Gruberg E R, Kicliter E, Newman E A, Kass L, Hartline P H
J Comp Neurol. 1979 Nov 1;188(1):31-41. doi: 10.1002/cne.901880104.
We have studied the connections of the tectum of the rattlesnake by tectal application of horseradish peroxidase. The tectum receives bilateral input from nucleus lentiformis mesencephali, posterolateral tegmental nuclei, anterior tegmental nuclei and periventricular nuclei; ipsilateral input from nucleus geniculatus pretectalis, and lateral geniculate nucleus pars dorsalis; and contralateral input from dorso-lateral posterior tegmental nucleus and the previously undescribed nucleus reticularis caloris (RC). RC is located on the ventro-lateral surface of the medulla and consists of large cells 25--45 micrometer in diameter. Efferent projections from the tectum can be traced to the ipsilateral nucleus lentiformis mesencephali, the ipsilateral lateral geniculate region, anterior tegmental region and a wide bilateral area of the neuropil of the ventral tegmentum and ventral medualla. We have not found any direct tectal projections from the sensory trigeminal nuclei including the nucleus of the lateral descending trigeminal tract (LTTD). We suggest that in the rattlesnake, RC is the intermediate link connecting LTTD to the tectum.
我们通过在响尾蛇顶盖应用辣根过氧化物酶来研究顶盖的连接。顶盖接受来自中脑豆状核、后外侧被盖核、前被盖核和脑室周围核的双侧输入；来自顶盖前膝状核和外侧膝状体背侧部的同侧输入；以及来自背外侧后被盖核和先前未描述的热网状核（RC）的对侧输入。RC位于延髓腹外侧表面，由直径为25 - 45微米的大细胞组成。顶盖的传出投射可追溯到同侧中脑豆状核、同侧外侧膝状体区域、前被盖区域以及腹侧被盖和腹侧延髓神经毡的广泛双侧区域。我们未发现包括外侧下行三叉神经束核（LTTD）在内的感觉三叉神经核有任何直接的顶盖投射。我们认为在响尾蛇中，RC是连接LTTD和顶盖的中间环节。
