کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6257718 1612958 2014 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Research reportNeural basis of postural focus effect on concurrent postural and motor tasks: Phase-locked electroencephalogram responses
ترجمه فارسی عنوان
گزارش تحقیق غیر مستقیم بر تأثیر تمرکز موضعی بر وظایف همزمان و حرکتی همزمان: پاسخ الکتروانسفالوگرام فازی قفل شده
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
چکیده انگلیسی


- Quality of suprapostural task profits from postural control with VEF.
- Postural control with VEF adds to automaticity for a postural-suprapostural task.
- Postural focus affects N1, P2 temporal-spatial pattern in the fronto-central area.
- Postural focus affects phase-locked oscillations in delta, theta, and beta bands.
- ERP dynamics favor automaticity and low switch-cost for postural control with VEF.

Dual-task performance is strongly affected by the direction of attentional focus. This study investigated neural control of a postural-suprapostural procedure when postural focus strategy varied. Twelve adults concurrently conducted force-matching and maintained stabilometer stance with visual feedback on ankle movement (visual internal focus, VIF) and on stabilometer movement (visual external focus, VEF). Force-matching error, dynamics of ankle and stabilometer movements, and event-related potentials (ERPs) were registered. Postural control with VEF caused superior force-matching performance, more complex ankle movement, and stronger kinematic coupling between the ankle and stabilometer movements than postural control with VIF. The postural focus strategy also altered ERP temporal-spatial patterns. Postural control with VEF resulted in later N1 with less negativity around the bilateral fronto-central and contralateral sensorimotor areas, earlier P2 deflection with more positivity around the bilateral fronto-central and ipsilateral temporal areas, and late movement-related potential commencing in the left frontal-central area, as compared with postural control with VIF. The time-frequency distribution of the ERP principal component revealed phase-locked neural oscillations in the delta (1-4 Hz), theta (4-7 Hz), and beta (13-35 Hz) rhythms. The delta and theta rhythms were more pronounced prior to the timing of P2 positive deflection, and beta rebound was greater after the completion of force-matching in VEF condition than VIF condition. This study is the first to reveal the neural correlation of postural focusing effect on a postural-suprapostural task. Postural control with VEF takes advantage of efficient task-switching to facilitate autonomous postural response, in agreement with the “constrained-action” hypothesis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Behavioural Brain Research - Volume 274, 1 November 2014, Pages 95-107
نویسندگان
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