Sleep Stages EXPLAINED | REM (Dream Sleep), NREM (Deep Restful Sleep), and Wakefulness скачать в хорошем качестве

Sleep Stages EXPLAINED | REM (Dream Sleep), NREM (Deep Restful Sleep), and Wakefulness

Ever wondered what happens when you sleep? Join us as we dive into the fascinating world of REM and Non-REM sleep! 💤 Support: Patreon: https://buymeacoffee.com/masteryneuro Instagram: https://www.instagram.com/mastery_neu... Discord | Mastery:   / discord   Discord | Books & Beyond:   / discord   In this video, we explore: The two main types of sleep: REM (Rapid Eye Movement) and Non-REM sleep. How REM sleep is associated with vivid dreams and temporary paralysis to protect you from acting out your dreams. The stages of Non-REM sleep, ranging from light sleep to the deep, restful sleep where your body recovers and grows. The role of an EEG (electroencephalograph) in recording brain activity during different sleep stages. -The importance of REM and Non-REM sleep in physical and emotional recovery. Why we experience phenomena like hypnic jerks and sleep spindles. The purpose of REM rebound and how your body compensates for lack of REM sleep. Don't forget to like, subscribe, and hit the notification bell for more insightful content. Sweet dreams! 🌙✨ Transcript: There are two kinds of sleep – REM sleep or Rapid Eye Movement sleep and Non-REM sleep or Non Rapid eye moment. It’s named like that because if you watch a person while they’re sleeping, which can be a bit creepy and you just hope that they don’t open their eyes, but if you do watch them closely youll notice right before they go to sleep, their eyes move rapidly up and down. And that’s why its called rapid eye movement sleep. REM sleep is also known as dream sleep because this stage is where your dreaming takes place. In this stage your voluntary muscles are restrained. Sort of like becoming paralyzed. Because who knows what based on what youre dreaming you may do a backflip and break your neck while sleeping. So in order to protect you your brain paralyzes your body in REM sleep. Non-REM sleep is the opposite. It can span from lighter stages to a much deeper, and restful kind of sleep. You are free to move your body in Non-REM sleep so a lot of kicking can happen. A machine called electroencephalograpgh or EEG allows scientists to record brain-wave activity as a person passes through different stages of sleep. Firstly, when youre wide awake and mentally alert, EEG machine shows a pattern called beta waves. Beta waves are very small and fast. As you get drowsy and begin to fall asleep, slower and slightly larger alpha waves appear. As you get deeper into sleep, even slower theta waves appear. There’s 3 stages of NREM sleep . If you look at some older studies, NREM sleep was actually divided into 4 stages but later stages 3 and 4 of NREM sleep was combined to become a single stage. For this we were refer W as wakefulness, R as REM sleep, N1 as stage 1 of NREM sleep, N2 as stage 2 of NREM and N3 as stage 3 of NREM. N1 is also known as Light sleep. As theta wave activity increases and alpha wave activity fades away, people are said to be entering N1 sleep. In this stage people might experience hypogogic images and might refuse to believe that you were actually asleep. A much more common occurrence in this stage is what is known as the hypnic jerk. As youre drifting off when your body gives a sudden jerk. There’s no proof of why this happens but many believe that it’s probably because our ancestors used to sleep on trees at some point: The relaxation of the muscles as one drifts into sleep causes a “falling” sensation, and so your body jerks awake in order to prevent the fall. Who knows how many brains of our ancestors had to learn this the hard way. Next is N2 stage also call Sleep Spindles. As you drift further into sleep, your body temperature will continue to crop making it cooler. Heart rate will slow and the breathing becomes more shallow and irregular. This is when the EEG shows it’s first signs of sleep spindles which are short bursts of energy lasting only a second or two. N3 stage is where Delta waves enter. Now you are in the deepest possible sleep, also called slow. People in deep sleep are really hard to awaken. Even if you do wake them up they may feel confused and disoriented. Children are even harder to wake up in this sleep than adults. Deep sleep is also when body growth occurs which explains why children in periods of rapid growth need more sleep and how less sleep can hinder their growth. REM: After Spending some time in N3, the sleeping person will go back up to N2 to near waking level, th eyes will move rapidly under the eyelids, heart will beat fast, body temperature will increase and the brain waves will show beta waves. The person is still asleep though but in REM sleep. Chapters: 00:00 Introduction 00:13 REM sleep 00:30 Sleep Paralysis 00:53 Electroencephalograph EEG 01:01 Brain wave activity 01:50 N1 stage of NREM sleep 01:53 Hypnic Jerk 02:17 N2 stage: Sleep spindles 02:37 N3 stage - Delta waves 03:09 REM 03:57 Purpose of REM and NREM 04:21 Outro