Podokinetic stimulation causes shifts in perception of straight ahead.
Podokinetic stimulation causes shifts in perception of straight ahead.
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DOI：
10.1007/s00221-010-2480-3
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发表时间：
2011-02
影响因子：
2
通讯作者：
Earhart, Gammon M.
中科院分区：
文献类型：
--
作者：
Scott, John T.;Lohnes, Corey A.;Horak, Fay B.;Earhart, Gammon M.
足动后旋转（PKAR）是一种现象，其中受试者在旋转跑步机上行走一段时间后，当被指示原地踏步时无意中旋转。PKAR已被证明在不同形式的运动之间转移，但尚未在非运动任务中进行测试。我们进行了两个实验，以评估PKAR对主观直前方的知觉和安静的站立姿势的影响。21名健康的年轻右撇子受试者在旋转跑步机上训练前后，用激光笔指向他们认为是主观的正前方，同时由动作捕捉系统记录下来。受试者在站立、坐在无靠背椅子和有靠背椅子上时执行指向任务。在训练期结束后，受试者表现出明显的主观向前移动，平均偏离中心29.1 ± 10.6度。这种效果是方向特异性的，取决于受试者是在顺时针方向还是逆时针方向训练。限制受试者在空间中旋转身体的能力的姿势会减少，但不会消除这种影响。这种影响存在于安静的站立中，甚至在不可能运动的坐姿中。如前所述，PKAR向非运动任务和跨运动形式的稳健转移与显示有限转移的分裂带适应相反。我们建议，不像分裂带适应，足动适应介导的脊髓上，空间方向领域，影响脊髓水平的电路运动。
Podokinetic after-rotation (PKAR) is a phenomenon in which subjects inadvertently rotate when instructed to step in place after a period of walking on a rotating treadmill. PKAR has been shown to transfer between different forms of locomotion, but has not been tested in a non-locomotor task. We conducted two experiments to assess effects of PKAR on perception of subjective straight ahead and on quiet standing posture. Twenty-one healthy young right-handed subjects pointed to what they perceived as their subjective straight ahead with a laser pointer while they were recorded by a motion capture system both before and after a training period on the rotating treadmill. Subjects performed the pointing task while standing, sitting on a chair without a back, and a chair with a back. After the training period, subjects demonstrated a significant shift in subjective straight ahead, pointing an average of 29.1 ± 10.6 degrees off of center. The effect was direction-specific, depending on whether subjects had trained in the clockwise or counter-clockwise direction. Postures that limited subjects’ ability to rotate the body in space resulted in reduction, but not elimination, of the effect. The effect was present in quiet standing and even in sitting postures where locomotion was not possible. The robust transfer of PKAR to non-locomotor tasks, and across locomotor forms as demonstrated previously, is in contrast to split-belt adaptations that show limited transfer. We propose that, unlike split-belt adaptations, podokinetic adaptations are mediated at supraspinal, spatial orientation areas that influences spinal-level circuits for locomotion.
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影响因子：
14.5
作者：
KARNATH, HO;CHRIST, K;HARTJE, W
通讯作者：
HARTJE, W
影响因子：
1.4
作者：
Earhart, Gammon M.
通讯作者：
Earhart, Gammon M.
影响因子：
2.9
作者：
Hong, Minna;Perlmutter, Joel S.;Earhart, Gammon M.
通讯作者：
Earhart, Gammon M.
影响因子：
2
作者：
Kluzik, JoAnn;Peterka, Robert J.;Horak, Fay B.
通讯作者：
Horak, Fay B.
影响因子：
2
作者：
Kluzik, J;Horak, FB;Peterka, RJ
通讯作者：
Peterka, RJ