A team at the Ernst Strüngmann Institute (ESI) for Neuroscience in Frankfurt, working with the Max Planck Society, demonstrated that the brain uses distinct channels or frequency bands to communicate in different areas and even directions. This study extends earlier work on macaque monkeys. This addresses open questions, including the feedback of visual attention information to the Visual Cortex, such as indicating an item to attend to, that follows similar paths as visual information, but in the opposite direction.
Nerve cells are operate in alpha, beta and gamma channels, which have different frequency ranges, allowing them to distinguish signals moving in opposite or distinct directions.
“The brain communicates on several channels: The human brain uses several frequency bands for the flow of information between lower and higher areas.” ScienceDaily, 28 January 2016
www.sciencedaily.com/releases/2016/01/160128133249.htm