( ( Upon ( ( the performance ) ( of ( simple ( finger ( motor tasks ) ) ) ) ) ) ( , ( ( subjects ( with CBD ) ) ( ( ( experienced ( ( lower levels ) ( of ( activity ( in ( ( ( ( ( ( the ( parietal cortex ) ) , ) ( sensorimotor cortex ) ) , ) and ) ( supplementary ( motor cortex ) ) ) ) ) ) ) ) ( than ( ( those individuals ) ( tested ( in ( a ( control group ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN Upon) (NP (NP (DT the) (NN performance)) (PP (IN of) (NP (JJ simple) (NN finger) (NN motor) (NNS tasks))))) (, ,) (NP (NP (NNS subjects)) (PP (IN with) (NP (NNP CBD)))) (VP (VBD experienced) (NP (NP (JJR lower) (NNS levels)) (PP (IN of) (NP (NP (NN activity)) (PP (IN in) (NP (NP (DT the) (JJ parietal) (NN cortex)) (, ,) (NP (NN sensorimotor) (NN cortex)) (, ,) (CC and) (NP (JJ supplementary) (NN motor) (NN cortex))))))) (PP (IN than) (NP (NP (DT those) (NNS individuals)) (VP (VBN tested) (PP (IN in) (NP (DT a) (NN control) (NN group))))))) (. .)))
Upon the performance of simple finger motor tasks, subjects with CBD experienced lower levels of activity in the parietal cortex, sensorimotor cortex, and supplementary motor cortex than those individuals tested in a control group.
(ROOT (S (NP (JJ Muscle) (NNS groups)) (VP (VBP are) (VP (VBN controlled) (PP (IN by) (NP (DT the) (NN motor) (NN cortex))))) (. .)))