( ( ( Do n't ) ( ( open fingers ) ( by ( muscle action ) ) ) ) . )
(ROOT (S (VP (VB Do) (RB n't) (VP (VB open) (NP (NNS fingers)) (PP (IN by) (NP (NN muscle) (NN action))))) (. .)))
Don't open fingers by muscle action.
(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)))))))) (. .)))