Mindmap

Chapter 5: Variations in Consciousness

Andrew Cooper Englisch

Inhalt der Mindmap

Sleep
- Stages of Sleep
  - Stages 1-4 are NREM stage 5 is REM
  - Stage 1
    - Stage 1 is a brief transitional phase, Usually lasts 1-7 minutes.  Alpha and Theta waves observed by EEG
    - Stage 2
      - Stage 2 lasts 10-25 minutes and is dominated by bursts of high frequency brain waves known as Sleep spindles. 
      - Stage 3+4
        Stages 3+4 are called slow-wave sleep during which high amplitude and low frequency delta waves dominate EEG recordings
        Stage 5 REM
        Once the sleeper surpasses stage 4 and should return to stage 1 they transition into a stage 5: REM sleep.  It is characterized by deep sleep and Rapid Eye Movement.  
        Vivid Dreams
        Vivid dreams and nightmares 
        Night Terrors
        Abrupt awakenings from NREM accompanied by intense autonomic arousal and feelings of panic. 
        Sleepwalking/talking
        Found in stage 3, see Somnambulism in Sleep disorders for more info. 
      - Sleep Spindles
        A sleep spindle is a burst of oscillatory brain activity visible on an EEG that occurs during stage 2 sleep.
    - Hypnotic Jerks
      - Feeling of actually falling
  - Measured by EEG
    - An electroencephalogram (EEG) is a test that detects electrical activity in your brain using small, flat metal discs (electrodes) attached to your scalp.
- Dreams
  - Freud
    - Believe dreams are a form of wish fulfillment 
  - Cartwright
    - Mental Housekeeping Theory: Believes dreams are a creative way of problem solving for the real world. 
  - Hobson + Mccarley
    - Activation-Synthesis Model, proposes dreams are a side effect of the neural activation that produces waking-like brain waves during REM sleep. 
- Sleep Disorders
  - Narcolepsy
    - Falling asleep uncontrollably. 
  - Insomnia
    - Difficulty falling and staying asleep. Caused by an array of symptoms: anxiety, tension, emotional problems, depression, stress, pressure, pain, ulcers, asthma, drugs (specifically stimulants).  Most common treatment are sedatives which come in two classes: benzodiazepene and nonbenzodiazepene. 
  - Apnea
    - Snoring. 
  - Somnambulism
    - Sleepwalking.
  - RBD
    - REM sleep behavior disorder marked by troublesome dream enactments during REM periods.
- Deprivation
  - Sleep Restriction
    - Occurs when people make do with substantially less sleep than normal over a period of time. 
  - Selective Deprevation
    - Deprived of REM sleep, can only last for 2-4 days completely deprived 
Drugs
- Narcotics
  - Drugs derived from opiates capable of relieving pain.    High physical dependence High Psychological dependence 
- Sedatives
  - Sleep inducing drugs that tend to decrease Central Nervous System activation and behavioral activity. High Physical dependance High psychological dependence
- Stimulants
  - Drugs that tend to increase Central Nervous System activation and behavioral activity.  Moderate Physical dependence High psychological dependence 
- Hallucinogens
  - A diverse group of drugs that have powerful effects on mental and emotional functioning, marked most prominently by distortions in sensory and perceptual experience.  No physical dependence  low psychological dependence 
- Cannabis
  - A hemp plant from which marijuana, hashish, and THC are derived. No physical dependence  low to moderate psychological dependence.  
- Alcohol
  - a variety beverage containing ethyl alcohol.  Moderate Physical dependence  moderate psychological dependence
- MDMA
  - A compound drug related to both amphetamines and hallucinogens, especially mescaline.  Similair physical and psychological dependences to hallucinogens. 
- Tolerance Vs Dependence
  - Tolerance is the ability or willingness to tolerate something, in particular the existence of opinions or behavior that one does not necessarily agree with. Dependence is the addiction to a drug. 
  - Physical
    - When a person must continue to take a drug to avoid withdrawal.
  - Psychological
    - When a person must continue to take a drug to satisfy intense mental and emotional cravings. 
Hypnosis
- Systematic procedure that increases suggestibility. 
- Susceptibility.
  - Hypnotic susceptibility measures how easily a person can be hypnotized. varies between individuals. Linked to higher levels of absorbtion in tasks. 
  - Stanford Hypnotic susceptibility scale
    - A scale developed to measure the susceptibility of an individual to hypnotism.  
- Effects
  - Anesthesia
    - Anesthesia is a way to control pain during a surgery or procedure by using medicine called anesthetics. It can help control your breathing, blood pressure, blood flow, and heart rate and rhythm.
  - Dis-inhibition
    - Dis-inhibition is a lack of restraint manifested in disregard for social conventions, impulsivity, and poor risk assessment.
  - Hallucinations
    - An experience involving the apparent perception of something not present.
  - Post-hypnotic suggestion
    - A suggestion made to a hypnotized person that specifies an action to be performed after awakening, often in response to a cue.
  - Post-Hypnotic Amnesia
    - Post-hypnotic amnesia is the inability in hypnotic subjects to recall events that took place while under hypnosis.
- Theories
  - Social Cognitive Theory
    - Social cognitive theory (SCT) holds that portions of an individual's knowledge acquisition can be directly related to observing others within the context of social interactions, experiences, and outside media influences. 
  - Hypnotic Trance vs Role Playing
    - One theory is that hypnosis puts subjects into a deep trance, however due to EEG activity there is no evidence of these claims which has led many to believe that hypnosis is just elaborate role playing.
  - Dissociation
    - A splitting of the mental processes into two streams of consciousness. 
Meditation
- Practices that train attention to heighten awareness and bring mental processes under greater voluntary control.  
- Benefits
  - Decreased heart respiration rate
  - lower blood pressure
  - Managing stress
  - Cardio-vascular benefits
  - Grey Matter Increase
  - Mindfulness Mediation
  - Immune system boost
- Origins
  - An ancient discipline originally rooted in yoga, zen, and transcendental meditation.