Please enable JavaScript.

Coggle requires JavaScript to display documents.

WAKEFULNESS & SLEEP - Coggle Diagram

- - - - frequency of eating & drinking
      - body temperature
      - secretion of hormones
      - urination
      - sensitivity to drugs
- - - - stimulus that resets circadian rhythm
  - - - main control center of circadian rhythm of sleep & temperature
      - damage: less consistent body rhythms, no longer synchronised to environmental patterns
      - regulates pineal gland (endocrine gland)
        
        secretes melatonin
    - - two types of genes responsible for generating circadian rhythm
        
        period (PER proteins)
        
        PER & TIM proteins increase activity of certain SCN neurons that regulate sleep & waking
        
        mutations in PER genes: odd circadian rhythms/decreased alertness
        
        timeless (TIM proteins)
    - - pineal gland
        
        secretes melatonin
      - melatonin
        
        hormone that increases sleepiness
        
        secretion begins 2-3 hours before bedtime
        
        can be used as sleep aid
- - - - coma
        
        low brain activity, little response to stimuli
      - vegetative state
        
        alternates between periods of sleep to moderate arousal, no awareness of surrounding
      - minimally conscious state
        
        limited speech comprehension
      - brain death
        
        no brain activity, no response to any stimulus
- - - - slowing of heart rate, breathing rate & brain activity
- - - - pons (triggers onset of REM sleep)
      - limbic system (emotional system)
      - parietal cortex
      - temporal cortex
    - - primary visual cortex
      - motor cortex
      - dorsolateral prefrontal cortex
  - - - distinct patterns of high-amplitude electrical potentials
- - - - dreams begin with spontaneous activity in pons, activates cortex
      - cortex synthesises a story from pattern of activation
    - - suggests dreams are similar to thinking
  - - - account for visual imagery of dreams