semantic dementia


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semantic dementia

A subtype of frontotemporal lobar degeneration characterised by specific loss of comprehension of language and impaired facial and object recognition; memory is relatively preserved in the early stages of disease.

semantic dementia

Any of a group of brain disorders marked by nearly complete losses in the understanding of word meanings, spelling, and the identification or recognition of facts, faces, or objects. The disease is marked pathologically by local atrophy in the neocortex of the temporal lobe of the brain.
See also: dementia
References in periodicals archive ?
Comparative semantic profiles in semantic dementia and Alzheimer's disease.
1999) : the differentiation of semantic dementia and frontal lobe dementia (temporal and frontal variants of frontotemporal dementia) from early alzheimer's disease: comporative neuropsychological study.
Common and differing patterns of brain atrophy in frontotemporal dementia and semantic dementia.
i) Patients with semantic dementia reveal the way in which selective impairment of conceptual knowledge affects the ability to maintain sequences of speech sounds that make up words.
A combined neuropsychological and neuroimaging study of topographical and non-verbal memory in semantic dementia.
Later, this condition was also described by Snowden et al (3) as semantic dementia (SD).

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