33. 內弓狀纖維 (internal arcuate fibers) 是直接源自於下列何者，並跨過中線到對側的上 行纖維？
(A)弓狀核 (arcuate nucleus)
(B)薄束核及楔狀核 (gracile and cuneate nuclei)
(C)三叉神經脊髓核 (spinal trigeminal nucleus)
(D)外側網狀核 (lateral reticular nucleus)

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統計： A(0), B(5), C(0), D(0), E(0) #897305