( ( The ( parasympathetic division ) ) ( ( ( is often ) ( referred ( to ( ( as ( the ( CRANIOSACRAL division ) ) ) ( of ( the ( visceral ( motor system ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ parasympathetic) (NN division)) (VP (VBZ is) (ADVP (RB often)) (VP (VBN referred) (PP (TO to) (NP (NP (RB as) (DT the) (JJ CRANIOSACRAL) (NN division)) (PP (IN of) (NP (DT the) (JJ visceral) (NN motor) (NN system))))))) (. .)))
The parasympathetic division  is often referred to as the CRANIOSACRAL division of the visceral motor system.
(ROOT (S (NP (DT The) (JJ parasympathetic) (NN system)) (VP (MD can) (ADVP (RB also)) (VP (VB be) (VP (VBN referred) (S (VP (TO to))) (PP (IN as) (NP (DT the) (JJ craniosacral) (NN system)))))) (. .)))