SENSATION AND PERCEPTION
HEARING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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fluid-filled tube that provides a sense of body movement.
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specific area of the auditory cortex.
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fluid-filled tube that provides a sense of upright body position.
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fluid-filled tube in which sound waves trigger nerve impulses.
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Detailed explanation-1: -The inner ear contains a group of interconnected, fluid-filled chambers. The snail-shaped chamber, called the cochlea (KOK-lee-uh), plays a role in hearing. Sound vibrations from the bones of the middle ear are transferred to the fluids of the cochlea.
Detailed explanation-2: -Three extracellular fluids have been identified in the cochlea: endolymph, perilymph and intrastrial fluid (Table 1; Wangemann & Schacht, 1996). Endolymph fills scala media of the cochlea (Fig. 1). Intrastrial fluid fills the small extracellular spaces within stria vascularis.
Detailed explanation-3: -The cochlea is filled with a fluid that moves in response to the vibrations from the oval window. As the fluid moves, 25, 000 nerve endings are set into motion. These nerve endings transform the vibrations into electrical impulses that then travel along the eighth cranial nerve (auditory nerve) to the brain.
Detailed explanation-4: -The vestibular receptors lie in the inner ear next to the auditory cochlea. They detect rotational motion (head turns), linear motion (translations), and tilts of the head relative to gravity and transduce these motions into neural signals that can be sent to the brain.
Detailed explanation-5: -The cochlear tube is formed by three membranous and fluid-filled canals, which are the scala vestibuli (SV most superior and connected with the vestibule), scala media (SM), and scala tympani (ST most inferior and ends at the secondary tympanic membrane and the round window) forming a two-and-a-half spiral structure.