The Senses

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Author:
mking_nu
ID:
80524
Filename:
The Senses
Updated:
2011-04-18 21:32:03
Tags:
Psych
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Description:
Psychology- senses
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  1. receptors in the eyes which see differences in light and dark as well as angles

    they are more numerous
    rods
  2. receptors in the yeses which perceive color

    red, blue, and green sensitive receptors in the retina
    cones
  3. combination of red/green, blue/yellow and luminance channels allows for color perception
    2nd stage visual processing
  4. the amplitude of sound waves
    loudness
  5. the frequency of sound waves

    the auditory complex is organized tonotopically
    pitch
  6. this depends on the timing of sound at each ear
    location
  7. haptic
    touch
  8. depends on the density of mechanoreceptors (touch receptors)

    the somatosensory cortex organizes somatotopically- body mapping- most sensitive
    pressure
  9. indpendent warm and cool thermoreceptors

    more warm than hot
    temperature
  10. the type of pain that is sharp, immediate pain- causes a reflexive withdrawal
    fast
  11. type of pain based on chemical signs of dmage, stopping the body part
    slow
  12. competing sensory input can reduce pain

    ex: rubbings something that hurts
    gate control theory
  13. sweet, salty, bitter, sour and umami
    taste
  14. sense that bypasses the thallamus

    it evokes emotion and memory
    pheremones not consciously smelled by humans

    can communicate threat, emotion, sexual signals
    smell
  15. loss of smell which reduces interest in sex and food
    anosmia
  16. sleep walking
    sumnambulism
  17. sleep allows the brain and body to rest and repair
    restorative theory
  18. falling asleep in the day for a few minutes or seconds
    microsleeps
  19. regulation of biological patters in regular cycles

    biological clock work controlled by light and dark--> developed to keep us safe during most dangerous times of day (quiet)
    circadian rhythms
  20. sleep is time when circuits wired in the day are strengthened
    facilitation of learning theory
  21. gland that secretes melatonin--> darkness triggers its release
    pineal gland
  22. plot of dream
    manifest content
  23. what a dream symbolizes
    latent content
  24. neural stimulation from the pons activates mechanisms that normally interpret visual input
    activation sythesis hypothesis
  25. our psychological experiences of phsycial stimuli

    how much energy is needed to sense?
    psychophysics
  26. absolute minimum amount of intensity of stimuli that must occur before you experience the sensation

    ex: hearing- the softest sound you can hear 50% of the time
    absolute threshold
  27. the minimum amount of change require for you to notice the difference in sense stimulus

    the threshold increases as the stimulus grows in intensity
    difference threshold
  28. threshold based on proportion of original rather than size of difference
    Weber's Law
  29. perception of the faintest stimuli requires a judgement about its presence or absence
    signal detection theory
  30. a decrease in sensitivity to a constant level of stimulation
    sensory adaptation
  31. the region of visual space to which neurons in the primary visual cortex are sensitive
    receptive field
  32. "shape, form, organized whole"

    our brains use innate principles to organize sensory information
    Gestalt

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