The Memory Function of Sleep Across the Lifespan.- Sleep Deprivation, Cognitive Functions and Counter-measures.- Sleep Loss and Neuronal Stress.- The Role of Sleep in Homeostatic Regulation of Ionic Balances and its Implication in Cognitive Functions.- Sleep and Brain Plasticity.- The Role of Sleep in Emotional Processing.- Sleep, Stress, and Traumatic Memory.- The Distinctive Role of NREM and REM sleep in the Consolidation of Fear Memory.- Sleep and Appetitive Conditioned Memory. sakriti opis