noun[mass noun] Physiology
- Electrical activity observed in the brain under certain conditions, consisting of oscillations ( theta waves) with a frequency of 4 to 7 hertz.More example sentences
- Significant slowing of brain wave activity, i.e., increased theta wave activity, was observed on EEG. Memory testing suggested increased errors of commission.
- All 10 patients had frontal-temporal theta wave activity, which indicated diffuse changes characteristic of metabolic encephalopathy.
- The new development is that scientists have discovered that increased theta wave activity also enhances performance skills including musical understanding, imagination, and communication with the audience.