Center for Information and Neural Networks 1 article published in JoVE Neuroscience Simultaneous Recordings of Cortical Local Field Potentials, Electrocardiogram, Electromyogram, and Breathing Rhythm from a Freely Moving Rat Yu Shikano1, Takuya Sasaki1, Yuji Ikegaya1,2 1Graduate School of Pharmaceutical Sciences, The University of Tokyo, 2Center for Information and Neural Networks This study introduces a method for the simultaneous recording of local field potentials in the brain, electrocardiograms, electromyograms, and breathing signals of a freely moving rat. This technique, which reduces experimental costs and simplifies data analysis, will contribute to the understanding of the interactions between the brain and peripheral organs.