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Semantic dementia



General outline    Another peculiar language disorder with prominent impairment of meaning (words, objects, and faces) gradually progressing into FTD

Synonyms   

Symptoms    Starts with anomia, patients will ask for the meaning of words or objects and may initially appear to have a hearing disorder. Patients may develop routines for eating (compulsive).

Course    Gradually progressive, after 5 years developing into FTD.

Age of onset: same as FTD; Average survival as FTD.

Caregiver problems    Communication, and sometimes aloof, rigid, repetitive behaviours of patients.

Epidemiology: VERY RARE DISEASE

Aetiology    Same as PPA (heterogeneous), depends on localisation. The localisation of the degenerative process is left temporal .

DIAGNOSTIC PROCEDURES    : Semantic impairment, hypoperfusion of the temporal cortex, bilateral but with a left predominance