Respiration-Entrained Brain Rhythms Are Global but Often Overlooked
Authors: Tort ABL, Brankačk J, Draguhn A
CellNetworks People: Draguhn Andreas
Journal: Trends Neurosci. 2018 Apr;41(4):186-197. doi: 10.1016/j.tins.2018.01.007

We revisit recent evidence showing that nasal respiration entrains oscillations at the same frequency as breathing in several regions of the rodent brain. Moreover, respiration modulates the amplitude of a specific gamma sub-band (70-120Hz), most prominently in frontal regions. Since rodents often breathe at delta and theta frequencies, we caution that previous studies on delta and theta power and their cross-regional synchrony, as well as on delta-gamma and theta-gamma coupling, may have detected the respiration-entrained rhythm and respiration-gamma coupling. We argue that the simultaneous tracking of respiration along with electrophysiological recordings is necessary to properly identify brain oscillations. We hypothesize that respiration-entrained oscillations aid long-range communication in the brain.