BIDS-formatted version of the Hyser Surface EMG for Hand Gesture Recognition dataset (Jiang et al., 2021). 20 subjects performed 5 task types across 2 sessions using 256-channel high-density surface EMG (HD-sEMG) with simultaneous 5-finger force recordings.
20 right-handed participants (12M, 8F; age 21-34). Two sessions per subject separated by 3-25 days. Demographics in participants.tsv.
| Task | BIDS label | Description | Trials |
|---|---|---|---|
| Pattern Recognition | gesture01-gesture34 |
34 discrete hand gestures (Table I in paper) | 2 per gesture, each with 3 dynamic + 1 maintenance |
| Maximum Voluntary Contraction | mvc |
MVC flexion/extension per finger | 2 per finger, 10s each |
| Single Finger (1-DOF) | singlefinger |
Triangle force trajectory, individual fingers | 3 per finger, 25s each |
| Multi-Finger (N-DOF) | multifinger |
Simultaneous multi-finger force tracking | 2 per combination, 25s each |
| Random | random |
Free finger contractions at any force | 5 trials, 25s each |
- EMG system: Quattrocento (OT Bioelettronica, Torino, Italy), 2048 Hz, gain 150, 16-bit ADC
- Electrodes: Four 8x8 gelled elliptical arrays (5mm x 2.8mm), 10mm inter-electrode distance
- Placement: Two arrays on extensors (distal/proximal), two on flexors (distal/proximal) of right forearm
- Reference: Olecranon (elbow); Ground: head of ulna (right leg drive)
- Hardware filters: HP 10 Hz (2nd order), LP 500 Hz
- Force sensors: SAS + HSGA (Huatran, Shenzhen, China), 100 Hz, 5 fingers
*_emg.bdf- 256-channel EMG data (BDF format)*_physio.tsv.gz- 5-finger force data (non-PR tasks only)*_channels.tsv- Channel metadata with electrode mapping (signal_electrodecolumn)*_electrodes.tsv- Electrode positions in local grid coordinates (mm)*_events.tsv- Event markers (gesture trials or segment boundaries)
Non-PR tasks (MVC, singlefinger, multifinger, random) are merged from multiple original recordings into single files per session, with boundary events marking segment junctions.
Four local grid systems (space-ed, space-ep, space-fd, space-fp) in mm, anchored to a parent forearm system (space-forearm) in anatomical percent coordinates. See space-*_coordsystem.json files.
6 gesture recordings absent in source dataset (not conversion failures): sub-01/ses-2/gesture25, sub-03/ses-1/gesture04, sub-03/ses-2/gesture04, sub-05/ses-1/gesture34, sub-11/ses-1/gesture08, sub-19/ses-2/gesture11.
Converted using EMG-2-BIDS (EEGLAB + bids-matlab-tools). Data integrity verified: mean Pearson correlation >0.9999 between original WFDB and converted BDF across all 1514 recordings. See dataset_description.json for generator details.