theta rhythm: the normal brainwave in the encephalogram of a person who is awake but relaxed and drowsy; occurs with low frequency and low amplitude
brainwave: (neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph
pseudepigrapha: 52 texts written between 200 BC and AD 200 but ascribed to various prophets and kings in the Hebrew scriptures; many are apocalyptic in nature