Dexmedetomidine Versus Chloral Hydrate for Pediatric Sedation During EEG

The purpose of the study is: 1. To compare the efficacy of dexmedetomidine versus chloral hydrate as pediatric sedation agents for EEG studies. Efficacy will be determined by successful EEG study completion and by minimum degree of sedation induced patient agitation (SAS score). 2. To compare the safety and adverse event profile of dexmedetomidine versus chloral hydrate during sedation of pediatric patients for EEG studies. Comparison will be based on variance of vital signs (HR, MAP, RR, O2SAT, ETCO2) from baseline during sedation as well as the frequency of adverse events during and following sedation. 3. To compare quality of EEG recording obtained with dexmedetomidine or chloral hydrate and to those of non-sedated pediatric EEG studies. Quality will be determined by the degree of background beta-wave activity.