title: Invited commentary.
authors.affiliation: Department of Psychology, The University of Tennessee, Knoxville, TN 37996, USA. dcorbett@utk.edu
authors.forename: Daniela
authors.initials: D
authors.lastname: Corbetta
mesh_terms: D006801:Humans; D009068:Movement / Q000502:physiology*; D017711:Nonlinear Dynamics; D026741:Physical Therapy Modalities