{"dataset":{"id":"54120","dataset_id":"on003694","name":"MEGMEM","description":"MEGMEM is a magnetoencephalography (MEG) dataset acquired during a memory task designed to investigate neural mechanisms of episodic memory encoding and retrieval. The dataset contains raw MEG recordings from multiple subjects performing structured memory experiments, providing a resource for studying oscillatory dynamics and neural correlates of memory processes.","owner_user_id":15,"status":"active","github_repo":"nemarDatasets/on003694","concept_doi":"10.82901/nemar.on003694","latest_version_doi":"10.82901/nemar.on003694.v1.0.0","created_at":"2026-06-22 11:31:13","updated_at":"2026-07-10 22:19:08","zenodo_concept_id":null,"is_sandbox":0,"visibility":"public","ezid_status":"public","enrichment_json":"{\n \"version\": \"2.0\",\n \"pipeline_stage\": \"validated\",\n \"title\": \"MEGMEM\",\n \"description\": \"MEGMEM is a magnetoencephalography (MEG) dataset acquired during a memory task designed to investigate neural mechanisms of episodic memory encoding and retrieval. The dataset contains raw MEG recordings from multiple subjects performing structured memory experiments, providing a resource for studying oscillatory dynamics and neural correlates of memory processes.\",\n \"license\": \"CC0\",\n \"dataset_type\": \"raw\",\n \"authors\": {\n \"Benjamin J. Griffiths\": {\n \"orcid\": \"0000-0001-8600-4480\"\n },\n \"María Carmen Martín-Buro\": {\n \"orcid\": \"0000-0003-0578-2825\"\n },\n \"Bernhard Staresina\": {\n \"orcid\": \"0000-0002-0558-9745\"\n },\n \"Simon Hanslmayr\": {\n \"orcid\": \"0000-0003-4448-2147\"\n }\n },\n \"keywords\": [\n {\n \"term\": \"MEG\"\n },\n {\n \"term\": \"episodic memory\"\n },\n {\n \"term\": \"memory encoding\"\n },\n {\n \"term\": \"memory retrieval\"\n },\n {\n \"term\": \"oscillatory dynamics\"\n },\n {\n \"term\": \"neuroimaging\"\n }\n ],\n \"related_identifiers\": [\n {\n \"identifier\": \"https://github.com/nemarDatasets/on003694\",\n \"identifier_type\": \"URL\",\n \"relation_type\": \"IsDescribedBy\"\n },\n {\n \"identifier\": \"https://nemar.org/dataexplorer/detail?dataset_id=on003694\",\n \"identifier_type\": \"URL\",\n \"relation_type\": \"IsDescribedBy\"\n },\n {\n \"identifier\": \"10.1101/2020.01.22.915330\",\n \"identifier_type\": \"DOI\",\n \"relation_type\": \"IsDescribedBy\"\n },\n {\n \"identifier\": \"10.18112/openneuro.ds003694.v1.0.0\",\n \"identifier_type\": \"DOI\",\n \"relation_type\": \"IsDerivedFrom\"\n }\n ],\n \"resource_type_general\": \"Dataset\",\n \"resource_type_specific\": \"MEG Dataset\",\n \"modalities\": [\n \"meg\"\n ],\n \"sizes\": [\n \"234.6 GB (133 files)\"\n ],\n \"formats\": [\n \".fif\",\n \".gitattributes\",\n \".json\",\n \".md\",\n \".tsv\",\n \".yml\"\n ],\n \"source_hash\": \"cc7b8c24dcf315b06cdf723763d69e565283e217f812bea97be7e2e43a81cd06\"\n}","last_activity_at":"2026-06-22 11:31:13","source":"openneuro","source_id":"ds003694","subject_count":28,"modalities":"meg","age_min":null,"age_max":null,"file_size":234581979367,"total_files":537,"tasks":"MEM","metadata_columns_error":null,"staleness_warn_stage":null,"staleness_admin_notified_at":null,"authors":"Benjamin J. Griffiths, María Carmen Martín-Buro, Bernhard Staresina, Simon Hanslmayr","license":"CC0","readme":"[![DOI](https://img.shields.io/badge/DOI-10.82901%2Fnemar.on003694-blue)](https://doi.org/10.82901/nemar.on003694)\n\n\n## Provenance\n\nThis dataset is mirrored on NEMAR from OpenNeuro.\n\n- Source: [ds003694](https://openneuro.org/datasets/ds003694)\n- DOI: [10.18112/openneuro.ds003694.v1.0.0](https://doi.org/10.18112/openneuro.ds003694.v1.0.0)\n","bids_version":"1.0.2","sessions_count":null,"publish_date":null,"embedding_dirty":0,"license_tier":"public","zarr_status":"ready","zarr_converted_at":"2026-09-08 03:35:58","zarr_store_count":28,"zarr_index_etag":"e9599a75fd697948b75a1c0611a45afd","zarr_source_commit":"a75e73398f38bd161dff9e94d63e3b42d3d84fac","archive_status":null,"archive_size":null,"archive_retry_count":0,"records_status":null,"archive_skip_reason":"dataset 218.5 GB exceeds 100.0 GB archive limit; use direct download","zarr_errors":104,"zarr_failure_count":104,"zarr_deterministic":1,"zarr_failed_at":"2026-09-08 03:35:58","num_dataset_citations":1,"num_datapaper_citations":2,"n_channels":null,"electrode_system":null,"has_hed":0,"hed_version":null,"is_exemplar":0,"bytes_present":234577012848,"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":19921,"recording_duration_min":19,"recording_duration_max":1507,"recording_count":132,"recordings_unavailable":104,"recordings_measured":28,"channel_count_min":319,"channel_count_max":336,"sampling_frequency":null,"power_line_frequency":null,"eeg_reference":null,"placement_scheme":null,"sweep_stamps":"{\"enrichment_updated_at\":\"2026-06-22 11:42:29\",\"metadata_updated_at\":\"2026-06-22 11:42:39\",\"archive_checked_at\":\"2026-06-22 11:43:27\",\"zarr_checked_at\":null,\"records_checked_at\":null,\"citations_updated_at\":\"2026-09-08 03:00:51\",\"channel_montage_checked_at\":null,\"hed_checked_at\":\"2026-06-30 04:46:23\",\"data_checked_at\":\"2026-08-02 03:01:11\",\"availability_report_at\":\"2026-07-23 01:14:53\",\"signal_defaults_at\":\"2026-09-02 12:02:25\"}","participants":28,"num_citations":3,"latest_version":"v1.0.0","zarr_verify_status":null,"zarr_verified_at":null,"owner_username":"nemarAdmin","owner_github":"nemarAdmin","file_size_formatted":"218 GB","zarr_data_failures":{"count":104,"detail_ref":"zarr/index.json","pending":0,"discovered":132},"zarr_index_url":"https://zarr.nemar.org/on003694/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}}