Final Exam

Card Set Information

Final Exam
2012-11-30 13:01:55
CMDS 4600

Show Answers:

  1. A bundle of fibers that uses chemical and electrical signals to transmit sensory and motor information from one body part to another.
  2.  sends signals to the brain (afferent) and also sends signals from the brain back out to the cochlea (efferent).
    The auditory portion of the auditory-vestibular nerve (VIIIth nerve)
  3. Auditory nerve fiber signals stimulate cells in a structure called the brainstem, specifically in a structure the brainstem 
    cochlear nucleus
  4. Cells in the cochlear nucleus then send signals to other structures in the brain; important in our ability to localize sound in space because they allow comparison of information coming in from the two ears.
    superior olives 
  5. Differences in the time of arrival of a sound to the two ears 
    interaural time differences (ITDs)
  6. Differences in the magnitude of the sound to the two ears 
    interaural level differences (ILDs).
  7. Both ___________________ and __________________ can be used by the brain to localize sound along the horizontal plane.
    interaural time differences and interaural level differences
  8. The smallest separation between two sequential sounds that can be detected
    minimum audible angle
  9. In order for us to determine ________ position, we can actually take advantage of the different ways sounds strike the pinna.
  10. The superior olives send signals along a pathway called the ____________________ to another structure further “upstream” called the ______________.
    lateral lemniscus; inferior colliculus
  11. The neurons in the inferior colliculus send signals onward to the _____________________________. 
    medial geniculate nucleus (MGN).
  12. The cells in the medial geniculate nucleus send signals to specific areas on the surface of the brain (the cortex) called ________________ .
    auditory cortex
  13. The different frequencies of sound are represented in different parts of the auditory cortex; the systematic organization within an auditory structure on the basis of characteristic frequency
  14. Continued intense exposure to sound produces changes in the responsiveness of the auditory system. One effect can be that the system is temporarily or permanently less sensitive to sound. If this effect is temporary, it is called a _________________________. If this effect is permanent, it is called a _________________________.
    temporary threshold shift (TTS); permanent threshold shift (PTS)
  15. our ability to detect changes over time such as gaps between stimuli (gap detection) or changes in intensity over time.
    Temporal Resolution
  16. refers to hearing with two ears
    binaural hearing
  17. refers to detection of sound with only one ear. 
    Monaural hearing 
  18. When the sound to the two ears is identical, it is called __________. 
  19. When the sound to the two ears is different. it is called ________.