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    i can help with summary notes for Biological Rhythms, Relationships and Eating Behaviors if anyone wants it?

    By summary i mean outlining main points and a few supporting studies

    anyway just request
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    Lol if you do biology psychology and computing then i shall come to you for advice in june :yep:
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    PM me the notes if you can, if you did these papers in June do you remember what came up for Relationships and Rhythms?
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    as I said earlier, notes on biological rhythms would be amazing if possible...I'm in one those states where I have so much wrk I just don't know where to start
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    If you could tell me the main things to revise for Relationships and Eating Behaviour I would be forever in ur debt!
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    (Original post by az1992)
    i can help with summary notes for Biological Rhythms, Relationships and Eating Behaviors if anyone wants it?

    By summary i mean outlining main points and a few supporting studies

    anyway just request
    I'm doing the exact same Topics *scared* Anyways good luck everyone
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    (Original post by sirtechno)
    If you could tell me the main things to revise for Relationships and Eating Behaviour I would be forever in ur debt!
    Stages of Sleep
    The sleep cycle, an ultradian rhythm. Stages of Non Rapid Eye Movement (NREM) Sleep as defined by Dement and Kleitman (1953):
    Stage 1:
    -Brain waves slow from alpha waves to theta waves.
    -heart rate slows and muscles relax
    -Stage similar to that of deep relaxation
    -Aka Hypnogic Stage easy to wake up from
    -Lasts approx. 15 minutes

    Stage 2:
    -theta waves get slower and larger due to sleep spindles
    -Sleep spindles (aka k-complexes) stimuli that is not enough to wake us, ie the wind from oustide your window.
    -heart rate and temperature fall
    -lasts about 20 minutes

    Stage 3:
    -further falls from heart rate
    -brain waves slow from theta waves into delta waves
    -stage lasts 15 minutes

    Stage 4:
    -Deepest sleep
    -growth hormones secreted and metabolic rate is slowest
    -wake up only possible if it is a noise significant to you ie someone shouting fire or your baby crying
    -brainwaves at the slowest
    -lasts for between 30-40 minutes

    Rapid Eye Movement Sleep (REM)
    - brain waves more complex, faster
    -glucose and oxygen demands increase
    -eyes move under eyelids, it is difficult to wake
    -speed of heart and lungs increases
    -Action of Reticular Activating System (RAS) prevents movement of muscles
    -lasts 15 minutes but increases as night goes on
    Routine:
    After going through stages 1 to 4, we quickly go back up to stage 2 and REM sleep replaces stage 1. we then repeat the stages around 6 times with less time being spent in stage 4 until the end of sleep when stage 4 is missed altogether.
    The brain waves are measured by an Encephalogram (EEG) which has electrodes positioned at various parts around the head.



    Sleep Disorders
    Narcolepsy: General Bouts of sleepiness during the day.
    -suggested that it is genetic, affects 1 in 1000 people (Aldrich 1993)
    The Four general symptons of Narcolepsy were outlined by Mahowold and Schenk (1992). Sufferes of Narcolepsy may not suffer from all the symptoms. The Four symptoms are as follows:
    -Extreme bouts of sleepiness, either gradual or immediate
    -Cataplexy, Collapse due to loss of skeletal muscle tone.
    -Sleep Paralysis, the inabillity to move after waking.
    -Hypnogic Hallucinations, dreamlike visions that are hard to distingish from reality
    Cause?
    neurons in the medulla (located in brainstem) that are active during REM sleep are also active during bouts of Cataplexy. These same neurons are also responsible for sending messages to the spinal cord to surpress skelatal muscles during REM sleep. Hence this is what causes the collapse.
    Lin et al (1999) identified mutant gene in dogs that affected receptor which was found to affect brain cells called hypocretin, a chemical involved in sleep regulation.

    Sleep Walking aka somnambulism = state in which a sleeping individual walks around as if awake.
    -known to be genetic and is more common in childhood.
    -condition most likely to occur in sleep stages 3 and 4 in the 1st half of the night
    -despite popular belief, sleep walking is rarely, and not in this case, a result of acting out dream

    REM Behavioural Disorder
    -REM Behavioural Disorder (RBD) IS when a dream is acted out.
    -Disorder is very rare and associated usually with those 50+
    - behaviour is very organised, ie eating or imaginary fighting (Mahowald and Schenck 2002)
    -disorder is rare because individual is usually paralysed during REM sleep.
    RBD is known to be common amongst sufferers of Parkinsons which suggests that the disorder is caused by the degeneration of motor responces
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    (Original post by sirtechno)
    If you could tell me the main things to revise for Relationships and Eating Behaviour I would be forever in ur debt!
    relationships

    reinforcement affect theory or reward/need and satisfaction theory
    Equity theory
    Stages of breakup (Rollie and Duck or just Duck depending what revision book your using.

    parental Investment Theory (Trivers 1972)
    Buss 1989 (Mate Preference)

    Hofstede 1980
    Haven and Shaver 1989

    Eating Behaviors


    Religious effects on eating beahvior (doesnt need studies)
    Stress (Individual Differences Model, greeno and Wing 1994)
    Dieting Success (Ogden and Hall 2008)
    Dieting Failure (Polivy and Herman 1975)

    Neural Mechanisms (lateral Nucleus, Ventromedual nucleus)
    Baylis et al 1996, Win et al 1990
    Evolutionary explanations, sweet equals energy, bitter equals poison (Desor et al 1973, Geldard 1972)

    Bullima Nervosa, (Biological causes Kissileff 1996/Kendler 1991)
    Psychodynamic causes (Wonderlich et al 1996,sexual abuse) Halmi 1995
    Social Learning Theory (Hamilton and May 1993 and Rodin 1991)
 
 
 
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