Plastic changes in interhemispheric inhibition with practice of a two-hand force production task: a transcranial magnetic stimulation study.
We studied the effects of practice of an unusual two-hand finger force production task on electromyographic and force responses to transcranial magnetic stimulation (TMS). Prior to practice, force production by a hand resulted in decreased TMS-induced responses in the other hand. After practice, fingers that were explicitly required to produce force during practice showed a significant drop in these inhibitory effects, while other fingers did not. We conclude that interhemispheric inhibitory projections can show plastic changes that favor the execution of a practiced task.
Shim
Jae Kun
JK
Department of Kinesiology, Rec. Hall-267, The Pennsylvania State University, University Park, PA 16802, USA.
Kim
Sun Wook
SW
Oh
Seung Ja
SJ
Kang
Ning
N
Zatsiorsky
Vladimir M
VM
Latash
Mark L
ML
D000328:Adult; D000704:Analysis of Variance; D004558:Electric Stimulation; D004576:Electromyography / Q000379:methods; D019054:Evoked Potentials, Motor / Q000528:radiation effects; D005260:Female; D005385:Fingers / Q000502:physiology / Q000528:radiation effects*; D007839:Functional Laterality / Q000502:physiology; D018737:Hand Strength; D006801:Humans; D007266:Inhibition, Psychological; D016014:Linear Models; D011214:Practice, Psychological; D011597:Psychomotor Performance / Q000502:physiology*; D050781:Transcranial Magnetic Stimulation