What would be concerning in the background of an EEG of a 65-year-old patient?

In the context of an EEG for a 65-year-old patient, the absence of an alpha background is concerning. Alpha waves, typically seen in the EEG of a healthy adult at rest with their eyes closed, signify a normal brain state. In older adults, the presence of alpha activity is expected, and its absence can indicate various neurological issues such as brain dysfunction or significant cognitive decline.

The presence of alpha waves is a reflection of healthy cortical functioning. Therefore, when these waves are not present, it raises the possibility of underlying pathology. This might include conditions such as generalized cerebral atrophy, dementia, or other neurodegenerative processes that could lead to changes in cerebral activity.

Other findings in the EEG, such as theta waves or periodic lateralized epileptiform discharges, could be clinically significant as well. Theta waves often can indicate drowsiness or more severe conditions. However, the lack of alpha waves stands out as a more immediate concern in older patients, as it may suggest a more significant decline in cognitive function or cerebral health.