- published: 18 Sep 2015
- views: 139258
The theta rhythm is an oscillatory pattern in EEG signals recorded either from inside the brain or from electrodes glued to the scalp. Two types of theta rhythm have been described. The "hippocampal theta rhythm" is a strong oscillation that can be observed in the hippocampus and other brain structures in numerous species of mammals including rodents, rabbits, dogs, cats, bats, and marsupials. "Cortical theta rhythms" are low-frequency components of scalp EEG, usually recorded from humans.
In rats, the most frequently studied species, theta rhythmicity is easily observed in the hippocampus, but can also be detected in numerous other cortical and subcortical brain structures. Hippocampal theta, with a frequency range of 6–10 Hz, appears when a rat is engaged in active motor behavior such as walking or exploratory sniffing, and also during REM sleep. Theta waves with a lower frequency range, usually around 6–7 Hz, are sometimes observed when a rat is motionless but alert. When a rat is eating, grooming, or sleeping, the hippocampal EEG usually shows a non-rhythmic pattern known as Large Irregular Activity or LIA. The hippocampal theta rhythm depends critically on projections from the medial septal area, which in turn receives input from the hypothalamus and several brainstem areas. Hippocampal theta rhythms in other species differ in some respects from those in rats. In cats and rabbits, the frequency range is lower (around 4–6 Hz), and theta is less strongly associated with movement than in rats. In bats, theta appears in short bursts associated with echolocation. In humans and other primates, hippocampal theta is difficult to observe at all.
8 Hours Powerful Healing Theta Waves for: Deep Meditation, Improve Memory, DNA Repair, Sleep
PURE THETA WAVES: Meditation (Track: Cosmic Theta Waves)
PURE THETA WAVES: Meditation (Track: Cosmic Theta Waves)
8 Hour Sleep Music Theta Waves: Relaxing Meditation Music for Deep Sleep with Binaural Waves ☯011
8 Hours Sleep Music | Space Ambient with Theta Waves | Background Deep Meditation, Stress Relief
8 Hour Deep Sleep Music Theta Waves: Sleep Music, Calming Music, Soothing Music, ☯131
Theta Waves Music: Deep Sleep Music, Theta Binaural Beats Soothing Music for Brain Power
8 Hour Sleep Music Theta Waves: Deep Sleep Meditation, Sleep Music to Beat Insomnia ☯219
1hr Theta Binaural Beat Session (7hz) ~ Pure
WARNING ! EXTREMELY POWERFUL THETA WAVES BINAURAL BEATS WITH ISOCHRONIC TONES - SLEEP
The unsettled mind is at times an ally,
Leaving the senses to fend for them selves,
The senses collect undeniable data,
About beta carotine and theta waves,
The unsettled mind is at times an ally,
Leaving the senses to fend for them selves,
Then, the senses wonder the sky.
All rise,
I fall,
Time feels like a midnight ride
Finality waits outside,
Weeping in perplexitys´ arms
Caressing our smiles inside.
The National debt is at times ally,
Leaving the people to fend for them selves,
The people collect undeniable data,
About high pulse weapons and microwaves,
The National debt is at times an ally,
Leaving the people to fend for them selves,
The the people found out the lie.
All rise,
I fall,
Now I rise, and then fall,
Time feels like a midnight ride
Finality waits outside,
Weeping in perplexitys´ arms
Caressing our smiles inside.
Waiting to get you high,
Waiting to touch the sky.
All rise,
I fall,
Now I rise, and then fall,
Time feels like a midnight ride
Finality waits outside,
Weeping in perplexitys´ arms