We constructed several prototype devices for trials aimed at preventing this, using a single-channel EEG reading to measure theta-wave activity.
From the newscientist.com
Earlier experiments showed rats'brain cells in this area fire continuously in a rhythmic electrical signal called a theta wave when the animals are navigating through space.
From the sciencedaily.com
When we meditate, we alter the brain wave patterns to alpha or theta states.
From the noomii.com
The holomorphic parts of certain weak Maass wave forms turn out to be essentially Ramanujan's mock theta functions.