50.牙髓內拉士克神經叢(plexus of Raschkow)存於下列何區?
(A)造牙本質母細胞層(Odontoblastic layer)
(B)細胞貧乏區(Cell-free zone of Weil)
(C)細胞豐富區(Cell-rich zone)
(D)髓柱區(Pulp core zone)
21.三叉神經之運動根受傷時,會引起下列何者之麻痺?
(A)二腹肌之後腹(posterior belly of the digastric muscle) (B)提腭帆肌(levator veli palatini muscle) (C)頰肌(buccinator muscle) (D)咬肌(masseter muscle)