Over the past week PTA he has been more somnolent and difficult to arrouse. .
 Over the past week he has been alert and oriented
(ROOT (S (PP (IN Over) (NP (DT the) (JJ past) (NN week))) (NP (NNP PTA)) (NP (PRP he)) (VP (VBZ has) (VP (VBN been) (ADJP (JJR more) (JJ somnolent) (CC and) (JJ difficult)) (S (VP (TO to) (VP (VB arrouse)))))) (. .) (. .)))
(ROOT (S (PP (IN Over) (NP (DT the) (JJ past) (NN week))) (NP (PRP he)) (VP (VBZ has) (VP (VP (VBN been) (ADJP (JJ alert))) (CC and) (VP (VBN oriented))))))
( ( Over ( the ( past week ) ) ) ( PTA ( he ( ( ( has ( ( been ( more ( ( somnolent and ) difficult ) ) ) ( to arrouse ) ) ) . ) . ) ) ) )
( ( Over ( the ( past week ) ) ) ( he ( has ( ( ( been alert ) and ) oriented ) ) ) )