Holtzman D A, Halpern M
State University of New York, Health Science Center, Brooklyn 11203.
J Morphol. 1990 Feb;203(2):123-40. doi: 10.1002/jmor.1052030202.
Newborn, unfed garter snakes (Thamnophis spp.) respond preferentially to aqueous extracts of natural prey items, and these responses are mediated by the vomeronasal system (VNS). Since the VNS, and possibly the olfactory system (OS), are functional at birth, we examined the ontogeny of VNS and OS structures in four embryonic stages and two postnatal ages in garter snakes. The results of this study show 1) significant changes in thickness of the receptor epithelia for both systems; 2) temporal differences in the innervation of the telencephalon for each system; and 3) concurrent development of primary and secondary projection sites in both systems. Possible interactions between different cell populations and their significance for morphogenesis are discussed.
新生的、未进食的束带蛇（美洲束带蛇属）对天然猎物的水提取物有优先反应，并且这些反应由犁鼻器系统（VNS）介导。由于犁鼻器系统以及可能的嗅觉系统（OS）在出生时就已具备功能，我们研究了束带蛇四个胚胎阶段和两个出生后年龄段的犁鼻器系统和嗅觉系统结构的个体发育。这项研究的结果表明：1）两个系统的受体上皮厚度有显著变化；2）每个系统对端脑的神经支配存在时间差异；3）两个系统中初级和次级投射位点同时发育。讨论了不同细胞群体之间可能的相互作用及其对形态发生的意义。
