Naturalistic reach ECoG data

Electrocorticography (ECoG) data during detected naturalistic arm movement events for 12 subjects. Movement events are of the wrist contralateral to the hemisphere with electrodes implantated. Data is in MNE-Python epochs format, which includes ECoG recordings, electrode locations, and corresponding behavioral and environmental feature metadata. Files correspond to separate subjects and recording days, and the 'l' or 'r' in the filename indicates the contralateral arm.<br>File format (see https://mne.tools/dev/generated/mne.Epochs.html):<br> - epoch._data : ECoG time series segments, centered around contralateral wrist movement onset<br> - epoch.info['bads'] : indices of channels with abnormal activity during the recording day (based on high standard deviation or kurtosis)<br> - epoch.metadata : pandas dataframe with behavioral/environmental features; also indicates which events are false positives based on manual inspection<br> - epoch.info['chs'][i]['loc'][:3] : MNI coordinates (x,y,z) of ECoG electrodes

本数据集收录了12名受试者在检测到的自然手臂运动事件期间的皮层脑电（Electrocorticography, ECoG）数据。所记录的运动事件均为与植入电极的大脑半球对侧的手腕运动。数据采用MNE-Python的epochs格式存储，包含皮层脑电录制结果、电极位置信息，以及配套的行为与环境特征元数据。
数据集文件按不同受试者与记录天数拆分存储，文件名中的“l”或“r”用于标识对应对侧手臂。
文件格式说明（详见https://mne.tools/dev/generated/mne.Epochs.html）：
- `epoch._data`：以对侧手腕运动起始时刻为中心的皮层脑电时间序列片段
- `epoch.info['bads']`：本次录制当日异常活动通道的索引（基于高标准差或峰度异常判定）
- `epoch.metadata`：包含行为与环境特征的pandas数据框，同时通过人工检视标注了其中的假阳性事件
- `epoch.info['chs'][i]['loc'][:3]`：皮层脑电电极的MNI坐标（x、y、z）