Electroencephalogram (EEG) is used to measure electrical activity in the brain. Individuals with Alzheimer’s disease (AD) often demonstrate a slowing of neuronal activity as measured by EEG.

Neurons communicate and perform all functions using electrical impulses. EEG captures this electrical activity through small electrodes placed on the scalp and displays these electrical impulses as waves (see illustration below).

About EEG:

The electrical activity will present at different frequencies or waves which provide various insights into neuronal health.

Individuals with AD typically experience a general slowing of EEG, including a reduction in higher frequency waves, such as gamma.

Gamma power is typically associated with learning, memory and cognitive function. We are most focused on the faster, higher frequency gamma waves which are associated with learning, memory formation and higher cognitive functions.

Quantitative EEG (qEEG) is a method to quantitatively determine the amount of the electrical signal that resides in each waveform, often described as power.

Athira utilizes a qEEG to measure the impact of treatment on brain wave signals.

Noninvasive EEG Recordings Reflect Brain Activity and Function