15. 小腦半球外部的普金氏細胞投射至下列何構造? (A) 頂核 (fastigial nucleus) (B) 球形核 (globose nucleus) 及栓狀核 (emboliform nucleus) (C) 齒核 (dentate nucleus) (D) 外側前庭核 (lateral vestibular nucleus)