{"dataset":{"id":"60363","dataset_id":"on005207","name":"Surrey cEEGrid sleep data set","description":"This dataset comprises overnight sleep EEG recordings from 20 healthy participants, collected in spring 2017 as part of a wearable sleep monitoring study at the Surrey Clinical Research Centre. Recordings include full polysomnography (PSG) and around-the-ear cEEGrid measurements, with most subjects having both modalities recorded on the same night. The dataset supports comparison between conventional PSG and wearable cEEGrid sleep staging approaches.","owner_user_id":15,"status":"active","github_repo":"nemarDatasets/on005207","concept_doi":"10.82901/nemar.on005207","latest_version_doi":"10.82901/nemar.on005207.v1.0.0","created_at":"2026-06-26 15:01:49","updated_at":"2026-08-19 01:56:45","zenodo_concept_id":null,"is_sandbox":0,"visibility":"public","ezid_status":"public","enrichment_json":"{\n  \"version\": \"2.0\",\n  \"pipeline_stage\": \"validated\",\n  \"title\": \"Surrey cEEGrid sleep data set\",\n  \"description\": \"This dataset comprises overnight sleep EEG recordings from 20 healthy participants, collected in spring 2017 as part of a wearable sleep monitoring study at the Surrey Clinical Research Centre. Recordings include full polysomnography (PSG) and around-the-ear cEEGrid measurements, with most subjects having both modalities recorded on the same night. The dataset supports comparison between conventional PSG and wearable cEEGrid sleep staging approaches.\",\n  \"methods_description\": \"Participants underwent overnight sleep recordings with equipment mounted immediately prior to bedtime at the sleep laboratory of the Surrey Clinical Research Centre. Recordings consisted of full polysomnography (PSG) and/or around-the-ear cEEGrid EEG measurements, with no tasks performed by subjects during sleep. Alignment between cEEGrid and PSG recordings was not preserved during data collection, requiring post-hoc alignment processing shared as a derivative dataset ('aligned1').\",\n  \"license\": \"CC0\",\n  \"dataset_type\": \"raw\",\n  \"authors\": {\n    \"Kaare B. Mikkelsen\": {\n      \"orcid\": \"0000-0002-7360-8629\",\n      \"affiliations\": [\n        {\n          \"name\": \"Institute of Biomedical Engineering University of Oxford Oxford UK\"\n        },\n        {\n          \"name\": \"Department of Engineering Aarhus University Aarhus Denmark\"\n        }\n      ]\n    },\n    \"James K Ebajemito\": {},\n    \"Maria A Bonmati-Carrion\": {},\n    \"Nayantara Santhi\": {},\n    \"Victoria L Revell\": {},\n    \"Giuseppe Atzori\": {},\n    \"Laura Birch\": {},\n    \"Ciro Della Monica\": {},\n    \"Stefan Debener\": {},\n    \"Derk-Jan Dijk\": {},\n    \"Annette Sterr\": {},\n    \"Maarten De Vos\": {}\n  },\n  \"keywords\": [\n    {\n      \"term\": \"EEG\"\n    },\n    {\n      \"term\": \"Sleep\",\n      \"subject_scheme\": \"MeSH\",\n      \"value_uri\": \"http://id.nlm.nih.gov/mesh/D012890\"\n    },\n    {\n      \"term\": \"Polysomnography\",\n      \"subject_scheme\": \"MeSH\",\n      \"value_uri\": \"http://id.nlm.nih.gov/mesh/D017286\"\n    },\n    {\n      \"term\": \"cEEGrid\"\n    },\n    {\n      \"term\": \"sleep staging\"\n    },\n    {\n      \"term\": \"wearable EEG\"\n    },\n    {\n      \"term\": \"machine learning\"\n    }\n  ],\n  \"related_identifiers\": [\n    {\n      \"identifier\": \"https://github.com/nemarDatasets/on005207\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": \"10.1111/jsr.12786\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": \"10.18112/openneuro.ds005207.v1.0.0\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsDerivedFrom\"\n    },\n    {\n      \"identifier\": \"https://nemar.org/dataset/on005207\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    }\n  ],\n  \"resource_type_general\": \"Dataset\",\n  \"resource_type_specific\": \"EEG Dataset\",\n  \"modalities\": [\n    \"eeg\"\n  ],\n  \"sizes\": [\n    \"74.2 GB (377 files)\"\n  ],\n  \"formats\": [\n    \".AWD\",\n    \".bdf\",\n    \".csv\",\n    \".edf\",\n    \".fdt\",\n    \".json\",\n    \".m\",\n    \".mat\",\n    \".md\",\n    \".mlx\",\n    \".py\",\n    \".pyc\",\n    \".set\",\n    \".tsv\",\n    \".txt\",\n    \".xlsx\",\n    \".yml\"\n  ],\n  \"source_hash\": \"e92ccb81da3e6bb04673055b984e8d1278c80cfd72f60c76f0eb8f0c93651e6f\"\n}","last_activity_at":"2026-06-26 15:01:49","source":"openneuro","source_id":"ds005207","subject_count":20,"modalities":"eeg","age_min":null,"age_max":null,"file_size":74214622917,"total_files":608,"tasks":"sleep","metadata_columns_error":null,"staleness_warn_stage":null,"staleness_admin_notified_at":null,"authors":"Kaare B. Mikkelsen, James K Ebajemito, Maria A Bonmati-Carrion, Nayantara Santhi, Victoria L Revell, Giuseppe Atzori, Laura Birch, Ciro Della Monica, Stefan Debener, Derk-Jan Dijk, Annette Sterr, Maarten De Vos","license":"CC0","readme":"[![DOI](https://img.shields.io/badge/DOI-10.82901%2Fnemar.on005207-blue)](https://doi.org/10.82901/nemar.on005207)\n\nSurrey sleep data set\r\n\r\n**Overview**\r\n\r\nThis dataset was collected as part of a research project on wearable sleep monitoring which took place in spring 2017.