Behavioural assessment may help differentiating between different forms of dementia, further stressing the need for the development of new and more sensitive behavioural assessment scales. By means of the MFS, frontal lobe involvement was frequently observed in DLB. As 70% of FTD patients displayed apathy, prevalence was about two times higher compared to the other disease groups, meanwhile indicating that apathy is frequently observed in dementia, irrespective of its etiology.
The MFS is a clinical and behavioural assessment scale that measures frontal lobe features and that was shown to reliably discriminate FTD from AD patients.
The observed negative correlations between levels of vitamin B12 and folate and cognitive impairment in both AD and FTD patients, raise the possibility of a non-specific etiological role. Although levels of vitamin B12 and folate did not correlate with BPSD in AD patients, negative correlations between serum vitamin B12 levels and BPSD in FTD patients were revealed. Decreased serum vitamin B12 levels may predispose FTD patients to develop hallucinations and diurnal rhythm disturbances.
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