( ( If ( ( reticular formation ) ( is ( blocked pharmacologically ) ) ) ) ; )
(ROOT (SBAR (IN If) (S (NP (NN reticular) (NN formation)) (VP (VBZ is) (VP (VBN blocked) (ADVP (RB pharmacologically))))) (: ;)))
If reticular formation is blocked pharmacologically;
(ROOT (S (NP (JJ Reticular) (NN formation)) (VP (VBZ is) (NP (NP (DT the) (NN name)) (PP (IN of) (NP (NP (DT the) (NN formation)) (SBAR (WHNP (WDT that)) (S (VP (VBZ regulates) (NP (NN sleep) (CC and) (NN arousal))))))))) (. .)))