( ( ( The size ) ( of ( ( cortical representation ) ( of muscles ) ) ) ) ( ( ( ( is less ) ( ( a function ) ( of ( the ( muscle mass ) ) ) ) ) ( than ( of ( precision ( of ( the ( muscle movements ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN size)) (PP (IN of) (NP (NP (JJ cortical) (NN representation)) (PP (IN of) (NP (NNS muscles)))))) (VP (VBZ is) (ADVP (RBR less)) (NP (NP (DT a) (NN function)) (PP (IN of) (NP (DT the) (NN muscle) (NN mass)))) (PP (IN than) (IN of) (NP (NP (NN precision)) (PP (IN of) (NP (DT the) (NN muscle) (NNS movements)))))) (. .)))
The size of cortical representation of muscles is less a function of the muscle mass than of precision of the muscle movements.
(ROOT (S (NP (JJ Intrinsic) (NNS muscles)) (VP (VBP allow) (NP (PRP$ your) (NNS fingers)) (S (VP (TO to) (VP (ADVP (RB also)) (VB make) (NP (NP (JJ precise) (NNS movements)) (PP (IN for) (NP (NNS actions)))))))) (. .)))