{"dataset":{"id":"392","dataset_id":"nm000155","name":"MUniverse Caillet et al 2023","description":"BIDS-EMG dataset - HDsEMG recordings of tibialis anterior during isometric contractions at 30% and 50% MVC, 6 subjects, 256-channel grids (MUniverse benchmark)","owner_user_id":19,"status":"active","github_repo":"nemarDatasets/nm000155","concept_doi":"10.82901/nemar.nm000155","latest_version_doi":"10.82901/nemar.nm000155.v1.0.1","created_at":"2026-04-08 06:35:04","updated_at":"2026-07-10 21:49:14","zenodo_concept_id":"20493505","is_sandbox":0,"visibility":"public","ezid_status":"public","enrichment_json":"{\n  \"version\": \"2.0\",\n  \"pipeline_stage\": \"validated\",\n  \"authors\": {\n    \"Arnault H. Caillet\": {},\n    \"Simon Avrillon\": {\n      \"orcid\": \"0000-0002-2226-3528\"\n    },\n    \"Aritra Kundu\": {},\n    \"Tianyi Yu\": {},\n    \"Andrew T. M. Phillips\": {},\n    \"Luca Modenese\": {\n      \"orcid\": \"0000-0003-1402-5359\"\n    },\n    \"Dario Farina\": {\n      \"orcid\": \"0000-0002-7883-2697\"\n    }\n  },\n  \"related_identifiers\": [\n    {\n      \"identifier\": \"10.6084/m9.figshare.22149287\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsDerivedFrom\"\n    },\n    {\n      \"identifier\": \"10.1523/ENEURO.0064-23.2023\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"References\"\n    },\n    {\n      \"identifier\": \"https://github.com/nemarDatasets/nm000155\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": \"https://nemar.org/dataexplorer/detail?dataset_id=nm000155\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": \"10.7910/DVN/F9GWIW\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsVersionOf\"\n    }\n  ],\n  \"funding_references\": [\n    {\n      \"funder_name\": \"Engineering and Physical Sciences Research Council (EPSRC) Transformative Healthcare\"\n    },\n    {\n      \"funder_name\": \"European Research Council\",\n      \"award_number\": \"810346\",\n      \"award_title\": \"NaturalBionicS Synergy Grant\"\n    },\n    {\n      \"funder_name\": \"Engineering and Physical Sciences Research Council\",\n      \"award_number\": \"EP/T020970\",\n      \"award_title\": \"Non-Invasive Single Neuron Electrical Monitoring (NISNEM Technology) Grant\"\n    },\n    {\n      \"funder_name\": \"Biotechnology and Biological Sciences Research Council\",\n      \"award_number\": \"NU-003743\",\n      \"award_title\": \"Neural Commands for Fast Movements in the Primate Motor System\"\n    }\n  ],\n  \"title\": \"MUniverse Caillet et al 2023\",\n  \"license\": \"CC0 BY 4.0\",\n  \"dataset_type\": \"raw\",\n  \"resource_type_general\": \"Dataset\",\n  \"modalities\": [\n    \"emg\"\n  ],\n  \"resource_type_specific\": \"EMG Dataset\",\n  \"sizes\": [\n    \"469.7 MB (12 files)\"\n  ],\n  \"formats\": [\n    \".edf\",\n    \".json\",\n    \".md\",\n    \".tsv\",\n    \".yml\"\n  ],\n  \"description\": \"High-density surface electromyography (HDsEMG) recordings from six healthy male subjects performing isometric contractions of the tibialis anterior muscle at 30% and 50% maximum voluntary contraction. The dataset comprises 256-channel electrode grids positioned on the muscle belly with synchronized force measurements, designed to investigate optimal electrode configurations for motor unit identification and representation in surface EMG recordings.