ty -jour au -mezzina，giovanni au -de venuto，daniela py -2019 da -2019/12/31 ti-及时及时线性化反应性皮质响应，以早期检测到平衡损失SP -9570748 vl -2019 vl -2019 ab- ab- ab-瞄准at finding a fast and accurate preimpact fall detection (PIFD) strategy, this paper proposes a novel methodology that precociously discriminates the occurrence of unexpected loss of balance from the steady walking, by analyzing the subject’s cortical signal modifications (at the scalp level) in the time-frequency domain. In this study, the subjects were asked to walk at their preferred speed on the treadmill platform programmed to provide unexpected bilateral slippages. The proposed PIFD method exploits synchronously recorded electromyographic (EMG: 2 channels from the same lower limb muscle bundle, bilaterally) and electro-encephalographic (EEG: 13 channels from motor, sensory-motor and parietal cortex areas) signals. To validate the method offline, also, the lower limb kinematics has been reconstructed via a motion capture system (23 reflective markers and 8 fixed cameras). During the PIFD system functioning, the EMG signals from the lateral gastrocnemii are first translated in a binary waveform and then used to trigger the EEG analysis. Once enabled via EMG (every gait cycle), the EEG computation branch extracts and linearizes the rate of variation in the EEG power spectrum density (PSD) for five bands of interests: θ（4-7 Hz）， α（8-12 Hz）， β我， βII，， βIII节奏（13-15 Hz，16–20 Hz和21-28 Hz）。在这种情况下，线性化趋势的斜率标识了皮质反应性参数。六个受试者的实验结果表明，所提出的系统可以以〜96％的总体精度（灵敏度和特异性之间的平均值）区分平衡的丧失。歧视过程平均要求370.6 ms。该值可以被认为适合实施旨在恢复主题平衡的对策。SN -1687-725X UR -https：//doi.org/10.1155/2019/9570748 do -10.1155/2019/2019/9570748 JF-传感器杂志PB- Hindawi KW- ER- ER-