( ( muscles ( and ( motor mechanisms ) ) ) ; )
(ROOT (NP (NP (NNS muscles) (CC and) (NN motor) (NNS mechanisms)) (: ;)))
muscles and motor mechanisms;
(ROOT (S (NP (JJ Muscle) (NNS groups)) (VP (VBP are) (VP (VBN controlled) (PP (IN by) (NP (DT the) (NN motor) (NN cortex))))) (. .)))