\",\n  \"methods_description\": \"Participants performed trapezoidal isometric contractions at 30% and 50% MVC with linear ramps at 5% per second and plateaus of 20s and 15s respectively, separated by 120s rest. HDsEMG was recorded using four 64-channel grids (4mm inter-electrode distance) positioned on the right tibialis anterior muscle. Skin preparation included shaving, abrasion, and alcohol cleansing. Force was simultaneously recorded using a load cell connected to a commercial dynamometer. Reference and ground electrodes were positioned around the ankle.\",\n  \"keywords\": [\n    {\n      \"term\": \"Electromyography\",\n      \"subject_scheme\": \"MeSH\",\n      \"value_uri\": \"http://id.nlm.nih.gov/mesh/D004576\"\n    },\n    {\n      \"term\": \"motor units\"\n    },\n    {\n      \"term\": \"Muscle Contraction\",\n      \"subject_scheme\": \"MeSH\",\n      \"value_uri\": \"http://id.nlm.nih.gov/mesh/D009119\"\n    },\n    {\n      \"term\": \"tibialis anterior\"\n    },\n    {\n      \"term\": \"high-density surface EMG\"\n    },\n    {\n      \"term\": \"electrode arrays\"\n    }\n  ],\n  \"source_hash\": \"233c14588379c88c493a13e6d44e35da29d310c89c1b10ad1510e758088b65c5\"\n}","last_activity_at":"2026-04-08 06:35:19","source":null,"source_id":null,"subject_count":6,"modalities":"emg","age_min":null,"age_max":null,"file_size":469687288,"total_files":12,"tasks":"isometric30percentmvc,isometric50percentmvc","metadata_columns_error":null,"staleness_warn_stage":null,"staleness_admin_notified_at":null,"authors":"Arnault H. Caillet, Simon Avrillon, Aritra Kundu, Tianyi Yu, Andrew T. M. Phillips, Luca Modenese, Dario Farina","license":"CC0 BY 4.0","readme":"[![DOI](https://img.shields.io/badge/DOI-10.82901%2Fnemar.nm000155-blue)](https://doi.org/10.82901/nemar.nm000155)\n\n\n# Caillet et al 2023: HDsEMG recordings\n\nBIDS-formatted version of the HDsEMG dataset published in *[Caillet et al. 2023](https://doi.org/10.1523/ENEURO.0064-23.2023)*. \n\n### Population\nSix healthy male subjects (age: 26 +/- 4 years; height: 174 +/- 7 cm; weight: 66 +/- 15 kg).\n\n### Protocol description\nEach participant performed two trapezoidal contractions at 30 percent and 50 percent MVC, \nwith 120 s of rest in between, consisting of linear ramps up and down performed at \n5 percent per second and a plateau maintained for 20 and 15 s at 30 percent and \n50 percent MVC, respectively. The order of the contractions was randomized.\n\n### Electrode placement\nFirst, the skin was shaved, abrased and cleansed with 70 percent ethyl alcohol.\nNext, four grids (64 channels) were carefully positioned side-to-side with a 4-mm distance between the \nelectrodes at the edges of adjacent grids. The 256 electrodes were centered on the \nmuscle belly (right tibialis anterior) and laid within the muscle perimeter identified \nthrough palpation. Two bands damped with water were placed around the ankle as \nground (R2) and reference (R1) electrodes. \n\n### Set-up description\nThe participant sat on a massage table with the hips flexed at 30 degrees, 0 degrees being \nthe hip neutral position, and their knees fully extended. We fixed the foot of \nthe dominant leg (right in all participants) onto the pedal of a commercial dynamometer (OT Bioelettronica) \npositioned at 30 degrees in the plantarflexion direction, 0 degrees being the foot \nperpendicular to the shank. The thigh was fixed to the massage table with an \ninextensible 3-cm-wide Velcro strap. The foot was fixed to the pedal with inextensible \nstraps positioned around the proximal phalanx, metatarsal, and cuneiform. Force signals \nwere recorded with a load cell (CCT Transducer s.a.s.) connected in-series to the pedal \nusing the same acquisition system as for the HD-EMG recordings. The dynamometer was \npositioned according to the participant's lower limb length and secured to the massage table \nto avoid any motion during the contractions. \n\n### Missing data\nThere is no 50 % MVC ramp-and-hold contraction for the second subject.