Welcome back to THE IAS COMPANION. Follow us on YouTube: ⁠www.youtube.com/@IASCompanion⁠. Today, we will explore the fascinating altered state of consciousness—sleep. We’ll discuss its mechanisms, the brain wave patterns involved, and the stages of sleep (NREM and REM). We'll also examine the effects of sleep deprivation on the body and brain. Additionally, we’ll delve into the nature of dreams and explore major theories, including Freud’s psychoanalytic theory, the information processing model, and the activation-synthesis hypothesis. Finally, we’ll briefly touch on extra-sensory perception (ESP) and inter-sensory perception. #UPSC #IASprep #civilserviceexam #IASexamination #IASaspirants #UPSCjourney #IASexam #civilservice #IASgoals #UPSC2024 #IAS2024 #civilservant #IAScoaching #aUPSCmotivation #IASmotivation #UPSCpreparation #IASpreparation #UPSCguide #IASguide #UPSCtips #IAS #UPSCbooks #IASbooks #UPSCexamstrategy #IASexamstrategy #UPSCmentorship #IASmentorship #UPSCcommunity #IAScommunity #UPSCpreparation #IASpreparation #UPSCguide #IASguide #UPSCtips #IAStips #UPSCbooks #IASbooks #UPSCexamstrategy #IASexamstrategy #UPSCmentorship #IASmentorship #UPSCcommunity #IAScommunity