@article{ref1,
title="Noninvasive EEG correlates of overground and stair walking",
journal="Conference proceedings - IEEE engineering in medicine and biology society",
year="2016",
author="Brantley, Justin A. and Luu, Trieu Phat and Ozdemir, Recep and Zhu, Fangshi and Winslow, Anna T. and Huang, Helen and Contreras-Vidal, Jose L. and Brantley, Justin A. and Luu, Trieu Phat and Ozdemir, Recep and Zhu, Fangshi and Winslow, Anna T. and Huang, Helen and Contreras-Vidal, Jose L. and Zhu, Fangshi and Ozdemir, Recep and Brantley, Justin A. and Huang, Helen and Winslow, Anna T. and Contreras-Vidal, Jose L. and Luu, Trieu Phat",
volume="2016",
number="",
pages="5729-5732",
abstract="Automated walking intention detection remains a challenge in lower-limb neuroprosthetic systems. Here, we assess the feasibility of extracting motor intent from scalp electroencephalography (EEG). First, we evaluated the corticomuscular coherence between central EEG electrodes (C1, Cz, C2) and muscles of the shank and thigh during walking on level ground and stairs. Second, we trained decoders to predict the linear envelope of the surface electromyogram (EMG). We observed significant EEG-led corticomuscular coupling between electrodes and sEMG (tibialis anterior) in the high delta (3-4 Hz) and low theta (4-5 Hz) frequency bands during level walking, indicating efferent signaling from the cortex to peripheral motor neurons. The coherence was increased between EEG and vastus lateralis and tibialis anterior in the delta band (<; 2 Hz) during stair ascent, indicating a task specific modulation in corticomuscular coupling. However, EMG was the leading signal for biceps femoris and gastrocnemius coherence during stair ascent, possibly representing afferent feedback loops from periphery to the motor cortex. Decoder validation showed that EEG signals contained information about the sEMG patterns during over ground walking, however, the accuracy of the predicted sEMG patterns decreased during the stair condition. Overall, these initial findings support the feasibility of integrating sEMG and EEG into a hybrid decoder for volitional control of lower limb neuroprostheses.<p /> <p>Language: en</p>",
language="en",
issn="1557-170X",
doi="10.1109/EMBC.2016.7592028",
url="http://dx.doi.org/10.1109/EMBC.2016.7592028"
}