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The encoding of __________is thought to be mediated by delay lines in the superior olive.
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sound location in the horizontal plane |
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sound intensity |
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pitch |
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sound location in the vertical plane |
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- Occupational Hearing Loss Frequent exposure to loud noise of a particular pitch can cause loss of hair cells in the part of the cochlea that responds to that pitch. People who work with or around noisy machinery are at risk for such frequency-specific hearing loss. Taking precautions such as using ear plugs to reduce sound exposure is important. Noise-induced hearing loss can be prevented, but once it occurs it is irreversible because dead or damaged hair cells are not replaced. FIGURE 33.24 shows the threshold decibel levels at which sounds of different frequencies can be detected by an average 25-year-old carpenter, a 50-year-old carpenter, and a 50-year-old who has not been exposed to on-the-job noise. Sound frequencies are given in hertz (cycles per second), The more cycles per second, the higher the pitch. FIGURE 33.24 Effects of age aria occupational noise exposure. The graph shows the threshold hearing capacities fin decibels) for sounds of different frequencies (given in hertz) in a 25-year-okj carpenter (blue). a 50-year-old carpenter (red), arid a 50-year-ofd who did not have any on-the-job noise exposure (brown). 1. Which sound frequency was most easily detected by all three people?Head movements are detected primarily in the semicircular canals and gravity by the otolith organs. T or F?Describe how the anatomy of the cochlear auditory pathway enables normal auditory sensorineural physiology. BIU = = H 19: = = = 1 3 HT >
- IIber. The pressure wave is dissipated by the stretching of B-Characteristics of Equilibrium and Hearing reviewing the structures for hearing and equilibrium, place the structure or description into the correct bin. ew Available Hint(s) Reset H When traveling in an elevator, you can sense when the elevator is moving Pressure waves in perilymph and endolymph Sensing the movement when you spin while sitting in a swivel chair with your eyes closed Maculae Crista Otoliths Vibrations of tympanic membrane Ampulla Dynamic equilibrium Static equilibrium HearingSense of smell is also known asAll sensory organs convert energy in the environment into action potentials in the nervous systern. Explain the process of how our ears convert energy in the form of sound waves in the air into action potentials along a nerve. Include the appropriate order of structures and regions of the ear as well as the physiological process of creating action potentials and interpreting them in the brain.
- Taste receptors in the toungue are ipsilateral to the side of the gustatory cortex on which their input is processed. True FalseSituation: Noise at Work Ediberto is 18 years old, and has been working for a company that manufactures prefabricated homes for about a year. He spends a lot of the work day using a power saw. His ears usually ring for a while in the evening, but it seems to clear up by the morning. He is a little worried about whether it’s damaging his hearing, but it’s not that different than how his ears feel after a rock concert. He wants to find some information on how much noise is bad for you, and what he can do. Questions for following story. 1. What went right in this situation? 2. What went wrong in this situation? 3. What steps should be taken in this workplace to make sure employees are better protected and prepared the next time?One of the mechanisms that the auditory system uses to localize sound is referred to as interaural time difference (ITD). Where in the brain does this takes place and explain how this mechanism would enable you to localize a sound coming from your left side.
- Susan exhibits a gurgly voice quality after eating a meal, suggestive of bolus residue on the surface of her vocal folds. Identify which sensory nerve must be impaired in the absence of the respiratory protective response of coughing with laryngeal penetration of a bolus and laryngeal vestibule residue.The maculae of the utricle and saccule with their embedded otoliths and the semicircular canals _______. dectect changes in the rate at which the head is moving amplify soft sounds to improve hearing can only detect motion if the head moves at a constant velocityThe apical microvilli of a gustatory cell are called _____.
