{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T17:36:11Z","timestamp":1791912971623,"version":"4.3.4"},"reference-count":97,"publisher":"MIT Press","license":[{"start":{"date-parts":[[2026,3,30]],"date-time":"2026-03-30T00:00:00Z","timestamp":1774828800000},"content-version":"vor","delay-in-days":88,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"European Structure and Investment Fund","award":["ZS\/2020\/05\/141591"],"award-info":[{"award-number":["ZS\/2020\/05\/141591"]}]},{"name":"European Research Council under the European Union\u2019s\n                                Horizon 2020 research and innovation programme","award":["949609"],"award-info":[{"award-number":["949609"]}]},{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["MA, 9235\/3-1, 501214112"],"award-info":[{"award-number":["MA, 9235\/3-1, 501214112"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["KU 3711\/4-1, 528318902"],"award-info":[{"award-number":["KU 3711\/4-1, 528318902"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["direct.mit.edu"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2026,5,26]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Tactile fingertip sensations are critical for everyday life. Accordingly, tactile fingertip maps have been extensively studied in human primary somatosensory cortex. However, the fine-grained functional architecture of these maps remains largely unknown. To uncover this architecture, we sought to estimate 2D spatio-tactile population receptive fields (pRFs) of the tip of the index finger in human Brodmann area 3b (BA3b). Using functional magnetic resonance imaging at 7T and submillimeter resolution along with prospective motion correction, we recorded brain responses while participants sensed a row of vibrotactile pins sweeping along cardinal axes over a portion of the fingertip. To estimate pRF position and size, we initially fit a 2D Gaussian pRF model to the data, which, however, produced largely implausible pRF estimates. Simulations indicated that this likely occurred because the size of pRFs in BA3b surpasses the portion of the fingertip we stimulated, resulting in an incomplete mapping of pRFs. To address this issue, we constrained the fitting procedure and refined the 2D Gaussian pRF model by keeping pRF size constant. Our results for pRF position then revealed that the ulnar-to-radial axis spanning the fingertip maps onto a superior-to-inferior axis in BA3b. Both the putatively large pRF size (relative to the mapping area) and the pRF position gradient we uncover here appear compatible with receptive field properties quantified in monkeys. Our study provides the first comprehensive investigation into the fine-grained functional architecture of human fingertip maps and brings us one step closer to a thorough understanding thereof.<\/jats:p>","DOI":"10.1162\/imag.a.1210","type":"journal-article","created":{"date-parts":[[2026,3,30]],"date-time":"2026-03-30T20:02:00Z","timestamp":1774900920000},"update-policy":"https:\/\/doi.org\/10.1162\/mitpressjournals.corrections.policy","source":"Crossref","is-referenced-by-count":5,"title":["Modeling 2D spatio-tactile population receptive fields of the\n                    fingertip in human primary somatosensory cortex"],"prefix":"10.1162","volume":"4","author":[{"given":"Susanne","family":"Stoll","sequence":"first","affiliation":[{"name":"Hertie Institute for Clinical Brain Research, Tuebingen, Germany"},{"name":"Institute for Cognitive Neurology and Dementia Research, Otto-von-Guericke University Magdeburg, Germany"},{"name":"German Center for Neurodegenerative Diseases, Magdeburg, Germany"},{"name":"Max Planck Institute for Biological Cybernetics, Tuebingen, Germany"},{"name":"German Center for Neurodegenerative Diseases, Tuebingen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Falk","family":"Luesebrink","sequence":"additional","affiliation":[{"name":"German Center for Neurodegenerative Diseases, Magdeburg, Germany"},{"name":"Biomedical Magnetic Resonance, Otto-von-Guericke-University Magdeburg, Germany"},{"name":"Nuclear Magnetic Resonance Methods & Development Group, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"D. Samuel","family":"Schwarzkopf","sequence":"additional","affiliation":[{"name":"School of Optometry and Vision Science, The University of Auckland, New Zealand"},{"name":"Experimental Psychology, University College London, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hendrik","family":"Mattern","sequence":"additional","affiliation":[{"name":"German Center for Neurodegenerative Diseases, Magdeburg, Germany"},{"name":"Biomedical Magnetic Resonance, Otto-von-Guericke-University Magdeburg, Germany"},{"name":"Center for Behavioral Brain Sciences, Magdeburg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peng","family":"Liu","sequence":"additional","affiliation":[{"name":"Hertie Institute for Clinical Brain Research, Tuebingen, Germany"},{"name":"Institute for Cognitive Neurology and Dementia Research, Otto-von-Guericke University Magdeburg, Germany"},{"name":"German Center for Neurodegenerative Diseases, Magdeburg, Germany"},{"name":"German Center for Neurodegenerative Diseases, Tuebingen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Johanna","family":"Noelle","sequence":"additional","affiliation":[{"name":"Institute for Cognitive Neurology and Dementia Research, Otto-von-Guericke University Magdeburg, Germany"},{"name":"German Center for Neurodegenerative Diseases, Magdeburg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Esther","family":"Kuehn","sequence":"additional","affiliation":[{"name":"Hertie Institute for Clinical Brain Research, Tuebingen, Germany"},{"name":"Institute for Cognitive Neurology and Dementia Research, Otto-von-Guericke University Magdeburg, Germany"},{"name":"German Center for Neurodegenerative Diseases, Magdeburg, Germany"},{"name":"German Center for Neurodegenerative Diseases, Tuebingen, Germany"},{"name":"Center for Behavioral Brain Sciences, Magdeburg, 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