{"success":true,"database":"eegdash","data":{"_id":"6953f4249276ef1ee07a3345","dataset_id":"ds004388","associated_paper_doi":null,"authors":["Birgit Nierula","Tilman Stephani","Merve Kaptan","André Moruaux","Burkhard Maess","Gabriel Curio","Vadim V. Nikulin","Falk Eippert"],"bids_version":"1.6.0","contact_info":["Falk Eippert"],"contributing_labs":null,"data_processed":false,"dataset_doi":"doi:10.18112/openneuro.ds004388.v1.0.0","datatypes":["eeg"],"demographics":{"subjects_count":40,"ages":[27,33,26,21,30,22,25,24,23,22,21,24,30,26,26,25,28,23,22,20,23,23,31,27,26,22,29,27,26,26,30,19,32,23,30,27,30,31,22,27],"age_min":19,"age_max":33,"age_mean":25.725,"species":null,"sex_distribution":{"f":21,"m":19},"handedness_distribution":null},"experimental_modalities":null,"external_links":{"source_url":"https://openneuro.org/datasets/ds004388","osf_url":null,"github_url":null,"paper_url":null},"funding":["n/a"],"ingestion_fingerprint":"779b8af6f88324a411f88c76a8d59eb23e5dbddc630c102e58b726742ae0506f","license":"CC0","n_contributing_labs":null,"name":"Somatosensory evoked potentials in the human spinal cord to mixed nerve stimulation","readme":"Description\n--------\nThis is a data set consisting of simultaneous electroencephalography (EEG), electrospinography (ESG), electroneurography (ENG), and electromyography (EMG) recordings from 40 participants. There were four different recording conditions: i) resting state with eyes open, ii) mixed median nerve stimulation (arm nerve), iii) mixed tibial nerve stimulation (leg nerve), and iv) alternating mixed median or tibial nerve stimulation. For each participant, there is i) the simultaneous EEG-ESG-ENG-EMG-recording which also includes electrocardiographic and respiratory signals, ii) ESG electrode positions. For a detailed description please see the following article: XXX. This study was pre-registered on OSF: https://osf.io/sgptzt.\nCiting this dataset\n--------\nShould you make use of this data set in any publication, please cite the following article: XXXX\nLicense\n-------\nThis data set is made available under the Creative Commons CC0 license. For more information, see https://creativecommons.org/share-your-work/public-domain/cc0/\nData set\n-------\nThis data set is organized according to the Brain Imaging Data Structure specification. For more information on this data specification, see https://bids-specification.readthedocs.io/en/stable/\nEach participant's data are in one subdirectory (e.g., 'sub-001'), which contains the raw data in eeglab format.\nPlease note that the EEG channel Fz was referenced to i) the EEG reference (right mastoid, RM, channel name: Fz) and ii) the ESG reference (6th thoracic vertebra, TH6, channel name: Fz-TH6).\nShould you have any questions about this data set, please contact nierula@cbs.mpg.de or eippert@cbs.mpg.de.","recording_modality":["eeg"],"senior_author":"Falk Eippert","sessions":[],"size_bytes":732876216370,"source":"openneuro","study_design":null,"study_domain":null,"tasks":["alternating","median","tibial"],"timestamps":{"digested_at":"2026-04-22T12:26:31.695445+00:00","dataset_created_at":"2023-01-04T13:11:50.245Z","dataset_modified_at":"2023-07-06T19:24:02.000Z"},"total_files":399,"storage":{"backend":"s3","base":"s3://openneuro.org/ds004388","raw_key":"dataset_description.json","dep_keys":["CHANGES","README","participants.json","participants.tsv"]},"tagger_meta":{"config_hash":"4a051be509a0e3d0","metadata_hash":"cded082cd261f847","model":"openai/gpt-5.2","tagged_at":"2026-01-20T10:37:55.480947+00:00"},"tags":{"pathology":["Healthy"],"modality":["Tactile"],"type":["Perception"],"confidence":{"pathology":0.7,"modality":0.8,"type":0.7},"reasoning":{"few_shot_analysis":"Most similar few-shot conventions:\n- The intraoperative SEP dataset (\"Intraoperative EEG dataset during medianus-tibialis stimulation\") shows that median/tibial nerve stimulation is treated as somatosensory/SEP-like data; that example used Pathology=Surgery because it was explicitly intraoperative, but here there is no surgery/clinical recruitment mentioned.