{"dataset":{"id":"50772","dataset_id":"on002550","name":"Differential brain mechanisms of selection and maintenance of information during working memory (MEG data)","description":"This magnetoencephalography (MEG) dataset investigates the differential neural mechanisms underlying selection and maintenance of information during working memory tasks. Data from 22 participants include MEG recordings across two sessions, structural MRI, and detailed behavioral measures from a working memory task and a one-back control task involving visual Gabor stimuli. The dataset supports investigation of how the brain selectively maintains task-relevant information while filtering distractions.","owner_user_id":15,"status":"active","github_repo":"nemarDatasets/on002550","concept_doi":"10.82901/nemar.on002550","latest_version_doi":"10.82901/nemar.on002550.v1.0.0","created_at":"2026-06-21 05:01:08","updated_at":"2026-07-10 22:10:13","zenodo_concept_id":null,"is_sandbox":0,"visibility":"public","ezid_status":"public","enrichment_json":"{\n  \"version\": \"2.0\",\n  \"pipeline_stage\": \"validated\",\n  \"title\": \"Differential brain mechanisms of selection and maintenance of information during working memory (MEG data)\",\n  \"description\": \"This magnetoencephalography (MEG) dataset investigates the differential neural mechanisms underlying selection and maintenance of information during working memory tasks. Data from 22 participants include MEG recordings across two sessions, structural MRI, and detailed behavioral measures from a working memory task and a one-back control task involving visual Gabor stimuli. The dataset supports investigation of how the brain selectively maintains task-relevant information while filtering distractions.\",\n  \"methods_description\": \"MEG data were acquired across two sessions per participant. Participants performed a working memory task requiring maintenance and comparison of visual Gabor stimuli (varying in spatial frequency and orientation) following directional cues, and a one-back control task. Structural T1 MRI was acquired for anatomical reference. Head position indicator (HPI) coordinates were recorded in surface MRI space using neuronavigation (Brainsight). Behavioral responses and reaction times were recorded synchronously with MEG acquisition using event triggers.\",\n  \"license\": \"CC0\",\n  \"dataset_type\": \"raw\",\n  \"authors\": {\n    \"Romain Quentin\": {},\n    \"Jean-Remi King\": {},\n    \"Etienne Sallard\": {},\n    \"Nathan Fishman\": {},\n    \"Ryan Thompson\": {},\n    \"Ethan Buch\": {},\n    \"Leonardo Cohen\": {}\n  },\n  \"keywords\": [\n    {\n      \"term\": \"MEG\"\n    },\n    {\n      \"term\": \"working memory\"\n    },\n    {\n      \"term\": \"attention\"\n    },\n    {\n      \"term\": \"visual perception\"\n    },\n    {\n      \"term\": \"cognitive neuroscience\"\n    },\n    {\n      \"term\": \"brain imaging\"\n    }\n  ],\n  \"related_identifiers\": [\n    {\n      \"identifier\": \"https://github.com/nemarDatasets/on002550\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": \"https://nemar.org/dataexplorer/detail?dataset_id=on002550\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": \"10.18112/openneuro.ds002550.v1.0.1\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsDerivedFrom\"\n    }\n  ],\n  \"funding_references\": [\n    {\n      \"funder_name\": \"FYSSEN foundation\"\n    },\n    {\n      \"funder_name\": \"Bettencourt Schueller Foundation\"\n    },\n    {\n      \"funder_name\": \"NIH\",\n      \"award_number\": \"NINDS/HCPS\"\n    },\n    {\n      \"funder_name\": \"FYSSEN Foundation\"\n    }\n  ],\n  \"resource_type_specific\": \"MEG Dataset\",\n  \"modalities\": [\n    \"meg\",\n    \"anat\"\n  ],\n  \"sizes\": [\n    \"179.8 GB (6243 files)\"\n  ],\n  \"formats\": [\n    \".1_meg4\",\n    \".2_meg4\",\n    \".DS_Store\",\n    \".acq\",\n    \".bak\",\n    \".cfg\",\n    \".cls\",\n    \".csv\",\n    \".ds/BadChannels\",\n    \".eeg\",\n    \".gitattributes\",\n    \".gz\",\n    \".hc\",\n    \".hist\",\n    \".infods\",\n    \".json\",\n    \".md\",\n    \".meg4\",\n    \".mrk\",\n    \".newds\",\n    \".res4\",\n    \".segments\",\n    \".tsv\",\n    \".txt\",\n    \".yml\"\n  ],\n  \"source_hash\": \"5d4c4fb4ddc62814122222b25d061117e1e16d0bc4a00ee9646de09dd696cb4d\"\n}","last_activity_at":"2026-06-21 05:01:08","source":"openneuro","source_id":"ds002550","subject_count":22,"modalities":"anat,meg","age_min":null,"age_max":null,"file_size":179852342541,"total_files":12755,"tasks":"LocalizerControl,WorkingMemory","metadata_columns_error":null,"staleness_warn_stage":null,"staleness_admin_notified_at":null,"authors":"Romain Quentin, Jean-Remi King, Etienne Sallard, Nathan Fishman, Ryan Thompson, Ethan Buch, Leonardo Cohen","license":"CC0","readme":"[![DOI](https://img.shields.io/badge/DOI-10.82901%2Fnemar.on002550-blue)](https://doi.org/10.82901/nemar.on002550)\n\nOpenNeuro curator note: This dataset was previously accessible at ds001750. The dataset was reuploaded due to privacy considerations. \n\n# Data folder corresponding to [this manuscript](https://www.biorxiv.org/content/early/2018/03/16/283234)\n#### Differential brain mechanisms of selection and maintenance of information during working memory\n\nNote: One participant didn't sign a sharing data agreement so data of 22 participants are available here (vs. 23 in the manuscript). Results and conclusion are not different with only 22 participants.\n\nParticipant folder are organized as:\n- ##### 'ses-mri/anat':\ncontains T1 MRI of the participant\n- ##### ses-01:\ncontains MEG data in BIDS format, behavioral data and HPI position in surface RAS MRI coordinates for session 1\n- ##### ses-02:\ncontains MEG data in BIDS format, behavioral data and HPI position in surface RAS MRI coordinates for session 2\n\n##### Description of non-MEG files:\n- ##### behavioral task scripts:\nMatlab (psychtoolbox 3) script for Working Memory (WorkMem) and one-back control task (LocaCue)\n- ##### hpi_mri_surf.txt:\nContains the X, Y Z coordinates of the nasion, left and right HPI (head position indicator) in surface MRI coordinates. Names of the electrode are NEC (nasion), LEC (left) and REC (right). Others coordinates are for co-registration during the session (not useful here). These HPI coordinates have been acquired from the neuronavigation system brainsight (https://www.rogue-research.com/tms/brainsight-tms/)\n- ##### WorkMem+subNumber+date.csv:\n###### Contains behavioral results:\n- NbTrial: trial number\n- FixNbTrial: trial number with good eye fixation\n- isFixed: whether the participant fixed the central dot during the trial (1:correct fixation, 0:broke fixation)\n- GaborLeft: left gabor (25 possible, 5 spatial frequency* 5 orientations)\n- GaborRight: right gabor (25 possible, 5 spatial frequency* 5 orientations)\n- Cue: cue (4 possible, 1: left dotted, 2: left solid, 3: right dotted, 4: left solid)\n- Change: whether the cued stimulus attribute is different from the corresponding probe attribute (1: different, 0: same)\n- sfLeft: spatial frequency of the left gabor (5 possible)\n- orientLeft: line orientation of the left gabor (5 possible)\n- phaseLeft: phase of the left gabor (5 possible)\n- sfRight: spatial frequency of the right gabor (5 possible)\n- orientRight: line orientation of the right gabor (5 possible)\n- phaseRight: phase of the right gabor (5 possible)\n- randomSF: probe spatial frequency if change=1\n- randomOrient: line orientation if change=1\n- phaseResp: phase of the probe\n- Response: response of the participant (1: different, 0: similar)\n- isCorrect: correctness of the