统部分由顶盖脊髓束的侧支组成。