\n- The Braille tactile dataset demonstrates that somatosensory input maps to Modality=Tactile when stimuli are delivered to the body (Braille under fingers). Our dataset likewise delivers peripheral nerve stimulation (median/tibial), which is best aligned with Tactile rather than Visual/Auditory.\nThese examples guide the mapping of peripheral nerve stimulation to Tactile modality, while Pathology must follow explicit recruitment facts (none are stated here).","metadata_analysis":"Key metadata facts (quoted):\n1) Population/recruitment: \"simultaneous ... recordings from 40 participants\" (no diagnosis or patient group specified).\n2) Conditions/stimuli: \"There were four different recording conditions: i) resting state with eyes open, ii) mixed median nerve stimulation (arm nerve), iii) mixed tibial nerve stimulation (leg nerve), and iv) alternating mixed median or tibial nerve stimulation.\"\n3) Additional context: \"This is a data set consisting of simultaneous electroencephalography (EEG), electrospinography (ESG), electroneurography (ENG), and electromyography (EMG) recordings\" and it includes \"electrocardiographic and respiratory signals.\"","paper_abstract_analysis":"No useful paper information.","evidence_alignment_check":"Pathology:\n- Metadata says: only \"40 participants\" with no clinical descriptors; no mention of patients/diagnosis.\n- Few-shot pattern suggests: when a clinical context is explicit (e.g., intraoperative) label can be Surgery; when no disorder is stated, label as Healthy.\n- Alignment: ALIGN (metadata has no pathology; few-shot convention supports Healthy for normative cohorts).\n\nModality:\n- Metadata says: \"mixed median nerve stimulation\" and \"mixed tibial nerve stimulation\" (peripheral somatosensory stimulation).\n- Few-shot pattern suggests: peripheral/somatosensory stimulation aligns with Tactile (and SEP-like setups); Braille example maps body-delivered stimuli to Tactile.\n- Alignment: ALIGN.\n\nType:\n- Metadata says: stimulation conditions plus \"resting state with eyes open\"; no explicit cognitive construct named, but nerve stimulation implies somatosensory evoked responses.\n- Few-shot pattern suggests: sensory stimulation paradigms are typically Perception (unless the main goal is clinical/intervention or pure resting-state).\n- Alignment: Mostly ALIGN; minor ambiguity because resting-state is also included, but the dataset prominently includes stimulation conditions.","decision_summary":"Top-2 candidates and selection:\n\nPathology:\n1) Healthy — Evidence: \"40 participants\" with no diagnosis/patient labels anywhere; conforms to convention that absence of clinical recruitment implies Healthy.\n2) Unknown — Competing because the metadata never explicitly says \"healthy\".\nDecision: Healthy (stronger because dataset description is neutral/experimental rather than clinical and contains no patient-group terminology).\nConfidence evidence: 1 explicit population quote + absence of any pathology terms.\n\nModality:\n1) Tactile — Evidence: \"mixed median nerve stimulation\" and \"mixed tibial nerve stimulation\" (somatosensory peripheral stimulation).\n2) Resting State — Competing because one condition is \"resting state with eyes open\".\nDecision: Tactile (dominant experimental manipulation is nerve stimulation across multiple conditions).\nConfidence evidence: 2 explicit stimulation-condition quotes.\n\nType:\n1) Perception — Evidence: peripheral nerve stimulation is used to probe somatosensory processing/evoked responses; multiple stimulation conditions listed.\n2) Resting-state — Competing because one recording condition is resting eyes-open.\nDecision: Perception (dataset is primarily structured around stimulation paradigms, with resting as an additional condition).\nConfidence evidence: 1 explicit stimulation-condition quote + contextual inference that SEP/nerve stimulation targets sensory processing."}},"nemar_citation_count":3,"computed_title":"Somatosensory evoked potentials in the human spinal cord to mixed nerve stimulation","nchans_counts":[{"val":115,"count":319},{"val":114,"count":80}],"sfreq_counts":[{"val":10000.0,"count":399}],"stats_computed_at":"2026-04-22T23:16:00.307544+00:00","total_duration_s":156563.6517,"author_year":"Nierula2023_Somatosensory","canonical_name":null}}