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A gamma wave or gamma rhythm is a pattern of neural oscillation in humans with a frequency between 30 and 100 Hz, the 40 Hz point being of particular interest. [1] Gamma rhythms are correlated with large-scale brain network activity and cognitive phenomena such as working memory , attention , and perceptual grouping , and can be increased in ...
For example, the interference of two pitches can often be heard as a repetitive variation in the volume of the tone. This amplitude modulation occurs with a frequency equal to the difference in frequencies of the two tones and is known as beating. The semitone scale used in Western musical notation is not a linear frequency scale but logarithmic.
The mu wave is detectable during infancy as early as four to six months, when the peak frequency the wave reaches can be as low as 5.4 Hz. [5] [14] There is a rapid increase in peak frequency in the first year of life, [14] and by age two frequency typically reaches 7.5 Hz. [11]
For instance, GABA concentration has been shown to be positively correlated with frequency of oscillations in induced stimuli. [41] A number of nuclei in the brainstem have diffuse projections throughout the brain influencing concentration levels of neurotransmitters such as norepinephrine , acetylcholine and serotonin .
Diagram of beat frequency. In acoustics, a beat is an interference pattern between two sounds of slightly different frequencies, perceived as a periodic variation in volume whose rate is the difference of the two frequencies. With tuning instruments that can produce sustained tones, beats can be readily recognized.
Binaural recording is a method of recording sound that uses two microphones, arranged with the intent to create a 3D stereo sound sensation for the listener of actually being in the room with the performers or instruments.
It involves the effective and repetitive relaxation of 14 different muscle groups and has been used to treat anxiety, tension headaches, migraines, TMJ, neck pain, insomnia, bipolar disorder, anxiety, backaches, high blood pressure, etc. [17] PMR is a two-step practice that involves creating tension in specific muscle groups and then releasing ...
Relaxation can help with many impairments that can occur in one's mental health. There is a higher mood and lower anxiety in those who practice relaxation techniques. [3] Those who are relaxed have much slower and clearer thought processes than those who are not relaxed; this can be shown on an EEG. [48]