Semantic dementia: a unique clinicopathological syndrome
Abstract
Semantic dementia (SD), one of the main clinical variants of frontotemporal dementia, presents a unique combination of clinical and imaging abnormalities. We describe the epidemiological, cognitive, and radiological features of SD. The distinctive and consistent neuropsychological deficits in this disorder have had a major effect on current conceptions of the organisation of semantic memory and its links to episodic memory, language, and perceptual processes. Structural (MRI) and functional (fluorodeoxyglucose-PET) studies in SD emphasise the role of the temporopolar and perirhinal cortices. Unlike other frontotemporal dementia syndromes, the neuropathological findings in SD are fairly predictable: most patients have ubiquitin-positive, tau-negative neuronal inclusions.
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Semantic dementia is typified by progressive degeneration of the anterior temporal lobes, most severe on the ventral surface, including the anterior temporal fusiform gyrus, temporal pole, anterior hippocampus and amygdala.
“From a neural standpoint, semantic dementia is typified by the progressive degeneration of the anterior temporal lobes (Hodges and Patterson, 2007), which is most severe on the ventral surface, including the anterior temporal fusiform gyrus, temporal pole, anterior hippocampus and amygdala (Chan et al., 2001;Galton et al., 2001;Davies et al., 2004;Whitwell et al., 2005;Mion et al., 2010).”
From Considering the role of semantic memory in episodic future thinking: evidence from semantic dementia (2012) · cites this paper as Hodges and Patterson, 2007
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Self-citationAssociative and recognition memory for novel objects in dementia: implications for diagnosis
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Self-citationSEMANTIC DEMENTIA WITH CATEGORY SPECIFICITY:ACOMPARATIVE CASE-SERIES STUDY
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Self-citationPatterns of autobiographical memory loss in dementia
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Repeat and Point: Differentiating semantic dementia from progressive non-fluent aphasia
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Über Picksche Krankheit. pp. 230–252
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Self-citationDiffering patterns of temporal atrophy in Alzheimer’s disease and semantic dementia
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ON APHASIA DUE TO ATROPHY OF THE CEREBRAL CONVOLUTIONS
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Self-citationCan episodic memory tasks differentiate semantic dementia from Alzheimer's Disease?
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Self-citationDrawing as a ‘window’ on deteriorating conceptual knowledge in neurodegenerative disease
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Referral Patterns for Syndromes Associated With Frontotemporal Lobar Degeneration
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Self-citation
Flagged first, then by citations
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The neural and computational bases of semantic cognition
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Self-citationBehavioural-variant frontotemporal dementia: diagnosis, clinical staging, and management
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Considering the role of semantic memory in episodic future thinking: evidence from semantic dementia
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Self-citationVisser, M., Jefferies, E., Embleton, K. V., & Lambon Ralph, M. A. (2012) · Journal of Cognitive Neuroscience · doi:10.1162/jocn_a_00244 · Cited by 369 · see citing works
The Cortical Organization of Syntax
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The Pivotal Role of Semantic Memory in Remembering the Past and Imagining the Future
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Frontotemporal lobar degeneration
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Differentiating primary progressive aphasias in a brief sample of connected speech
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Abnormalities of connected speech in semantic dementia vs Alzheimer's disease
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Self-projection and the default network in frontotemporal dementia
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Neural correlates of retrieval-based memory enhancement: an fMRI study of the testing effect
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Impaired capacity for prospection in the dementias—theoretical and clinical implications
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Clinical diagnostic criteria and classification controversies in frontotemporal lobar degeneration
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White matter tract signatures of impaired social cognition in frontotemporal lobar degeneration
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Self-citationPrimary progressive aphasias and apraxia of speech
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Bringing words back to mind – Improving word production in semantic dementia
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Self-citationSleep Disturbances in Frontotemporal Dementia
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- Authors
- Hodges, J. R., & Patterson, K.
- Affiliations
- MRC Cognition and Brain Sciences Unit (GB)
- Venue
- The Lancet Neurology
- Publisher
- Elsevier BV
- Published
- 2007-11
- Volume
- 6
- Issue
- 11
- Pages
- 1004-1014
- ISSN
- 1474-4422 (ISSN-L)
- OpenAlex
- W2138973641
- Cited by
- 772
- References
- 125
- Citations by year
- 2026: 18 · 2025: 35 · 2024: 37 · 2023: 27 · 2022: 31 · 2021: 50 · 2020: 48 · 2019: 49 · 2018: 31 · 2017: 49 · 2016: 37 · 2015: 44 · 2014: 50 · 2013: 47 · 2012: 58
- FWCI
- 5.54
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- The Lancet Neurology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neurobiology of Language and Bilingualism
- Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
- Keywords
- semantic dementia, frontotemporal dementia, semantic memory, perirhinal cortex, neuropsychological deficits, MRI findings, FDG-PET, episodic memory, language impairment
- MeSH terms
- Dementia, Frontal Lobe, Humans, Magnetic Resonance Imaging, Memory, Neuropsychological Tests, Temporal Lobe, Verbal Behavior, Positron-Emission Tomography
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