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多选题
About the corticospinal tract, which of the following descriptions are correct.（ ）
A
It originates from the giant pyramidal cells (锥体细胞) of superior and middle parts of primary soma
B
It passes through the posterior limb of internal capsule (内囊后肢).
C
In the mesencephalon, it is situated in the intermediate 3/5 of crus cerebri (大脑脚底).
D
In the medulla oblongata, it located deep to the pyramid.
E
At the level of inferior end of medulla oblongata, the small part of the cordicospinal tract crosses
答案解析
正确答案：ABCD
