{"dataset":{"id":"52509","dataset_id":"on003421","name":"HD-EEGtask(Dataset 2)","description":"This high-density EEG dataset comprises recordings from 20 healthy right-handed volunteers (10 females, 10 males, mean age 23 years) collected between 2014 and 2017 during four experimental conditions: resting state, visual naming, auditory naming, and working memory tasks. The dataset contains 256-channel EEG data acquired at 1000 Hz sampling frequency and is designed to investigate dynamic functional brain network reorganization across different cognitive states.","owner_user_id":15,"status":"active","github_repo":"nemarDatasets/on003421","concept_doi":"10.82901/nemar.on003421","latest_version_doi":"10.82901/nemar.on003421.v1.0.0","created_at":"2026-06-21 20:00:52","updated_at":"2026-07-10 22:15:05","zenodo_concept_id":null,"is_sandbox":0,"visibility":"public","ezid_status":"public","enrichment_json":"{\n  \"version\": \"2.0\",\n  \"pipeline_stage\": \"validated\",\n  \"title\": \"HD-EEGtask(Dataset 2)\",\n  \"description\": \"This high-density EEG dataset comprises recordings from 20 healthy right-handed volunteers (10 females, 10 males, mean age 23 years) collected between 2014 and 2017 during four experimental conditions: resting state, visual naming, auditory naming, and working memory tasks. The dataset contains 256-channel EEG data acquired at 1000 Hz sampling frequency and is designed to investigate dynamic functional brain network reorganization across different cognitive states.\",\n  \"methods_description\": \"HD-EEG recordings were acquired using a 256-electrode EGI system at 1000 Hz sampling frequency with impedances maintained below 5 kΩ. Four experimental conditions were performed: (1) resting state with eyes open for 10 minutes, (2) visual naming of 80 pictures with 40 scrambled distractors, (3) auditory naming of 80 sounds, and (4) working memory task with 80 pictures (40 repeated from naming task) requiring button press responses to indicate prior exposure.\",\n  \"license\": \"CC0\",\n  \"dataset_type\": \"raw\",\n  \"authors\": {\n    \"Ahmad Mheich\": {},\n    \"Olivier Dufor\": {},\n    \"Sahar Yassine\": {},\n    \"Aya Kabbara\": {},\n    \"Arnaud Biraben\": {},\n    \"Fabrice Wendling\": {},\n    \"Mahmoud Hassan\": {}\n  },\n  \"keywords\": [\n    {\n      \"term\": \"Electroencephalography\",\n      \"subject_scheme\": \"MeSH\",\n      \"value_uri\": \"http://id.nlm.nih.gov/mesh/D004569\"\n    },\n    {\n      \"term\": \"EEG\"\n    },\n    {\n      \"term\": \"resting state\"\n    },\n    {\n      \"term\": \"cognitive tasks\"\n    },\n    {\n      \"term\": \"visual naming\"\n    },\n    {\n      \"term\": \"auditory naming\"\n    },\n    {\n      \"term\": \"working memory\"\n    },\n    {\n      \"term\": \"functional brain networks\"\n    }\n  ],\n  \"related_identifiers\": [\n    {\n      \"identifier\": \"https://github.com/nemarDatasets/on003421\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": \"https://nemar.org/dataexplorer/detail?dataset_id=on003421\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": \"10.1038/s41598-017-02868-w\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsReferencedBy\"\n    },\n    {\n      \"identifier\": \"10.1016/j.cortex.2015.09.012\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsReferencedBy\"\n    },\n    {\n      \"identifier\": \"10.1088/1741-2552/aad5dd\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsReferencedBy\"\n    },\n    {\n      \"identifier\": \"10.18112/openneuro.ds003421.v1.0.2\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsDerivedFrom\"\n    }\n  ],\n  \"funding_references\": [\n    {\n      \"funder_name\": \"National Research Agency\",\n      \"award_number\": \"ANR-10-LABX-07-01\",\n      \"award_title\": \"CominLabs excellence laboratory\"\n    },\n    {\n      \"funder_name\": \"European Research Council\",\n      \"award_number\": \"290901\",\n      \"award_title\": \"NEUCOD\"\n    },\n    {\n      \"funder_name\": \"Rennes University Hospital\",\n      \"award_number\": \"2014-A01461-46\"\n    },\n    {\n      \"funder_name\": \"National Council for Scientific Research\"\n    },\n    {\n      \"funder_name\": \"Rennes University Hospital\",\n      \"award_title\": \"COREC Project BrainGraph\"\n    }\n  ],\n  \"resource_type_specific\": \"EEG Dataset\",\n  \"modalities\": [\n    \"eeg\"\n  ],\n  \"sizes\": [\n    \"82.4 GB (575 files)\"\n  ],\n  \"formats\": [\n    \".bmp\",\n    \".db\",\n    \".ebs2\",\n    \".eeg\",\n    \".es2\",\n    \".gitattributes\",\n    \".json\",\n    \".m\",\n    \".md\",\n    \".raw\",\n    \".tsv\",\n    \".vhdr\",\n    \".vmrk\",\n    \".wav\",\n    \".wndpos\",\n    \".xlsx\",\n    \".yml\"\n  ],\n  \"source_hash\": \"40dcc424e145303ad5d43e506ea9f3e20ee35311c66df5da35194ff2f7e799fc\"\n}","last_activity_at":"2026-06-21 20:00:52","source":"openneuro","source_id":"ds003421","subject_count":20,"modalities":"eeg","age_min":20,"age_max":40,"file_size":82433421828,"total_files":1033,"tasks":"PicturesNaming","metadata_columns_error":null,"staleness_warn_stage":null,"staleness_admin_notified_at":null,"authors":"Ahmad Mheich, Olivier Dufor, Sahar Yassine, Aya Kabbara, Arnaud Biraben, Fabrice Wendling, Mahmoud Hassan","license":"CC0","readme":"[![DOI](https://img.shields.io/badge/DOI-10.82901%2Fnemar.on003421-blue)](https://doi.org/10.82901/nemar.on003421)\n\n#    Dataset 2\n\n##   Presentation\n\n     This dataset was collected between 2014 and 2017 in Rennes (France) during four conditions (resting state, visual naming, auditory naming and working memory tasks).\n     All participants provided a written informed consent to participate in this study which was approved\n     by an independent ethics committee and authorized by the IRB \"Comite de Protection des Personnes\n     dans la Recherche Biomedicale Ouest V\" (CCPPRB-Ouest V). \n     The study name was \"Braingraph\" and study agreement number was 2014-A01461-46.\n     Its promoter was the Rennes University Hospital.\n\n     \n###  Participants\n\n     Twenty right-handed healthy volunteers (10 females, 10 males, mean age 23 years) participated \n     in this experiment. (See participants.json and participants.tsv for more details)\n\n\n#### Experiment\n\n     * The experiment begins with the verification of inclusion/exclusion criteria.\n     * The participants read the information notice and the consent form. \n     * Then they sign two questionnaires. \n     * One subject -->four conditions (resting state, visual naming, auditory naming and working memory).\n     * Resting state--> subject asked to relax for 10 min with their eyes open.\n     * Visual naming-->subject asked to name 80 pictures. 40 scrambled pictures were presented and participantس were asked to say nothing.\n     * Auditory naming--> subject asked to name 80 different sounds.\n     * Memory--> 80 pictures were displayed of which 40 have already been shown in the naming task. New pictures and already seen pictures randomly appeared on the screen and participants have to indicate if they have seen them before by pressing a button or not. \n\n\n\n#### EEG acquisition\n\n     * HD-EEG system (EGI, Electrical Geodesic Inc., 256 electrodes) \n     * Sampling frequency: 1000Hz\n     * Impedances were kept below 5k\n\n\n## Contact\n     * If you have any questions or comments, please contact: \n     * Ahmad Mheich: mheich.ahmad@gmail.com\n\n","bids_version":"1.2","sessions_count":4,"publish_date":null,"embedding_dirty":0,"license_tier":"public","zarr_status":"ready","zarr_converted_at":"2026-09-06 22:52:19","zarr_store_count":80,"zarr_index_etag":"4cfd5f1a784883358ff32ee8bc79c7e7","zarr_source_commit":"a9ddf43d113cab9949981949a0638e2fb7dfe71f","archive_status":"ready","archive_size":75694948285,"archive_retry_count":0,"records_status":"ready","archive_skip_reason":null,"zarr_errors":0,"zarr_failure_count":0,"zarr_deterministic":0,"zarr_failed_at":null,"num_dataset_citations":1,"num_datapaper_citations":0,"n_channels":257,"electrode_system":"egi-geodesic","has_hed":0,"hed_version":null,"is_exemplar":0,"bytes_present":82430894673,"data_complete":1,"withdrawn_at":null,"withdrawn_reason":null,"archive_complete":null,"archive_absent_files":null,"archive_declared_files":null,"zarr_pool_breaks":0,"total_recording_duration":41328.096,"recording_duration_min":166.376,"recording_duration_max":724.912,"recording_count":80,"recordings_unavailable":0,"recordings_measured":80,"channel_count_min":257,"channel_count_max":257,"sampling_frequency":1000,"power_line_frequency":60,"eeg_reference":"Cz","placement_scheme":null,"sweep_stamps":"{\"enrichment_updated_at\":\"2026-06-21 20:10:07\",\"metadata_updated_at\":\"2026-06-21 20:10:18\",\"archive_checked_at\":\"2026-06-21 20:58:15\",\"zarr_checked_at\":null,\"records_checked_at\":\"2026-06-21 20:11:23\",\"citations_updated_at\":\"2026-09-08 03:00:52\",\"channel_montage_checked_at\":\"2026-06-28 23:10:31\",\"hed_checked_at\":\"2026-06-30 04:42:05\",\"data_checked_at\":\"2026-07-31 03:01:02\",\"availability_report_at\":\"2026-07-23 01:13:38\",\"signal_defaults_at\":\"2026-09-02 11:58:43\",\"recording_stats_at\":\"2026-09-07 03:01:02\"}","participants":20,"num_citations":1,"latest_version":"v1.0.0","zarr_verify_status":null,"zarr_verified_at":null,"owner_username":"nemarAdmin","owner_github":"nemarAdmin","file_size_formatted":"76.77 GB","zarr_data_failures":null,"zarr_index_url":"https://zarr.nemar.org/on003421/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}}