{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,24]],"date-time":"2026-04-24T17:57:33Z","timestamp":1777053453884,"version":"3.51.4"},"reference-count":70,"publisher":"MIT Press","issue":"5","funder":[{"DOI":"10.13039\/501100002790","name":"Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada","doi-asserted-by":"publisher","award":["RGPIN-2019-05132"],"award-info":[{"award-number":["RGPIN-2019-05132"]}],"id":[{"id":"10.13039\/501100002790","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100002790","name":"Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada","doi-asserted-by":"publisher","award":["RGPIN-2018-05770"],"award-info":[{"award-number":["RGPIN-2018-05770"]}],"id":[{"id":"10.13039\/501100002790","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["direct.mit.edu"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2023,5,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Pattern separation, the creation of distinct representations of similar inputs, and statistical learning, the rapid extraction of regularities across multiple inputs, have both been linked to hippocampal processing. It has been proposed that there may be functional differentiation within the hippocampus, such that the trisynaptic pathway (entorhinal cortex &amp;gt; dentate gyrus &amp;gt; CA3 &amp;gt; CA1) supports pattern separation, whereas the monosynaptic pathway (entorhinal cortex &amp;gt; CA1) supports statistical learning. To test this hypothesis, we investigated the behavioral expression of these two processes in B. L., an individual with highly selective bilateral lesions in the dentate gyrus that presumably disrupt the trisynaptic pathway. We tested pattern separation with two novel auditory versions of the continuous mnemonic similarity task, requiring the discrimination of similar environmental sounds and trisyllabic words. For statistical learning, participants were exposed to a continuous speech stream made up of repeating trisyllabic words. They were then tested implicitly through a RT-based task and explicitly through a rating task and a forced-choice recognition task. B. L. showed significant deficits in pattern separation on the mnemonic similarity tasks and on the explicit rating measure of statistical learning. In contrast, B. L. showed intact statistical learning on the implicit measure and the familiarity-based forced-choice recognition measure. Together, these results suggest that dentate gyrus integrity is critical for high-precision discrimination of similar inputs, but not the implicit expression of statistical regularities in behavior. Our findings offer unique new support for the view that pattern separation and statistical learning rely on distinct neural mechanisms.<\/jats:p>","DOI":"10.1162\/jocn_a_01981","type":"journal-article","created":{"date-parts":[[2023,3,6]],"date-time":"2023-03-06T14:11:56Z","timestamp":1678111916000},"page":"900-917","update-policy":"https:\/\/doi.org\/10.1162\/mitpressjournals.corrections.policy","source":"Crossref","is-referenced-by-count":20,"title":["Dentate Gyrus Integrity Is Necessary for Behavioral Pattern Separation But Not Statistical Learning"],"prefix":"10.1162","volume":"35","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1522-0148","authenticated-orcid":true,"given":"Helena Shizhe","family":"Wang","sequence":"first","affiliation":[{"name":"University of Western Ontario, London, Canada"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5328-8675","authenticated-orcid":true,"given":"R. Shayna","family":"Rosenbaum","sequence":"additional","affiliation":[{"name":"York University, Toronto, Ontario, Canada"},{"name":"Rotman Research Institute, Baycrest, Toronto, Ontario, Canada"}]},{"given":"Stevenson","family":"Baker","sequence":"additional","affiliation":[{"name":"York University, Toronto, Ontario, Canada"},{"name":"Rotman Research Institute, Baycrest, Toronto, Ontario, Canada"}]},{"given":"Claire","family":"Lauzon","sequence":"additional","affiliation":[{"name":"York University, Toronto, Ontario, Canada"},{"name":"Rotman Research Institute, Baycrest, Toronto, Ontario, Canada"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6879-4666","authenticated-orcid":true,"given":"Laura J.","family":"Batterink","sequence":"additional","affiliation":[{"name":"University of Western Ontario, London, Canada"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1905-6453","authenticated-orcid":true,"given":"Stefan","family":"K\u00f6hler","sequence":"additional","affiliation":[{"name":"University of Western Ontario, London, Canada"},{"name":"Rotman Research Institute, Baycrest, Toronto, Ontario, Canada"}]}],"member":"281","published-online":{"date-parts":[[2023,5,1]]},"reference":[{"key":"2023040314473847200_","unstructured":"Baker, S.\n           (2022). 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