Effects of cognitive demands on postmovement motor cortical deactivation

Yu Zu Wu, David M. Niddam, Chun Chuan Chen, Kwong Kum Liao, Chou Ming Cheng, Li Fen Chen, Po Lei Lee, Shyan Shiou Chen, Tzu Chen Yeh, Jen Chuen Hsieh

Research output: Contribution to journalArticle

6 Citations (Scopus)


Postmovement β-rebounds induced by different intermovement intervals were investigated using magnetoencephalography in 14 healthy participants to test the hypothesis that postmovement motor cortical deactivation over the primary motor cortex depends on movement-related cognitive demands. Shorter latency and lower amplitude in postmovement β-rebounds over the contralateral primary motor cortex were noted in the short-movement interval movement (repetitive finger lifting). Greater latency span of postmovement β-rebounds jittering using single-trial analysis in the long-movement interval movement (discrete finger lifting) was observed. The study elucidates that the temporal interval between two adjacent movements reflecting different degrees of cognitive demands can affect postmovement motor cortical deactivation in terms of postmovement β-rebounds latency and amplitude, and latency span of postmovement β-rebounds jittering. Postmovement motor cortical deactivation can reflect cognitive demands in addition to motor and somatosensory processing.

Original languageEnglish
Pages (from-to)371-375
Number of pages5
Issue number4
Publication statusPublished - 2006 Jun 21


  • Cognitive demands
  • Intermovement interval
  • Latency jittering
  • Magnetoencephalography
  • Postmovement β-rebound
  • Single-trial analysis

ASJC Scopus subject areas

  • Neuroscience(all)

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    Wu, Y. Z., Niddam, D. M., Chen, C. C., Liao, K. K., Cheng, C. M., Chen, L. F., Lee, P. L., Chen, S. S., Yeh, T. C., & Hsieh, J. C. (2006). Effects of cognitive demands on postmovement motor cortical deactivation. NeuroReport, 17(4), 371-375. https://doi.org/10.1097/01.wnr.0000198954.15692.07