While most drugs that affect sleep do so by stimulating sleep onset, or disrupting REM sleep, a number of chemicals and drugs have been shown to alter<unk>  activity. *<unk>  sleep-inducing peptide, as the name suggests, induces<unk>  EEG activity. * Alcohol reduces SWS<unk>  activity, thereby restricting the release of growth hormone (GH) by the pituitary. * The muramyl peptide, muramyl dipeptide (MDP, N-acetylmuramyl-L-alanyl-D-isoglutamine) has been shown to increase<unk>  activity during slow wave sleep. * The drug Gabapentin, a drug used to control epileptic seizures, increases<unk>  activity and slow wave sleep in adults. * While hypnotics like zolpidem increase slow wave sleep, they do not increase<unk>  activity, and instead increase spindle activity during slow wave sleep. * Gamma-hydroxy butyrate (GHB) increases<unk>  slow-wave sleep as well as sleep-related growth hormone (GH). * Administration of high-dose nitrous oxide is associated with transient, large amplitude slow-delta oscillations.
Delta wave
Delta Wave
U wave
P wave 
QRS complex
J wave
T wave
Alpha wave