( ( While ( ( normal aging ) ( often ( ( ( results ( in ( some ( memory loss ) ) ) ) , ) ( up ( until now ) ) ) ) ) ) ( , ( scientists ( ( have ( been ( unable ( to ( ( pinpoint changes ) ( in ( ( specific areas ) ( of ( ( the brain ) ( associated ( with degeneration ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN While) (S (NP (JJ normal) (VBG aging)) (ADVP (RB often)) (VP (VBZ results) (PP (IN in) (NP (DT some) (NN memory) (NN loss))) (, ,) (ADVP (RB up) (PP (IN until) (ADVP (RB now))))))) (, ,) (NP (NNS scientists)) (VP (VBP have) (VP (VBN been) (ADJP (JJ unable) (S (VP (TO to) (VP (VB pinpoint) (NP (NNS changes)) (PP (IN in) (NP (NP (JJ specific) (NNS areas)) (PP (IN of) (NP (NP (DT the) (NN brain)) (VP (VBN associated) (PP (IN with) (NP (NN degeneration)))))))))))))) (. .)))
While normal aging often results in some memory loss, up until now, scientists have been unable to pinpoint changes in specific areas of the brain associated with degeneration.
(ROOT (S (NP (JJ Specific) (NNS scents)) (VP (VBP are) (ADVP (RB often)) (VP (VBN associated) (PP (IN with) (NP (NNS memories))))) (. .)))