Dynamic cortical participation during bilateral, cyclical ankle movements: effects of Parkinson’s disease

Each file contains EEG signals, EMG signals, and kinematic data for one participant as MATLAB files (.mat). Each modality is stored as a structure.

There are two participant groups: 1) men with Parkinson's disease and 2) age- and sex-matched controls. Files with names starting with "PD" are for the first group, and files with names starting with "Ctrl" are for the second group.

Inside each file, EEG signals are stored in "data_eeg(i,j).file", where the index, i, indicates the task and the index, j, indicates the epoch. The signals were recorded during externally-paced (i=1) and self-paced (j=2) bilateral, anti-phasic, cyclical foot dori-/plantarflexion in the sitting position. For each task, the signals were recorded in three one-minute epochs.

Similalry, EMG signals and kinematic data are stored in

"data_mus(i,j).file" and "data_kin(i,j).file", respectively.

For EEG signals, the entry at (i,j).file has the size, m-by-n, where the index, m, indicates samples and the index, n, indicates EEG channels. The EEG signals were recorded at AFz, Fz, F1, F2, F3, F4, FCz, FC1, FC2, FC3, FC4, Cz, C1, C2, C3, C4, CPz, CP1, CP2, and Pz (i.e., n=1:20) according to

the 10-10 system. The EEG signals were sampled at 1200 Hz in microvolts.

For EMG signals, the entry at (i,j).file has the size, m-by-n, where the index, m, indicates samples and the index, n, indicates muscle. The EMG signals were recorded from the right tibialis anterior muscle, right medial gastrocnemius muscle, left tibialis anterior muscle, and left medial gastrocnemius muscle (i.e., n=1:4). The EMG signals were sampled at 2000 Hz in volts.

For kinematic data, the entry at (i,j).file has the size, m-by-n, where the index, m, indicates samples and the index, n, indicates the motion-capture marker location and direction. Motion-capture markers were placed bilaterally over the EEG electrode locations, AF7 and AF8, lateral epicondyles of the femur, lateral malleoli, and second metatarsal heads. n=1:3 contain the marker coordinates for AF8 in x, y, and z coordinates, where x indicates mediolateral direction, y indicates anteroposterior direction, and z indicates superior-inferior direction. n=4:6 contain the marker coordinates for the lateral epichondyle of the right femur in x, y, and z coordinates. Similarly, n=7:9 and n=10:12 contain the marker coordinates for the right lateral malleoli and right second metatarsal heads, respectively. Similalry, n=13:24 contain the marker coordinates for AF7, the lateral epichondyle of the left femur, the left lateral malleoli, and left second metatarsal heads. The kinematic data was sampled at 100 Hz in millimeters.