{"success":true,"database":"eegdash","data":{"_id":"6953f4249276ef1ee07a3346","dataset_id":"ds004389","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.ds004389.v1.0.0","datatypes":["eeg"],"demographics":{"subjects_count":26,"ages":[21,19,19,31,23,26,21,21,35,26,24,20,20,26,19,21,27,20,25,19,31,27,27,28,29,22],"age_min":19,"age_max":35,"age_mean":24.115384615384617,"species":null,"sex_distribution":{"f":14,"m":12},"handedness_distribution":null},"experimental_modalities":null,"external_links":{"source_url":"https://openneuro.org/datasets/ds004389","osf_url":null,"github_url":null,"paper_url":null},"funding":["n/a"],"ingestion_fingerprint":"453dc168c1e7bd8fa9fffca7c688a91c3bfafed930d7e55fca6a852fd92fe55f","license":"CC0","n_contributing_labs":null,"name":"Somatosensory evoked potentials in the human spinal cord to mixed and sensory nerve stimulation","readme":"Description\n--------\nThis is a data set consisting of simultaneous electroencephalography (EEG), electrospinography (ESG), electroneurography (ENG), and electromyography (EMG) recordings from 26 participants. There were nine different recording conditions: i) resting state with eyes open, ii) mixed median nerve stimulation (arm nerve), iii) mixed tibial nerve stimulation (leg nerve), iv) sensory nerve stimulation of the index finger, v) sensory nerve stimulation of the middle finger, vi) simultaneous senory nerve stimulation of the index and middle finger, vii) sensory nerve stimulation to the first toe, viii) sensory nerve stimulation to the second toe, ix) simultaneous senory nerve stimulation to the first and second toe. 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/mjdha.\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":404264478546,"source":"openneuro","study_design":null,"study_domain":null,"tasks":["medianmixed","mediansensory","tibialmixed","tibialsensory"],"timestamps":{"digested_at":"2026-04-22T12:26:33.782458+00:00","dataset_created_at":"2023-01-04T13:15:45.996Z","dataset_modified_at":"2023-07-06T19:26:09.000Z"},"total_files":260,"storage":{"backend":"s3","base":"s3://openneuro.org/ds004389","raw_key":"dataset_description.json","dep_keys":["CHANGES","README","participants.json","participants.tsv"]},"tagger_meta":{"config_hash":"4a051be509a0e3d0","metadata_hash":"73bb59d30bda2da8","model":"openai/gpt-5.2","tagged_at":"2026-01-20T10:38:26.633088+00:00"},"tags":{"pathology":["Healthy"],"modality":["Tactile"],"type":["Perception"],"confidence":{"pathology":0.6,"modality":0.8,"type":0.7},"reasoning":{"few_shot_analysis":"Most similar few-shot conventions: (1) 'Braille letters - EEG' maps finger-based somatosensory input to Modality='Tactile' (stimuli on fingers), guiding a Tactile modality choice here because the dataset uses peripheral nerve/finger/toe stimulation. (2) 'Intraoperative EEG dataset during medianus-tibialis stimulation...' shows that medianus/tibialis stimulation can be treated as SEP/somatosensory stimulation; although that example uses Modality='Other' and Pathology='Surgery' due to the intraoperative context, it supports interpreting median/tibial nerve stimulation as a sensory (somatosensory) paradigm rather than motor or visual/auditory. No few-shot example suggests a non-Healthy pathology when only generic 'participants' are mentioned.","metadata_analysis":"Key task/stimulus facts from the README: (1) Population is described only as \"26 participants\" with no diagnosis or patient recruitment stated: \"recordings from 26 participants.\" (2) Multiple explicit somatosensory stimulation conditions: \"mixed median nerve stimulation (arm nerve)\", \"mixed tibial nerve stimulation (leg nerve)\", and \"sensory nerve stimulation of the index finger\" / \"middle finger\" / \"first toe\" / \"second toe\". (3) A resting condition exists but is only one of nine: \"There were nine different recording conditions: i) resting state with eyes open, ii) mixed median nerve stimulation ...\" indicating the dominant paradigm is evoked sensory stimulation rather than pure resting-state.","paper_abstract_analysis":"No useful paper information.","evidence_alignment_check":"Pathology: Metadata SAYS only \"26 participants\" and provides no clinical recruitment/diagnosis terms; few-shot pattern SUGGESTS labeling as Healthy when no disorder population is specified; ALIGN (no conflict). Modality: Metadata SAYS repeated \"nerve stimulation\" and \"sensory nerve stimulation\" of fingers/toes plus median/tibial nerve; few-shot pattern SUGGESTS 'Tactile' for finger-based somatosensory stimuli (e.g., Braille example) and SEP-like stimulation as somatosensory input; ALIGN (choose Tactile rather than Other because it is peripheral somatosensory stimulation). Type: Metadata SAYS the paradigm is sensory nerve stimulation across conditions (with one eyes-open rest condition); few-shot pattern SUGGESTS that sensory stimulation/detection/discrimination paradigms map to Perception, whereas purely methodological/recording-context paradigms sometimes map to Other; PARTIAL ALIGN (both plausible, but Perception fits better given explicit 'sensory nerve stimulation' as the experimental manipulation).","decision_summary":"Top-2 Pathology candidates: (A) Healthy — supported by absence of any diagnosis language and generic recruitment phrasing: \"26 participants\"; (B) Unknown — possible because health status is not explicitly stated. Winner: Healthy (no evidence of a clinical cohort). Top-2 Modality candidates: (A) Tactile — supported by \"sensory nerve stimulation of the index finger\" and toe/finger stim conditions, plus median/tibial nerve stimulation implying somatosensory input; (B) Other — possible because stimulation is electrical (not explicitly 'touch'), but still targets somatosensory pathways. Winner: Tactile. Top-2 Type candidates: (A) Perception — primary manipulation is somatosensory stimulation (SEPs/sensory processing), e.g., \"sensory nerve stimulation...\"; (B) Resting-state — present as \"resting state with eyes open\" but only 1/9 conditions. Winner: Perception. Confidence: Pathology 0.6 because no explicit 'healthy' quote (only lack of pathology); Modality 0.8 because multiple explicit stimulation quotes (finger/toe/median/tibial); Type 0.7 because task purpose is inferred from stimulation paradigm rather than explicitly stated as perception/SEPs."}},"nemar_citation_count":2,"computed_title":"Somatosensory evoked potentials in the human spinal cord to mixed and sensory nerve stimulation","nchans_counts":[{"val":90,"count":260}],"sfreq_counts":[{"val":10000.0,"count":260}],"stats_computed_at":"2026-04-22T23:16:00.307556+00:00","total_duration_s":110361.3895,"author_year":"Nierula2023_Somatosensory_evoked","canonical_name":null}}