palaeopallium

例句：

1. 1. Palaeopallium is a region of the brain that has not yet been fully understood.
   古脑是大脑中尚未完全理解的区域。
2. 2. Palaeopallium is believed to be involved in motor control and coordination.
   古脑被认为与运动控制和协调有关。
3. 3. Palaeopallium is thought to have evolved from a more primitive state.
   人们认为古脑是从一种更原始的状态进化而来的。