Psychology 1000 Lecture Notes - Lecture 6: Jet Lag, Pineal Gland, Melanopsin
13 May 2018
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Department
Course
Professor
Attention
• Autonomic processing
• behaviour is well learned
• it is not in awareness
• ex. driving in a car for a while you don't think about it you just do it
• Controlled processing
• behaviour poorly learned
• you have to be aware of whats going on
• in our conscious awareness
• we control them
• the stoop effect
• certain things are automatic and we are not away of them
• reading the word green even if it is coloured in red. you then are slower at answering
what colour it is
Daily Rhythms/Circadian Rhythms
• daily cycles
• blood pressure
• body temp
• chemical concentrations
• 25 hour clock
• mental activities peak at morning hours
• peak levels in late afternoon (best time for physical tasks)
• under control of the superchiasmatic nucleus
• internal timing mechanism in the hypothalamus
• daylight stimulates the SCN which inhibits production of melatonin in the pineal gland
• photosensitive ganglion cells contain Melanopsin which breaks down blue light
• darkness removes the inhibition resulting in more melatonin therefore we feel tired
• Disturbances
• jet lag and shift work
• phases advance more difficult than phase delay
• ex. flying to Vancouver to Halifax is more problematic than eats to west
• some people take melatonin supplements
• more effective for delay
• probably works for relieving daytime fatigue
• Avoiding Jetlag
• hydrate on plane
• avoid alcohol
• get up and stretch
• light meals
• expose self to sunlight upon arrival
Consciousness
• awareness of the relationship between self and the external world
• monitoring - keeping track of myself
• control - plan for behaviour or adjust behaviour in various situations
• consciousness includes monitoring and control
• precocious level
• info not currently available but could be
• what does your parents house look like
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•tip of the tongue
• trying to remember something that is right there and you have aspects of it
• eventually you'll achieve it but rn you can't
• accessible information
• subconscious level
• inform not acceslbie but may leak out fro time to time cause we cant control it
• freud - a happy person never fantasizes only an unhappy one does
• most of us day dream every 90 minutes
• we day dream about…
1. failure or success
2. aggression
3. sex or romance
4. guilt
5. problem solving
• Why day dream?
• safety valve
• escape form life or consciousness
• alters mood in a positive direction
• low risk way to deal with problems… by imagining reality
• increase arousal
Sleep
• #1 circadian rhythm we engage in
• stages of sleep
• during sleep our body begins to shut down
• heart rate lowered
• respiration loerend
• minimum of muscle activity
• temperature drops
• marked decrease in sensitivity to external stimulation
• EEG recording
• record brain waves
• while awake but drifting off you have alpha patterns (10cps)
• while awake you have a beta pattern (40cps)
• while sleeping there are stages
• stage 1: theta waves (6cps)
• Stage 2: K complex - follows the sleep spindle (1-2 cps) &
decrease in brain activity. Seen in restless leg syndrome and
epilepsy
• sleep spindle - fast waves (12-16 cycles cps)
• Stage 3: delta waves (1cps)
• stage 4: Delta waves
• You cycle back up again after hitting stage 4
• Stage 1 for the second time you hit REM
• typically over 8 hour night you have 4 - 5 periods of REM
• harder for you to process things going on around you while sleeping
• why do we sleep
• restorative function
• sleep deprivation leads to attention lapse and irritable
• evolutionary benefit
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find more resources at oneclass.com
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