\n\n### Coordinate systems\nAll electrode coordinates (reported in mm) have been converted to a common reference \nframe corresponding to the first EMG-array (*space-grid1*). \nThe positions of the reference and ground electrodes are reported in a separate \ncoordinate system (*space-lowerLeg*) reported as a percentage of the lower leg length. \n\n### Conversion\nThe dataset has been converted semi-automatically using the [*MUniverse*](https://github.com/dfarinagroup/muniverse/tree/main) software.\nSee *dataset_description.json* for further details.","bids_version":"1.11.1","sessions_count":0,"publish_date":"2026-06-01 15:53:20","embedding_dirty":0,"license_tier":"public","zarr_status":"ready","zarr_converted_at":"2026-09-04 07:52:26","zarr_store_count":11,"zarr_index_etag":"8d2e91e821bbd5e687d71b6107fd990c","zarr_source_commit":"d792b3f8f55e68e5b080ca8cc7e3ef9e85724b59","archive_status":"ready","archive_size":194421363,"archive_retry_count":0,"records_status":null,"archive_skip_reason":null,"zarr_errors":0,"zarr_failure_count":0,"zarr_deterministic":0,"zarr_failed_at":null,"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":null,"data_complete":null,"withdrawn_at":null,"withdrawn_reason":null,"archive_complete":null,"archive_absent_files":null,"archive_declared_files":null,"zarr_pool_breaks":0,"total_recording_duration":442,"recording_duration_min":38,"recording_duration_max":43,"recording_count":11,"recordings_unavailable":0,"recordings_measured":11,"channel_count_min":259,"channel_count_max":259,"sampling_frequency":null,"power_line_frequency":null,"eeg_reference":null,"placement_scheme":null,"sweep_stamps":"{\"enrichment_updated_at\":\"2026-06-01 15:53:38\",\"metadata_updated_at\":\"2026-06-01 15:55:17\",\"archive_checked_at\":\"2026-06-05 01:32:53\",\"zarr_checked_at\":\"2026-06-07 17:58:23\",\"records_checked_at\":null,\"citations_updated_at\":null,\"channel_montage_checked_at\":null,\"hed_checked_at\":\"2026-06-30 04:13:03\",\"data_checked_at\":null,\"availability_report_at\":\"2026-07-23 01:06:06\",\"signal_defaults_at\":\"2026-09-02 11:39:42\",\"recording_stats_at\":\"2026-09-05 03:00:43\",\"zarr_verify_attempted_at\":\"2026-09-08 03:02:09\",\"zarr_verified_at\":\"2026-09-08 03:02:09\",\"zarr_verified_commit\":\"d792b3f8f55e68e5b080ca8cc7e3ef9e85724b59\",\"zarr_verify_status\":\"verified\",\"zarr_verify_examples\":[],\"zarr_verify_sampled\":11.0,\"zarr_verify_checked\":11.0,\"zarr_verify_checked_channels\":11.0,\"zarr_verify_checked_duration\":11.0,\"zarr_verify_checked_rate\":11.0,\"zarr_verify_unchecked\":0.0,\"zarr_verify_mismatch_count\":0.0,\"zarr_verify_examples_truncated\":0.0}","participants":6,"num_citations":0,"latest_version":"v1.0.1","zarr_verify_status":"verified","zarr_verified_at":"2026-09-08 03:02:09","owner_username":"bruaristimunha","owner_github":"bruAristimunha","file_size_formatted":"448 MB","zarr_data_failures":null,"zarr_index_url":"https://zarr.nemar.org/nm000155/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}}