TY - JOUR

T1 - Progressive practice promotes motor learning and repeated transient increases in corticospinal excitability across multiple days

AU - Christiansen, Lasse

AU - Madsen, Mads Alexander Just

AU - Bojsen-Møller, Emil

AU - Thomas, Richard

AU - Nielsen, Jens Bo

AU - Lundbye-Jensen, Jesper

N1 - CURIS 2018 NEXS 048

PY - 2018

Y1 - 2018

N2 - Background: A session of motor skill learning is accompanied by transient increases in corticospinal excitability (CSE), which are thought to reflect acute changes in neuronal connectivity associated with improvements in sensorimotor performance. Factors influencing changes in excitability and motor skillwith continued practice remain however to be elucidated.Objective/Hypothesis: Here we investigate the hypothesis that progressive motor practice during consecutive days can induce repeated transient increases in corticospinal excitability and promote motor skill learning.Methods: Changes in motor performance and CSE were assessed during 4 consecutive days of skill learning and 8 days after the last practice session. CSE was assessed as area under recruitment curves (RC) using transcranial magnetic stimulation (TMS). Two groups of participants (n = 12) practiced a visuomotortracking-task with task difficulty progressively increased with individual proficiency (PPG) or with the same task level throughout all 4 days (NPPG).Results: Progressive practice resulted in superior motor learning compared to NPPG (p < 0.001). Whereas NPPG displayed increased CSE following only the first day of practice (p < 0.001), progressive motor practice was accompanied by increases in CSE on both the first and the final session of motor practice (p = 0.006). Eight days after ended practice, the groups showed similar CSE, but PPG maintained superior performance at a skilled task level and transfer task performance (p < 0.005, p = 0.029).Conclusion: The results demonstrate that progressive practice promotes both motor learning and repeated increases in CSE across multiple days. While changes in CSE did not relate to learning our results suggest that they signify successful training. Progressive practice is thus important for optimizingneurorehabilitation and motor practice protocols in general.

AB - Background: A session of motor skill learning is accompanied by transient increases in corticospinal excitability (CSE), which are thought to reflect acute changes in neuronal connectivity associated with improvements in sensorimotor performance. Factors influencing changes in excitability and motor skillwith continued practice remain however to be elucidated.Objective/Hypothesis: Here we investigate the hypothesis that progressive motor practice during consecutive days can induce repeated transient increases in corticospinal excitability and promote motor skill learning.Methods: Changes in motor performance and CSE were assessed during 4 consecutive days of skill learning and 8 days after the last practice session. CSE was assessed as area under recruitment curves (RC) using transcranial magnetic stimulation (TMS). Two groups of participants (n = 12) practiced a visuomotortracking-task with task difficulty progressively increased with individual proficiency (PPG) or with the same task level throughout all 4 days (NPPG).Results: Progressive practice resulted in superior motor learning compared to NPPG (p < 0.001). Whereas NPPG displayed increased CSE following only the first day of practice (p < 0.001), progressive motor practice was accompanied by increases in CSE on both the first and the final session of motor practice (p = 0.006). Eight days after ended practice, the groups showed similar CSE, but PPG maintained superior performance at a skilled task level and transfer task performance (p < 0.005, p = 0.029).Conclusion: The results demonstrate that progressive practice promotes both motor learning and repeated increases in CSE across multiple days. While changes in CSE did not relate to learning our results suggest that they signify successful training. Progressive practice is thus important for optimizingneurorehabilitation and motor practice protocols in general.

KW - Faculty of Science

KW - TMS

KW - Learning

KW - Plasticity

KW - Corticospinal excitability

U2 - 10.1016/j.brs.2017.11.005

DO - 10.1016/j.brs.2017.11.005

M3 - Journal article

C2 - 29187320

VL - 11

SP - 346

EP - 357

JO - Brain Stimulation

JF - Brain Stimulation

SN - 1935-861X

IS - 2

ER -