[Electroencephalography in delirium superimposed on dementia]

Area of Science:

• Neurology
• Geriatrics
• Neurophysiology

Background:

• Delirium superimposed on dementia (DSD) presents diagnostic challenges.
• DSD symptoms can mimic or be masked by pre-existing cognitive impairment.
• Accurate differential diagnosis is crucial for appropriate patient management.

Purpose of the Study:

• To review the literature on electroencephalography (EEG) utility in differentiating delirium, dementia, and DSD.
• To explore the feasibility of using EEG for DSD diagnosis in psychogeriatric patients.

Main Methods:

• Literature review of studies on EEG in differential diagnosis of delirium, dementia, and DSD.
• Analysis of conventional EEG limitations in psychogeriatric settings.
• Evaluation of recent findings on short-term, limited-electrode EEG for delirium detection.

Main Results:

• Conventional EEG is often impractical for psychogeriatric patients.
• Emerging evidence indicates that brief EEG with few electrodes can reliably detect delirium.
• This approach shows potential for diagnosing delirium in patients with cognitive impairment or dementia.

Conclusions:

• Limited EEG offers a promising, feasible tool for diagnosing delirium in patients with underlying cognitive decline.
• Further research can establish EEG's role in the differential diagnosis of DSD.
• This could lead to improved diagnostic accuracy and patient care.