The SS2 subset of the Montreal Archive of Sleep Studies (MASS) cohort is an open-access database of laboratory-based polysomnography (PSG) recordings defined as :
- 19 subjects (age 23.6±3.7 years, age range: 18-33 years)
- 8 males (age 24.3±4.2 years, age range: 19-33 years)
- 11 females (age 23.2±3.5 years, age range: 18-30 years)
- 19 PSG recordings (whole night) "* PSG.edf"
- 19 electrodes in the EEG montage
- reference is computed linked-ear (CLE)
- 4 EOG channels
- 1 bipolar EMG
- 1 ECG channel
- Respiratory thermistance
- 19 Sleep staging files "* Base.edf"
- Sleep stage scoring rules : R&K
- Page size (s) : 20
Notes: Sleep stage scoring does not necessarily start at the beginning of the PSG recording.
Sleep spindles and k-complexes scoring are available in the dataset named "SS2 Sleep Annotations" (https://doi.org/10.5683/SP3/Y889CS).