The exine is composed of tectum, columellae, foot layer and endexine.

外由顶盖层、柱状层、底层及外内层所组成。

The tegmentum——tectum——tegmentum connections are only concerned with the mid-dle and deep layers of the superior colliculus.

被盖—顶盖—被盖只与上丘、深层有关。

The exine of pollen wall is of different electron density, the nexine dense and the sexine, comprising tectum, bacules, and foot layer, relatively thin.

外分为外层和内层，外层包括覆盖层、基粒棒和基足层等三层，内层只包含一层。

EPSPs with short latencies were concluded to be monosynaptic.Most IPSPs were generated through polysynaptic paths, but monosynaptic IPSPs were also recorded in the tectum.

短潜时EPSP可能是通过单突触进行传导，而大多数IPSP是通过多突触方式进行神经信息传递。