Abstract spatial, but not body-related, visual information guides bimanual coordination.
Abstract spatial, but not body-related, visual information guides bimanual coordination.
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DOI：
10.1038/s41598-017-16860-x
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发表时间：
2017-12-01
影响因子：
4.6
通讯作者：
Heed T
中科院分区：
文献类型：
--
作者：
Brandes J;Rezvani F;Heed T
视觉空间信息在指导双手协调方面是至关重要的，但解剖因素也会调节双手任务的表现。视觉不仅传达抽象的空间信息，还传达与身体相关的方面，如姿势。在这里，我们问，是否，相应地，视觉信息诱导身体相关的，或仅仅是抽象的，感知空间限制在双手运动指导。人类参与者在相同或不同的方向上进行有节奏、对称和平行的双手食指运动。在所有姿势中，对称动作比平行动作更准确，但当同源肌肉同时活动时，比如用不同而不是相同方向的手进行平行动作时，也更准确。因此，知觉和解剖上的限制都很明显。我们用双手之间的一面镜子来操纵视觉反馈，用左手的图像代替右手的图像，创造出独立于右手真实运动的双手对称的视觉印象。对称镜反馈削弱了平行性，但与常规手视相比，改善了对称的双手性能。关键的是，这些调节是独立于手的姿势和肌肉同源性。因此，视觉反馈似乎只对空间有贡献，而对指导双手协调的与身体相关的解剖运动编码没有贡献。
Visual spatial information is paramount in guiding bimanual coordination, but anatomical factors, too, modulate performance in bimanual tasks. Vision conveys not only abstract spatial information, but also informs about body-related aspects such as posture. Here, we asked whether, accordingly, visual information induces body-related, or merely abstract, perceptual-spatial constraints in bimanual movement guidance. Human participants made rhythmic, symmetrical and parallel, bimanual index finger movements with the hands held in the same or different orientations. Performance was more accurate for symmetrical than parallel movements in all postures, but additionally when homologous muscles were concurrently active, such as when parallel movements were performed with differently rather than identically oriented hands. Thus, both perceptual and anatomical constraints were evident. We manipulated visual feedback with a mirror between the hands, replacing the image of the right with that of the left hand and creating the visual impression of bimanual symmetry independent of the right hand’s true movement. Symmetrical mirror feedback impaired parallel, but improved symmetrical bimanual performance compared with regular hand view. Critically, these modulations were independent of hand posture and muscle homology. Thus, visual feedback appears to contribute exclusively to spatial, but not to body-related, anatomical movement coding in the guidance of bimanual coordination.
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影响因子：
3.7
作者：
Brand J;Piccirelli M;Hepp-Reymond MC;Morari M;Michels L;Eng K
通讯作者：
Eng K
DOI：
10.3758/bf03208768
发表时间：
2006-05
期刊：
Perception & psychophysics
影响因子：
--
作者：
Holmes NP;Snijders HJ;Spence C
通讯作者：
Spence C
影响因子：
3.7
作者：
Bultitude JH;Juravle G;Spence C
通讯作者：
Spence C
影响因子：
5.8
作者：
Denwood, Matthew J.
通讯作者：
Denwood, Matthew J.
影响因子：
2
作者：
Franz, EA;Packman, T
通讯作者：
Packman, T