\r\n\r\nThe data set contains nightly EEG recordings from 20 healthy participants ('subjects'). Some recordings are full polysomnography (PSG) measurements, others are cEEGrid measurements. Most subjects have both PSG and ceegrid recordings from the same night, though a few are missing one or the other.\r\n\r\n**Format**\r\n\r\nThe dataset is formatted according to the Brain Imaging Data Structure. See the 'dataset_description.json' file for the specific BIDS version used. The EEG data format chosen is the '.set' format of EEGLAB.\r\n\r\nFor more information, see the following link:\r\nhttps://bids-specification.readthedocs.io/en/stable/01-introduction.html\r\n\r\n\r\n**Task description**\r\n\r\nThe patient performed no tasks. The recording equipment was mounted immediately prior to bedtime, and the recordings took place at the sleep laboratory of the Surrey Clinical Research Centre.\r\n\r\nNote that due to a miscommunication during the study, alignment information between cEEGrid and PSG recordings has not been saved. This means that to obtain a useful comparison between the two methods, for instance to align the manual scoring with the cEEGrid recordings, some post processing has to be performed. In the derivative dataset, 'aligned1', we have shared our own best attempt at alignment. \r\n\r\nThe data set was previously described in the paper \r\n'Machine-learning-derived sleep–wake staging from around-the-ear electroencephalogram outperforms manual scoring and actigraphy', Mikkelsen et al 2018, https://doi.org/10.1111/jsr.12786\r\n\r\n**Contact**\r\n\r\nFor questions regarding this data set, contact: \r\nKaare Mikkelsen, Mikkelsen.kaare@ece.au.dk, https://orcid.org/0000-0002-7360-8629","bids_version":"1.7.0","sessions_count":1,"publish_date":null,"embedding_dirty":0,"license_tier":"public","zarr_status":"ready","zarr_converted_at":"2026-08-18 03:02:39","zarr_store_count":113,"zarr_index_etag":"faecf624daaa3bcf11ede9c2fc672d4c","zarr_source_commit":"77575ac117407e11292bd1aaea3238ba9aba587b","archive_status":"ready","archive_size":41540240277,"archive_retry_count":0,"records_status":"ready","archive_skip_reason":null,"zarr_errors":18,"zarr_failure_count":17,"zarr_deterministic":0,"zarr_failed_at":"2026-08-18 03:02:39","num_dataset_citations":2,"num_datapaper_citations":92,"n_channels":6,"electrode_system":"other","has_hed":0,"hed_version":null,"is_exemplar":0,"bytes_present":74213958524,"data_complete":1,"withdrawn_at":null,"withdrawn_reason":null,"archive_complete":null,"archive_absent_files":null,"archive_declared_files":null,"zarr_pool_breaks":null,"total_recording_duration":3971502.376,"recording_duration_min":1,"recording_duration_max":45506,"recording_count":130,"recordings_unavailable":17,"recordings_measured":113,"channel_count_min":2,"channel_count_max":27,"sampling_frequency":128,"power_line_frequency":50,"eeg_reference":"A1, A2","placement_scheme":"10/20","sweep_stamps":"{\"enrichment_updated_at\":\"2026-08-19 01:56:34\",\"metadata_updated_at\":\"2026-08-19 01:56:44\",\"archive_checked_at\":\"2026-06-26 15:46:01\",\"zarr_checked_at\":null,\"records_checked_at\":\"2026-06-26 15:14:33\",\"citations_updated_at\":\"2026-09-08 03:00:46\",\"channel_montage_checked_at\":\"2026-06-28 23:39:14\",\"hed_checked_at\":\"2026-06-30 05:12:55\",\"data_checked_at\":\"2026-08-19 03:00:16\",\"availability_report_at\":\"2026-07-23 01:23:07\",\"recording_stats_at\":\"2026-09-02 11:33:12\",\"signal_defaults_at\":\"2026-09-02 12:25:55\"}","participants":20,"num_citations":94,"latest_version":"v1.0.0","zarr_verify_status":null,"zarr_verified_at":null,"owner_username":"nemarAdmin","owner_github":"nemarAdmin","file_size_formatted":"69.12 GB","zarr_data_failures":{"count":17,"detail_ref":"zarr/index.json","compacted_by":"migration_0074"},"zarr_index_url":"https://zarr.nemar.org/on005207/zarr/index.json","attestation_deposit_type":null,"attestation_key_status":null,"attestation_deidentified":null,"attestation_no_duplicate":null,"attestation_upstream_source":null,"attestation_accepted_at":null}}