I have been using Muse 2 for over 100 sessions. I mix it up between mind meditation with the rainforest sounds and guided meditation. Normally my mind meditation produces graphs that are spikey like the first part of the mind meditation on May 18 5:41 am or the calm graph on May 18 5:27 am. Some of the guided meditations use various visualization techniques and the graphs are spikey. Recently I have started to do my own guided meditation with the rainforest sounds with focus on very intense visualization and very shallow breathing. The results are the square waves on the May 18 5:41 am graph. The guided meditation on May 18 5:27 am. shows normal results. I have other graphs on different days that show the square waves and spikey waves. The square waves are reproducible if I do heavy visualization in mind meditation and return to spikey when I do normal mind mediation. I don’t seem to be losing Blue tooth contact because the graphs are continuous. The length of the meditation does not seem to be a factor since I have examples of short and long sessions with square wave graphs.
What is causing the square waves? Am I confusing the Muse 2 algorithm by prolonged visualization of the same subject because my mind does not wander? (I do get birds.)