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Despite patients primarily complaining of language difficulties, emerging evidence points to performance deficits in non-linguistic domains. Temporoparietal cortex, and functional brain networks anchored to this region, are implicated as putative neural substrates of non-linguistic cognitive deficits in logopenic variant primary progressive aphasia, suggesting that degeneration of a shared set of brain regions may result in co-occurring linguistic and non-linguistic dysfunction early in the disease course. Here, we provide a Review aimed at broadening the understanding of logopenic variant primary progressive aphasia beyond the lens of an exclusive language disorder. By considering behavioural and neuroimaging research on non-linguistic dysfunction in logopenic variant primary progressive aphasia, we propose that a significant portion of multidimensional cognitive features can be explained by degeneration of temporal\/inferior parietal cortices and connected regions. Drawing on insights from normative cognitive neuroscience, we propose that these regions underpin a combination of domain-general and domain-selective cognitive processes, whose disruption results in multifaceted cognitive deficits including aphasia. This account explains the common emergence of linguistic and non-linguistic cognitive difficulties in logopenic variant primary progressive aphasia, and predicts phenotypic diversification associated with progression of pathology in posterior neocortex.<\/jats:p>","DOI":"10.1093\/brain\/awac208","type":"journal-article","created":{"date-parts":[[2022,7,20]],"date-time":"2022-07-20T12:39:09Z","timestamp":1658320749000},"page":"2955-2966","source":"Crossref","is-referenced-by-count":57,"title":["Understanding the multidimensional cognitive deficits of logopenic variant primary progressive aphasia"],"prefix":"10.1093","volume":"145","author":[{"given":"Siddharth","family":"Ramanan","sequence":"first","affiliation":[{"name":"Medical Research Council Cognition and Brain Sciences Unit, University of Cambridge , Cambridge , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4950-8169","authenticated-orcid":false,"given":"Muireann","family":"Irish","sequence":"additional","affiliation":[{"name":"The University of Sydney, Brain and Mind Centre and School of Psychology , Sydney , Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1927-7424","authenticated-orcid":false,"given":"Karalyn","family":"Patterson","sequence":"additional","affiliation":[{"name":"Medical Research Council Cognition and Brain Sciences Unit, University of Cambridge , Cambridge , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"James B","family":"Rowe","sequence":"additional","affiliation":[{"name":"Medical Research Council Cognition and Brain Sciences Unit, University of Cambridge , Cambridge , UK"},{"name":"Department of Clinical Neurosciences, Cambridge University Centre for Frontotemporal Dementia , Cambridge , UK"},{"name":"Cambridge University Hospitals NHS Trust , Cambridge , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria Luisa","family":"Gorno-Tempini","sequence":"additional","affiliation":[{"name":"Memory and Aging Center, University of California San Francisco , San Francisco , USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5907-2488","authenticated-orcid":false,"given":"Matthew A","family":"Lambon Ralph","sequence":"additional","affiliation":[{"name":"Medical Research Council Cognition and Brain Sciences Unit, University of Cambridge , Cambridge , UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2022,7,20]]},"reference":[{"key":"2022091416361753300_awac208-B1","doi-asserted-by":"crossref","first-page":"425","DOI":"10.1002\/ana.91","article-title":"Primary progressive aphasia","volume":"49","author":"Mesulam","year":"2001","journal-title":"Ann Neurol"},{"key":"2022091416361753300_awac208-B2","doi-asserted-by":"crossref","first-page":"1006","DOI":"10.1212\/WNL.0b013e31821103e6","article-title":"Classification of primary progressive aphasia and its variants","volume":"76","author":"Gorno-Tempini","year":"2011","journal-title":"Neurology"},{"key":"2022091416361753300_awac208-B3","doi-asserted-by":"crossref","first-page":"592","DOI":"10.1002\/ana.410110607","article-title":"Slowly progressive aphasia without generalized dementia","volume":"11","author":"Mesulam","year":"1982","journal-title":"Ann Neurol"},{"key":"2022091416361753300_awac208-B4","doi-asserted-by":"crossref","first-page":"1329","DOI":"10.1001\/archneur.1990.00530120075013","article-title":"Primary progressive aphasia. 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