Vascular Dementia

Semantic Dementia

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Semantic dementia, which has also been called "temporal variant FTD," accounts for 20% of FTD cases. Language difficulty, the predominant complaint of people with SD, is due to the disease damaging the left temporal lobe, an area critical for assigning meaning to words. The language deficit is not in producing speech but is a loss of the meaning, or semantics, of words.

Semantic Dementia is one of the three canonical clinical syndromes associated with front temporal lobar degeneration.