Specifically, the presence of gamma waves, induced by the auditory task at hand, were measured from the temples of the subjects.
The OSP recordings were also characteristically lower in gamma waves, as compared to the complete musical set.
This is contrary to gamma wave oscillatory frequencies which emerge in selective focus tasks.
Many animals, including humans, produce gamma waves (40-60 Hz) when focusing attention on a particular object or activity.
According to a popular theory, gamma waves may be implicated in creating the unity of conscious perception (the binding problem).
A 2009 study published in Nature successfully induced gamma waves in mice brains.
As hinted above, gamma waves have been observed in Tibetan Buddhist monks.
This was observed at a frequency of 25-40 Hz, the rhythm of gamma waves.
The no-room is similarly "not there" for radio waves, gamma waves, X rays, and the like.
They are also thought to give rise to gamma waves recorded in EEG.