| What is stage 5 of sleep? | REM, deaming. Movement inhibitation, complete prarlysis of body. |
| How long is a sleep cycle? | 90 minutes |
| How long does an adult need to sleep? | 7-8 hours |
| Main fuction of sleep? (most important) | Needed for survival, of you dont sleep and get sleep deperivation it can kill you |
| One physiological effect of sleep deprivation? | Affecting the nuerones, the brain wont be able to repair themselves |
| One psychological effect of sleep deprivation? | Cognitvie functiing is imparied, person finds it hard to function at a high level. |
| Benefit of REM sleep? | Associated with an increase in protiens, help to stimulate learning |
| What is a circadian rhythm? | A biological cycle that lats for 24 hours |
| What is ultradian rhythm? | A biological cycle that last for less thant 24 hours |
| What is infradian rhythm? | A biological rhythm that last for more than 24 hours |
| Examples of circadian rhythm, ultradian rhythm and infradian rhthem | Sleep-wake cycle, sleep cycle and menstrual cycle |
| Waht is the suprachiasmatic nuclei? (SCN) | Controls the circadiam rhythem and detects light |
| What is an endogenous pacemaker? | A internal biological clock |
| What external facotrs regulate circadian rythem? | Light and diet can help |
| What are exogenous zeitgebers? | External cues that synchronise our biological rhythems |
| What is the sleep wake cycle made up of? | 5 cycles of 90 mins stages of REM and NREM, lasts abt 7.5 hours |
| What is melotonin? | Hormone needed for sleep, darkness triggers the release from Pineal gland, levels are higher at night |
| What is cortisol? | Horome to make you feel alert, higher in the morning but it can be released when we are stressed. |
| What is stage 1 of sleep? | Light sleep, muscles start to relax. Last few mintues, muscles twitches, alpha and theta waves. |
| What is stage 2 of sleep? | Sleep sindles on EGG, suddent burts of nuerol activity. NREM sleep, memory consolidation. Body temp drop, heart rate drop, ready for deep sleep |
| What is stage 3 of sleep? | Deep sleep stage, harder to you up. Delta waves, slowest brain wave between 05 hz and 4hz. |
| What is stage 4 of sleep? | Deepest stage, still delta waves, hard to wake up |
| What is stage 5 of sleep? | REM, deaming. Movement inhibitation, complete prarlysis of body. |
| Strength of sleep-cycle explanation? | Real life application, importance of melotin leads to melotonin supplements. |
| Strenght of sleep-cycle explanation? | Supported by research from animales the SCN. Siffre supports the exogenous zeitgabers importance. |
| Weakness of sleep-cycle explanation? | Low generaliabilty with animals like hamsters. biologically different. |
| Weakness of sleep-cycle explanation? | Siffre done in unnatural environemnts, usedes artifical light. |
| What was the animal research of the SCN? | ahmster removed SCN, to isolate to see cuase and effect. Hamseter random sleep-wake cycle an normal when SCN is put back in. |
