( ( ( ( ( Normal reflexes ) , ) ( such ( as ( the ( knee ( jerk reflex ) ) ) ) ) ) , ) ( ( ( ( are diminished ) or ) ( ( may even ) disappear ) ) . ) )
(ROOT (S (NP (NP (JJ Normal) (NNS reflexes)) (, ,) (PP (JJ such) (IN as) (NP (DT the) (NN knee) (NN jerk) (NN reflex))) (, ,)) (VP (VP (VBP are) (VP (VBN diminished))) (CC or) (VP (MD may) (ADVP (RB even)) (VP (VB disappear)))) (. .)))
Normal reflexes, such as the knee jerk reflex, are diminished or may even disappear.
(ROOT (X (NP (DT The) (`` ``) (JJ knee-jerk) ('' '') (NN motion)) (SBAR (IN that) (S (NP (NNS people)) (ADVP (RB involuntarily)) (VP (VBP perform) (SBAR (IN after) (S (S (VP (VBG being) (VP (VBN struck) (PP (IN in) (NP (NP (DT the) (NN knee)) (PP (IN in) (NP (DT a) (JJ certain) (NN way)))))))) (VP (VBZ is) (NP (NP (DT an) (NN example)) (PP (IN of) (NP (DT a) (JJ reflex))))))))))))