کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4349309 1296935 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Multimodal reference frame for the planning of vertical arms movements
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
Multimodal reference frame for the planning of vertical arms movements
چکیده انگلیسی

In this study we investigated the reference frames used to plan arm movements. Specifically, we asked whether the body axis, visual cues and graviception can each play a role in defining “up” and “down” in the planning and execution of movements along the vertical axis. Horizontal and vertical pointing movements were tested in two postures (upright and reclined) and two visual conditions (with and without vision) to identify possible effects of each of these cues on kinematics of movement. Movements were recorded using an optical 3D tracking system and analysis was conducted on velocity profiles of the hand. Despite a major effect of gravity, our analysis shows an effect of the movement direction with respect to the body axis when subjects were reclined with eyes closed. These results suggest that our CNS takes into account multimodal information about vertical in order to compute an optimal motor command that anticipates the effects of gravity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience Letters - Volume 423, Issue 3, 23 August 2007, Pages 211–215
نویسندگان
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