400px<unk> s are high amplitude neural oscillations with a frequency between 0.5 and 4 hertz.<unk> s, like other brain<unk> s, can be recorded with electroencephalography (EEG) and are usually associated with the deep stage 3 of NREM sleep, also known as slow-wave sleep (SWS), and aid in characterizing the depth of sleep.<unk> s are the slowest recorded brain<unk> s in human beings. They are found most often in infants and young children, and are associated with the deepest levels of relaxation and restorative, healing sleep. Delta is prominently seen in brain injuries, learning problems, inability to think, and severe ADHD. 500px
Delta wave
Delta Wave
U wave
P wave 
QRS complex
J wave
T wave
Alpha wave