response (1: correct, 0: uncorrect)\n- reactionTime: reaction time from probe onset to participant response\n- TrialTime: total trial duration\n- runningTime: running time\n- fixcrossTime: duration of the fixation dot presentation before stimulus onset (should be between 0.350 and 0.450 s)\n- gaborTime: duration of stimulus presentation (should be 0.1 s)\n- precueTime: duration between stimulus offset and cue onset (should be between 0.75 and 0.85 s)\n- cueTime: duration of the cue presentation (should be 0.1 s)\n- postcueTime: duration between cue offset and probe onset (should be between 1.45 and 1.55 s)\n- feedbackTime: duration of the feedback (green or red dot, should be 0.1 s)\n- triggGabor: trigger sent to MEG acquisition at the stimulus onset\n- triggCue: trigger sent to MEG acquisition at the cue onset\n- triggProbe: trigger sent to MEG acquisition at the probe onset\n- ##### locacue+subNumber+date.csv:\n- NbTrial: trial number\n- FixNbTrial: trial number with good eye fixation\n- isFixed: whether the participant fixed the central dot during the trial (1:correct fixation, 0:broke fixation)\n- same: whether 2 consecutive lines are similar (1: similar, 0: different)\n- Cue: cue (4 possible, 1: left dotted, 2: left solid, 3: right dotted, 4: left solid)\n- Side: side of the cue (1: right, 0: left)\n- Press: whether the participant press the button (1: press, 0: no press)\n- isCorrect: correctness of the response (1: correct, 0: uncorrect)\n- ReactionTime: reaction time when a button is pressed\n- TrialTime: total trial duration\n- runningTime: running time\n- fixcrossTime: duration of the fixation dot\n- cueTime: duration of the cue presentation (should be 0.1 s)\n- postcueTime: duration between the cue offset and the beginning of the next trial (should be 1.2 s)","bids_version":"1.1.1","sessions_count":3,"publish_date":null,"embedding_dirty":0,"license_tier":"public","zarr_status":"ready","zarr_converted_at":"2026-09-06 15:53:11","zarr_store_count":376,"zarr_index_etag":"52072aaa10a6531798fb0eb5088a6498","zarr_source_commit":"b369e513a0945659e66024baa607bb0d68094369","archive_status":null,"archive_size":null,"archive_retry_count":0,"records_status":null,"archive_skip_reason":"dataset 167.5 GB exceeds 100.0 GB archive limit; use direct download","zarr_errors":1,"zarr_failure_count":1,"zarr_deterministic":1,"zarr_failed_at":"2026-09-06 15:53:11","num_dataset_citations":0,"num_datapaper_citations":0,"n_channels":null,"electrode_system":null,"has_hed":0,"hed_version":null,"is_exemplar":0,"bytes_present":179814595039,"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":108838.13200000007,"recording_duration_min":144,"recording_duration_max":712.528,"recording_count":377,"recordings_unavailable":1,"recordings_measured":376,"channel_count_min":304,"channel_count_max":308,"sampling_frequency":null,"power_line_frequency":null,"eeg_reference":null,"placement_scheme":null,"sweep_stamps":"{\"enrichment_updated_at\":\"2026-06-21 05:40:07\",\"metadata_updated_at\":\"2026-06-21 05:40:13\",\"archive_checked_at\":\"2026-06-21 05:38:56\",\"zarr_checked_at\":null,\"records_checked_at\":null,\"citations_updated_at\":null,\"channel_montage_checked_at\":null,\"hed_checked_at\":\"2026-06-30 04:38:05\",\"data_checked_at\":\"2026-07-28 03:00:36\",\"availability_report_at\":\"2026-07-23 01:12:03\",\"signal_defaults_at\":\"2026-09-02 11:55:35\",\"recording_stats_at\":\"2026-09-07 03:00:55\"}","participants":22,"num_citations":0,"latest_version":"v1.0.0","zarr_verify_status":null,"zarr_verified_at":null,"owner_username":"nemarAdmin","owner_github":"nemarAdmin","file_size_formatted":"168 GB","zarr_data_failures":{"count":1,"detail_ref":"zarr/index.json","pending":0,"discovered":377},"zarr_index_url":"https://zarr.nemar.org/on002550/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}}