Behavioral neuroscience discoveries have proceeded at a rapid pace. This series highlights cutting-edge findings and explains their importance for neurofeedback providers and their clients. This initial installment focuses on sleep. Click on our narrator icon to listen to this post. Sleep Architecture Overview We can divide sleep into non-REM (NREM) sleep which contains three stages, and rapid eye movement (REM) sleep . Stage 3 sleep (NREM3) , termed slow-wave sleep and RE