Page 6 - EEG of Newborn and Infants

EEG change in newborn

Less than 29 wks Tracé discontinu (continuously discontinuous and bilaterally synchronous)
Delta brush emerge at 26 weeks

29-31 weeks Greater periods of continuous activity, suppression periods les than 30 sec
Frequent delta brushes, temporal theta burst pattern

32-34 weeks EEG reactivity to stimulation established
34-37 weeks Periods of diffuse attenuation less than 15 sec
After 38 weeks Abundant multifocal sharp transients and delta brushes

Delta brushes appear less often and multifocal sharp transients less frequent
Frontal sharp transients appear
Tracé discontinu pattern is replaced by tracé alternant

Low voltage irregular (LVI) in waking and active sleep
Mixed voltage (MV) pattern in waking, transitional and active sleep
High voltage slow (HVS) in quiet sleep
Tracé alternant (TA) in quiet sleep

Fisch BJ EEG Primer 1999