( ( Although ( ( ( postoperative testing ) ( of ( upper ( arm ( muscle function ) ) ) ) ) ( showed ( ( ( some weakness ) and ) ( impaired endurance ) ) ) ) ) ( , ( this ( ( was ( ( found equally ) ( ( ( ( in ( the ( ( surgically disturbed ) triceps ) ) ) and ) ( in ( the ( untouched ( elbow flexors ) ) ) ) ) ( and ( thus ( ( could not ) ( be ( ( attributed ( to ( motor ( nerve damage ) ) ) ) ( to ( the ( triceps muscle ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN Although) (S (NP (NP (JJ postoperative) (NN testing)) (PP (IN of) (NP (JJ upper) (NN arm) (NN muscle) (NN function)))) (VP (VBD showed) (NP (NP (DT some) (NN weakness)) (CC and) (NP (VBN impaired) (NNS endurance)))))) (, ,) (NP (DT this)) (VP (VBD was) (VP (VBN found) (ADVP (RB equally)) (UCP (PP (PP (IN in) (NP (DT the) (ADJP (ADVP (RB surgically)) (JJ disturbed)) (NNS triceps))) (CC and) (PP (IN in) (NP (DT the) (JJ untouched) (NN elbow) (NNS flexors)))) (CC and) (RB thus) (SBAR (S (VP (MD could) (RB not) (VP (VB be) (VP (VBN attributed) (PP (TO to) (NP (NN motor) (NN nerve) (NN damage))) (PP (TO to) (NP (DT the) (JJ triceps) (NN muscle))))))))))) (. .)))
Although postoperative testing of upper arm muscle function showed some weakness and impaired endurance, this was found equally in the surgically disturbed triceps and in the untouched elbow flexors and thus could not be attributed to motor nerve damage to the triceps muscle.
(ROOT (S (NP (DT The) (NNS triceps)) (VP (VBP help) (S (NP (DT the) (NN body)) (VP (VB extend) (NP (DT the) (NN arm))))) (. .)))