( ( When ( that happens ) ) ( , ( we ( ( can ( ( be sure ) ( that ( ( the ( parasympathetic ( nervous system ) ) ) ( is ( being neglected ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (DT that)) (VP (VBZ happens)))) (, ,) (NP (PRP we)) (VP (MD can) (VP (VB be) (ADJP (JJ sure)) (SBAR (IN that) (S (NP (DT the) (JJ parasympathetic) (JJ nervous) (NN system)) (VP (VBZ is) (VP (VBG being) (VP (VBN neglected)))))))) (. .)))
When that happens, we can be sure that the parasympathetic nervous system is being neglected.
(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)))))) (. .)))