The skull is a very poor conductor of electricity; it tends to \u201csmoosh\u201d (to use a technical term) the EEG from a fairly broad area\u2013about 10 square centimeters of brain surface.\u00a0 That\u2019s one reason why it\u2019s not absolutely critical to be in an exact site to train a specific area of the brain.<\/p>\n
Also, neurons tend to work in pools (like synchronized swimmers), so we aren\u2019t really looking at the summed results of a bunch of individual neurons but of much larger batches working together.\u00a0That\u2019s why coherence is so much stronger between two sites the closer together they are.\u00a0And that\u2019s why the likelihood of training a monopolar montage is not terribly likely to increase coherence or reduce phase angle at one site\u2013because they are already pretty high.<\/p>\n
An individual neuron (or neuron pool) firing doesn\u2019t produce an amplitude (since amplitude is measured in microvolts, and voltage is a measure of the difference in electrical force between two sites), and it doesn\u2019t produce phase (since phase is a relationship between two lines with peaks and troughs.)\u00a0 An individual neuron\/pool just does what it does, and we apply these various measures to it in comparison with some other site.<\/p>\n
Neurons generally have a recharge period between firings, they don\u2019t fire consistently as fast as they can, so although a pulse may be quite short, the number of pulses per second are not in the range of hundreds of Hz.<\/p>\n","protected":false},"excerpt":{"rendered":"
Hearing the Signal The skull is a very poor conductor of electricity; it tends to \u201csmoosh\u201d (to use a technical term) the EEG from a fairly broad area\u2013about 10 square centimeters of brain surface.\u00a0 That\u2019s one reason why it\u2019s not absolutely critical to be in an exact site to train a specific area of the […]<\/p>\n","protected":false},"author":112,"featured_media":0,"parent":0,"menu_order":7,"template":"","meta":{"_acf_changed":false},"topic":[781],"class_list":["post-39692","answer","type-answer","status-publish","hentry","answer_topic-understanding-frequencies"],"acf":[],"yoast_head":"\n