Examine the neural bases of sleep by doing the following: Analyze the role of different hormones in the sleep/wake cycle. Examine the role of the reticular activating system in the sleep/wake cycle. Examine the physical changes that occur in the body and specifically the somatosensory system during sleep. (What changes occur in the somatosensory system during sleep to prevent us from acting out our dreams?) Analyze the different stages that occur during sleep and the theoretical processes believed to be involved in dreaming. Differentiate findings of research based on polysomnography using EEG, EMG, and EOG that can be used to explore the neuropsychological processes involved in sleep