Normal Occurrence of Theta Waves • Theta waves oscillate about 3.5 – 7.5 times per second (Hz). • Some consider Theta to be from 4 – 8 Hz. • Theta is normal in small very amounts in the healthy waking adult EEG.

Enter the dreamlike Theta state without falling asleep. Artas Sam 6.1 Crack there. Brainwave Therapy makes it easy to drop into meditative states, even if you've never meditated before.

It creates a tone that is like a plane of sound that exists between the eyes all the way through your brain to the. Theta Waves — 4-7 Hz: Brainwave Entrainment. May 01, 2015 This is a humming sound for your brain to get into Theta. Theta State is a state of very deep relaxation; it is used in hypnosis and during REM Sleep.

• Theta in the adult waking EEG should be symmetrically distributed. • Theta is more prominent and considered normal in the raw EEG’s of children & adolescents unless there is clear indication of pathology.

• Theta at the scalp surface in the adult EEG is normal as part of the early stages of drowsiness. • Theta may occur in some individuals who are day dreaming.

• Some individuals produce a frontal-midline Theta (FZ) under task conditions that can be recorded at the scalp and is dependent on task difficulty and reflects transfer of information to long-term memory / memory functions. Abnormal Occurrence of Theta Waves • Excessive Theta activity in the waking raw EEG of adults is considered abnormal. It can represent reduced metabolism cortical grey matter (too little oxygen uptake).

Eastenders Theme Tune on this page. • Theta that is asymmetrically distributed in the waking adult EEG is considered abnormal (more on one side than the other) • Spike and slow wave complexes that occur in seizure disorder often occur in the Theta frequency range. • Excessive Theta on quantitative analysis is often seen in conditions such as • ADHD • Learning disabilities • Head injuries or brain lesions • Certain neurological disorders.

Physiological Origin of Theta Wave Rhythms • Cortical Theta generation in humans is projected to the cortex via Thalamo-cortical projections and is influenced by GABAergic / Cholinergic inhibitory & excitatory inputs from the Reticular Activating System. • Cortical Theta is essentially a slowing of the Alpha rhythm but may also be influenced by limbically generated (septo-hippocampul) Theta as described below. • Sub-cortical Theta Rhythms are prominent in the Hippocampus & Limbic system and result from alternating inhibition / disinhibition between the septal nuclei & hippocampal nuclei. • Limbic Theta oscillations are caused by alternating inhibition / disinhibition of GABAergic & Cholinergic neurons. • The hippocampus is part of the “Papez Circle” including the Hippocampus (HIP), Entorhinal Cortex in Temporal Lobes, Sensory areas of the Temporals & Parietals, the Mammillary Bodies of the Hypothalamus, and the Thalamus that are involved in memory consolidation.