SENSATION AND PERCEPTION
BASIC CONCEPTS OF SENSATION AND PERCEPTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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how we process red, green, and blue light; why we experience color afterimages
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how we perceive low-pitched sounds; how we perceive high-pitched sounds
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how touch sensations involve more than tactile stimulation; why stroking a pressure spot leads to the sensation of a tickle
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how phantom limb sensations occur; how stimulation of the larger fibers in the spinal cord stop pain
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Detailed explanation-1: -The place theory of pitch perception suggests that different portions of the basilar membrane are sensitive to sounds of different frequencies. More specifically, the base of the basilar membrane responds best to high frequencies and the tip of the basilar membrane responds best to low frequencies.
Detailed explanation-2: -Place theory best explains how we sense high pitches, frequency theory best explains how we sense low pitches, and some combination of the two seems to handle the pitches in the intermediate range.
Detailed explanation-3: -Frequency theory: The rate of nerve impulses traveling up the auditory nerve matches the frequency of a tone; enabling us to sense its pitch. Best explains how we sense low pitches.
Detailed explanation-4: -Place theory states that the location on the basilar membrane activated during sound sensation corresponds to the pitch of the sound perceived. Frequency theory states that the speed at which the neural impulse travels through the auditory nerve corresponds to the pitch.
Detailed explanation-5: -Low-frequency sounds are perceived as lower pitch due to activation of cilia deep in the cochlea, whereas high-frequency sounds are higher pitched and processed closer to the base of the cochlea.