The role of feedback in the production of skilled finger sequences

• DOI: 10.1152/jn.00319.2021
• Publication Date: 2022-03-02T18:30:56Z
• Authors: Nicola J. Popp; Carlos R. Hernand...; Paul L. Gribble; Jörn Diedrichsen
• Keywords: Sequence (biology); Visual feedback; Auditory feedback

Actions involving fine control of the hand, for example, grasping an object, rely heavily on sensory information from fingertips. Although integration feedback during execution individual movements is well understood, less known about use in skilled movement sequences. To address this gap, we trained participants to produce sequences finger a keyboard-like device over 4-day training period. Participants received haptic, visual, and auditory indicating occurrence each press. We then either transiently delayed or advanced single press by small amount time (30 60 ms). observed that rapidly adjusted their ongoing accelerating prolonging press, accordance with direction perturbation. Furthermore, could show rapid behavioral modulation was driven haptic feedback. these feedback-driven adjustments reduced size practice, they were still clearly present at end training. In contrast directionally specific effect perturbed perturbation resulted onset subsequent presses irrespective modality. This observation consistent hierarchical organization even very fast sequences, different levels reacting distinctly perturbations.