Posture and gaze tracking of a vertically moving target reveals age-related constraints in visuo-motor coupling
作者： H. Sotirakis , A. Kyvelidou , N. Stergiou , V. Hatzitaki
DOI: 10.1016/J.NEULET.2017.06.024
关键词:
摘要: Abstract Previously we have demonstrated that the effect of aging on posture and gaze active tracking a visual target moving in horizontal direction is dependent target’s complexity. In this study, asked whether similar phenomenon present when with varying complexity vertical direction. Ten young (22.98 ± 2.9 years) 10 older adults (72.45 ± 4.72 years) tracked for 120 s, vertically by shifting their bodyweight anterior-posterior Three motions were tested: simple periodic (sine wave), more complex (Lorenz attractor) an ultra-complex random (Surrogated Lorenz pattern. Cross-spectral analysis revealed lower sway-target coherence as function age, regardless motion’s This age was significant gain but not phase index. Gaze-target related differences only targets. Regardless associated cross Approximate Entropy. It concluded targets oscillating reveals constraints are independent These evident spatial temporal aspects visuo-motor coupling, which suggests presence neuromuscular deficiencies controlling visually guided postural sway
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