15. 下視丘之室旁核(paraventricular nucleus of the hypothalamus)可藉由下列那條徑路直接影響脊髓灰質內的自主神經核(autonomic nuclei)? (A)內縱束(medical longitudinal fasciculus) (B)背縱束(dorsal longitudinal fasciculus) (C)中央背蓋徑(central tegmental tract) (D)腹縱束(ventral longitudinal fasciculus)