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  1. Amplitude
    Amplitude of a sound wave is its intensity
  2. Loudness
    Sensation related to amplitude but not identical to it
  3. Frequency
    Number of compressions per second, Hz per second
  4. Pitch
    • Related aspect of perception
    • Higher frequency sounds are higher in pitch
  5. Pinna
    Outer ear
  6. Tympanic Membrane
    • Eardrum
    • Vibrates at same frequency as the sound waves thats strike it
    • Connects to inner ear bones
  7. Oval window
    Membrane of the inner ear
  8. Cochlea
    Snail-shaped structure that holds the scala vesibuli, scala media, scala tympani
  9. Place theory
    Each frequency activates hair cells at one place lalong the basilar membrane
  10. Frequency theory
    Basilar membrane vibrates in synchrony with a sound, causing auditory nerve axons to produce action potentials at the same frequency
  11. Volley Principle
    Auditory nerve as a whole produces volleys of impulses for sounds up to avout 4,000 per second even though no individual axon approaches that frequency
  12. Somatosensory System
    • Sensation of the body and its movements is not one sense but many, including discriminative touch (which identifies the shape of an object)
    • Deep pressue, cold, warmth, pain, itch, tickle..
  13. Pacinian corpuscle
    Detects sudden displacements or high frequency vibrations on the skin
  14. Dermatome
    Each spinal nerve innervates or connects to a limited area of the body
  15. Capsaicin
    • Chemical found in hot peppers
    • stimulates pain receptors and responds to acids and heat
  16. Substance P
    Dectects increases in intensity
  17. Opiod Mechanisms
    • Systems that responds to opiate drugs and similar chemicals
    • They bind to receptors in the spinal cord
    • Bind to periaqueductal gray area in the midbrain
    • Act by blocking the release of substance P
  18. Endorphins
    Transmiters that attach to the same receptors as morphine
  19. Labeled-Line principle
    Each receptor would respond to a limited range of stimuli, and the meaning would depend entirely on which neurons are active
  20. Adaptation
    Reflects the fatigue of receptors sensitive to sour tastes
  21. Cross-adaptation
    Reduced response to one taste after exposure to another
  22. Supertasters
    Have the highest sensitivity to all tastes and mouth senesations
  23. Olfaction
    Sense of smell
  24. Olfactory cell
    • Responsible for smell
    • Line olfactory epithelium
  25. Synesthesia
    Experiecne of one sense in response to stimulation of a different sense
Card Set:
2011-10-17 01:14:26
Other Sensory Systems

Audition, Mechanical Senses, The Chemical Senses
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