{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,8]],"date-time":"2026-05-08T17:20:00Z","timestamp":1778260800404,"version":"3.51.4"},"reference-count":63,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2025,11,24]],"date-time":"2025-11-24T00:00:00Z","timestamp":1763942400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000780","name":"European Union\u2019s Horizon 2020 Research and Innovation Programme","doi-asserted-by":"publisher","award":["945307"],"award-info":[{"award-number":["945307"]}],"id":[{"id":"10.13039\/501100000780","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Rapid global urbanization has intensified the demand for sensing solutions that can capture the complex interactions between urban environments and their impact on human physical and mental health. Conventional laboratory-based approaches, while offering high experimental control, often lack ecological validity and fail to represent real-world exposures. To address this gap, we present the eMOTIONAL Cities Walker\u2014a portable multimodal sensing platform designed as a wearable backpack unit developed for the synchronous collecting of multimodal data in either indoor or outdoor settings. The system integrates a suite of environmental sensors (covering microclimate, air pollution and acoustic monitoring) with physiological sensing technologies, including electroencephalography (EEG), mobile eye-tracking and wrist-based physiological monitoring. This configuration enables real-time acquisition of environmental and physiological signals in dynamic, naturalistic settings. Here, we describe the system\u2019s technical architecture, sensor specifications, and field deployment across selected Lisbon locations, demonstrating its feasibility and robustness in urban environments. By bridging controlled laboratory paradigms with ecologically valid real-world sensing, this platform provides a novel tool to advance translational research at the intersection of sensor technology, human experience, and urban health.<\/jats:p>","DOI":"10.3390\/s25237163","type":"journal-article","created":{"date-parts":[[2025,11,24]],"date-time":"2025-11-24T14:59:04Z","timestamp":1763996344000},"page":"7163","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Advancing Mobile Neuroscience: A Novel Wearable Backpack for Multi-Sensor Research in Urban Environments"],"prefix":"10.3390","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-8911-4288","authenticated-orcid":false,"given":"Jo\u00e3o","family":"Amaro","sequence":"first","affiliation":[{"name":"Institute of Physiology, Lisbon School of Medicine, University of Lisbon, 1649-028 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-0116-8656","authenticated-orcid":false,"given":"Rafael","family":"Ramusga","sequence":"additional","affiliation":[{"name":"Associate Laboratory TERRA, Centre of Geographical Studies, Institute of Geography and Spatial Planning, University of Lisbon, 1649-004 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1704-147X","authenticated-orcid":false,"given":"Ana","family":"Bonif\u00e1cio","sequence":"additional","affiliation":[{"name":"Institute of Physiology, Lisbon School of Medicine, University of Lisbon, 1649-028 Lisbon, Portugal"},{"name":"Associate Laboratory TERRA, Centre of Geographical Studies, Institute of Geography and Spatial Planning, University of Lisbon, 1649-004 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-7480-0720","authenticated-orcid":false,"given":"Andr\u00e9","family":"Almeida","sequence":"additional","affiliation":[{"name":"NeuroGEARS Ltd., London NW1 7EA, UK"}]},{"given":"Jo\u00e3o","family":"Fraz\u00e3o","sequence":"additional","affiliation":[{"name":"NeuroGEARS Portugal Lda, 1600-514 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9361-6378","authenticated-orcid":false,"given":"Bruno F.","family":"Cruz","sequence":"additional","affiliation":[{"name":"NeuroGEARS Ltd., London NW1 7EA, UK"}]},{"given":"Andrew","family":"Erskine","sequence":"additional","affiliation":[{"name":"NeuroGEARS Ltd., London NW1 7EA, UK"}]},{"given":"Filipe","family":"Carvalho","sequence":"additional","affiliation":[{"name":"NeuroGEARS Portugal Lda, 1600-514 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0731-4945","authenticated-orcid":false,"given":"Gon\u00e7alo","family":"Lopes","sequence":"additional","affiliation":[{"name":"NeuroGEARS Ltd., London NW1 7EA, UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2543-6893","authenticated-orcid":false,"given":"Ata","family":"Chokhachian","sequence":"additional","affiliation":[{"name":"Climateflux GmbH, 80337 Munich, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9120-011X","authenticated-orcid":false,"given":"Daniele","family":"Santucci","sequence":"additional","affiliation":[{"name":"Climateflux GmbH, 80337 Munich, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3220-4943","authenticated-orcid":false,"given":"Paulo","family":"Morgado","sequence":"additional","affiliation":[{"name":"Associate Laboratory TERRA, Centre of Geographical Studies, Institute of Geography and Spatial Planning, University of Lisbon, 1649-004 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4660-6051","authenticated-orcid":false,"given":"Bruno","family":"Miranda","sequence":"additional","affiliation":[{"name":"Institute of Physiology, Lisbon School of Medicine, University of Lisbon, 1649-028 Lisbon, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2025,11,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Leeuw, E., and Simos, J. 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