Effects of attentional dispersion on sensory-motor processing of anticipatory postural control during unilateral arm abduction

• Yaguchi, Chie

• Fujiwara, Katsuo

抄録

Objective: We investigated effects of attentional dispersion on sensory-motor processing of anticipatory postural control during unilateral arm abduction. Methods: Thirteen adults performed arm abduction under two types of attentional dispersion conditions. A target stimulus was presented with 30% probability in two- or three-positions. By cue signal presentation, subjects either focused their attention on one position or divided attention for two or three positions and abducted right arm for target stimulus. Event-related potentials and onset time of postural muscles were measured. Results: P1-N1 and N2 amplitudes decreased with attentional dispersion in both conditions, but P3 did not change. With attentional dispersion to three-positions, N2 latency increased and start of late CNV was delayed, and also the onset time of gluteus medius was late in correlation to the late CNV changings, with no changings in two-positions. Conclusions: With attentional dispersion, brain activation decreased in the area related to the sensory processing and especially in the stimulus discrimination area. With increasing attentional dispersion, the delay in motor preparation or anticipatory attention to target stimuli was related to the delay in stimulus discrimination and onset time of postural muscle activation.Significance: Effects of attentional dispersion on sensory-motor processing of anticipatory postural control were experimentally demonstrated.

収録刊行物

• Clinical Neurophysiology

  Clinical Neurophysiology 123 (7), 1361-1370, 2012-07-01

  Elsevier

詳細情報

• CRID: 1050564285904326400
• NII論文ID: 120003551631
• NII書誌ID: AA11309888
• ISSN: 13882457
• Web Site: http://hdl.handle.net/2297/29642
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles