The DREAMS K-complexes Database
Université de Mons
Faculté Polytechnique de Mons - TCTS Lab
31, Boulevard Dolez
B-7000 Mons (Belgium)
ph : +32 (65) 37.47.20
fax: +32 (65) 37.47.29
This K-complexes database was collected during the DREAMS project, to tune, train and test our automatic detection algorithms.
It consist of 10 excerpts of 30 minutes of central EEG channel (extracted from whole-night PSG recordings), annotated independently by two experts in K-complexes.
In order to facilitate future research and performance comparision, we decided to publish these data on Internet. Be simply aware that this DREAMS K-complexes Database of University of MONS - TCTS Laboratory (Stéphanie Devuyst, Thierry Dutoit) and Université Libre de Bruxelles - CHU de Charleroi Sleep Laboratory (Myriam Kerkhofs) is under terms of the Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0) License. Each use of this database and/or its content must be attributed to University of MONS - TCTS Laboratory (Stéphanie Devuyst, Thierry Dutoit) and Université Libre de Bruxelles - CHU de Charleroi Sleep Laboratory (Myriam Kerkhofs). Any other additional authorisations may be asked to email@example.com.
If you are interested in adding your own visual or automatic annotations, please contact me: firstname.lastname@example.org
Data were acquired in a sleep laboratory of a belgium hospital using a digital 32-channel polygraph (BrainnetTM System of MEDATEC, Brussels, Belgium). They consist of 10 polysomnographic recordings coming from healthy subjects. Two EOG channels (P8-A1, P18-A1), three EEG channels (CZ-A1 or C3-A1, FP1-A1 and O1-A1) and one submental EMG channel were recorded. The standard European Data Format (EDF) was used for storing. The sampling frequency was 200Hz.
A segment of 30 minutes of the central EEG channel was extracted from each whole-night recording for K-complexes scoring. These excerpts were given independently to two experts with the following recommendation regarding this annotation:
- K-complex must be a biphasic wave composed of a first negative sharp wave immediately followed by a slower positive component.
- It can occur isolated or by pair.
- It can be associated with spindles (before, after, or on it).
- Its duration should be at least 0.5s and no more than 1.5s.
- Its amplitude should be at least twice as high as the EEG background.
- The amplitude of the negative component should be at least 50% of the positive amplitude component.
- The minimum interval between successive K-complexes in slow wave sleep should be greater than 2s.
The corresponding whole night recordings were also previously scored in sleep stages according to the Rechtschaffen and Kales criteria, but no note of these stages quotations was given to the scorers. Unfortynately, the second expert has only annotated the first five excerpts.
|Name||Sampling frequency||Age||Sex||Time of the excerpt
(from the begining of the recording)
|Annoted channel||Nr. of K-complexes scored by expert1||Nr. of K-complexes scored by expert2|
|excerpt1||200Hz||20||Man||extracted from 02:00:00 to 02:30:00||CZ-A1||34||19|
|excerpt2||200Hz||23||Woman||extracted from 05:00:30 to 05:30:30||CZ-A1||45||8|
|excerpt3||200Hz||47||Woman||extracted from 06:06:00 to 06:36:00||CZ-A1||12||3|
|excerpt4||200Hz||24||Woman||extracted from 01:16:00 to 01:46:00||CZ-A1||78||14|
|excerpt5||200Hz||23||Woman||extracted from 07:15:00 to 07:45:00||CZ-A1||39||20|
|excerpt6||200Hz||23||Man||extracted from 00:10:00 to 00:40:00||CZ-A1||28||/|
|excerpt7||200Hz||27||Man||extracted from 02:20:00 to 02:50:00||CZ-A1||11||/|
|excerpt8||200Hz||46||Woman||extracted from 04:50:00 to 05:20:00||CZ-A1||4||/|
|excerpt9||200Hz||27||Man||extracted from 05:30:00 to 06:00:00||CZ-A1||5||/|
|excerpt10||200Hz||21||Woman||extracted from 02:30:00 to 03:00:00||CZ-A1||16||/|
Six files are available per excerpt (except for the five last excerpts, for which visual scoring 2 is absent):
You can download each file separately by doing "right-click" and "save target as" on the links below (in the table),
or you can directly download the entire database by clicking on this link: DatabaseKcomplexes.rar
|EDF||Central EEG||Automatic detection||Visual scoring 1||Visual scoring 2||Hypnogram|