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Three major conclusions from recent work are that\n (\n                    <jats:italic>i<\/jats:italic>\n                    ) the capacity for nondeclarative (nonconscious)\n learning can now be studied in a broad array of tasks that assess\n classification learning, perceptuomotor skill learning, artificial\n grammar learning, and prototype abstraction; (\n                    <jats:italic>ii<\/jats:italic>\n                    )\n cortical areas adjacent to the hippocampal formation, including\n entorhinal, perirhinal, and parahippocampal cortices, are an essential\n part of the medial temporal lobe memory system that supports\n declarative (conscious) memory; and (\n                    <jats:italic>iii<\/jats:italic>\n                    ) in humans,\n bilateral damage limited to the hippocampal formation is nevertheless\n sufficient to produce severe anterograde amnesia and temporally graded\n retrograde amnesia covering as much as 25 years.\n                  <\/jats:p>","DOI":"10.1073\/pnas.93.24.13515","type":"journal-article","created":{"date-parts":[[2002,7,26]],"date-time":"2002-07-26T10:34:16Z","timestamp":1027679656000},"page":"13515-13522","update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":974,"title":["Structure and function of declarative and nondeclarative memory\u2009systems"],"prefix":"10.1073","volume":"93","author":[{"given":"Larry\u2009R.","family":"Squire","sequence":"first","affiliation":[{"name":"Veterans Affairs Medical Center, and Departments of Psychiatry and\r Neurosciences, University of California, San Diego, La Jolla, CA 92161"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stuart\u2009M.","family":"Zola","sequence":"additional","affiliation":[{"name":"Veterans Affairs Medical Center, and Departments of Psychiatry and\r Neurosciences, University of California, San Diego, La Jolla, CA 92161"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"341","published-online":{"date-parts":[[1996,11,26]]},"reference":[{"key":"e_1_3_2_1_2","doi-asserted-by":"publisher","DOI":"10.1101\/lm.1.2.106"},{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.273.5280.1399"},{"key":"e_1_3_2_3_2","unstructured":"Knowlton B.\u2009J. 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