Created by Carole Yue.
Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/processing-the-environment/sleep-and-consciousness/v/dreaming?utm_source=YT&utm_medium=Desc&utm_campaign=mcat
Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/processing-the-environment/sleep-and-consciousness/v/sleep-and-consciousness?utm_source=YT&utm_medium=Desc&utm_campaign=mcat
MCAT on Khan Academy: Go ahead and practice some passage-based questions!
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
For free. For everyone. Forever. #YouCanLearnAnything
Subscribe to Khan Academy’s MCAT channel: https://www.youtube.com/channel/UCDkK5wqSuwDlJ3_nl3rgdiQ?sub_confirmation=1
Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Interesting. My son sleep walks. Plus 6 and half years ago my boyfriend would wake in the night and try force himself on me. It was scary because he felt so strong. But thing is he never remember doing it
Interesting sometimes i would wake up at night and be super horny and have sex with my girlfriend really rough when she was asleep but it was like i was in a sensual trance and didn't think logically. She was info stuff like that though so she never did mind
Yayee P. Stage 4 of sleep is the closest thing to coma. Basically coma is a strong stage 4. Usually the majority of people during sleep reach stage 3 maximum and rarely stage 4 or if so only for little time
Though might be true, your correction is quite insignificant in its impact given the type of substance in the video and the level of scientific sophistication of the viewers. In an hour, I guarantee you all the thetas and alphas mentioned in this video will be gone and probably just the gist of the concepts will remain with us non experts. And that's not an insult to you or an attempt to be condescending.
Every time I have woken up (voluntarily or suddenly due to external stimuli), I have just been dreaming. This has been the case throughout my life. Does that mean I don't get really deep, restorative/regenerative sleep? Can one get really good, restorative sleep while dreaming? Thank you.
Stage 1 only has Theta waves. I'm reading it on my First Aid for USMLE Step 1 book. Also mentions it on Wikipedia :p.
Stage 2 only has what Khan Academy mentioned: sleep spindles and potassium complexes.
I read that stage one involves alpha and theta, because alpha is already there from being relaxed and theta is there because it is the transitional period between awake and sleep. Then it is totally theta and total sleep at stage two.
I though total wake and arousal is beta?
Interesting topic, but it is a strain to listen to this video because of the constant "up-talking". See: http://www.psychologytoday.com/blog/caveman-logic/201010/the-uptalk-epidemic for a good explanation. This bad habit is not just with young women anymore; men are doing it too.
I hope my comment is taken as intended, which is to help produce better learning experience by speaking smoothly allowing the listener to focus on the information, not on the speaker.
+Myiphone5 There was no attack whatever, and besides not reading my comment, you obviously you didn't read my link. So, if you don't like my comment, "that is personal and you should keep it to yourself and move on." Sheesh, grow up, would you?
Antidepressants are medications that can help relieve symptoms of depression, social anxiety disorder, anxiety disorders, seasonal affective disorder, and dysthymia, or mild chronic depression, as well as other conditions.
They aim to correct chemical imbalances of neurotransmitters in the brain that are believed to be responsible for changes in mood and behavior.
Depression Medications (Antidepressants)
These are the most commonly prescribed type of antidepressant.
Serotonin and noradrenaline reuptake inhibitors (SNRIs) are used to treat major depression, mood disorders, and possibly but less commonly attention deficit hyperactivity disorder (ADHD), obsessive-compulsive disorder (OCD), anxiety disorders, menopausal symptoms, fibromyalgia, and chronic neuropathic pain.
SNRIs raise levels of serotonin and norepinephrine, two neurotransmitters in the brain that play a key role in stabilizing mood.
Selective serotonin reuptake inhibitors (SSRIs) are the most commonly prescribed antidepressants. They are effective in treating depression, and they have fewer side effects than the other antidepressants.
SSRIs block the reuptake, or absorption, of serotonin in the brain. This makes it easier for the brain cells to receive and send messages, resulting in better and more stable moods.
They are called "selective" because they mainly seem to affect serotonin, and not the other neurotransmitters.