Semantic dementia | definition of semantic dementia by Medical dictionary
Also found in: Dictionary
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.
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.
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
A reversal of the temporal gradient for 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