Exam 5: Sensation and Perception
During audition, sound vibrations are encoded as neural signals in the basilar membrane of the cochlea.
True
Describe two ways in which the auditory system of the barn owl computes auditory spatial information.
The auditory system of the barn owl computes auditory spatial information through two main mechanisms: interaural time differences (ITD) and interaural level differences (ILD).
1. Interaural time differences (ITD): The barn owl's auditory system processes the tiny differences in the time it takes for a sound to reach each ear. This information is used to determine the horizontal angle of the sound source relative to the owl. The owl's brain is able to compute these time differences with remarkable precision, allowing it to accurately locate and track prey even in complete darkness.
2. Interaural level differences (ILD): The barn owl also utilizes the differences in sound intensity between the two ears to compute auditory spatial information. By comparing the relative loudness of a sound in each ear, the owl is able to determine the vertical angle of a sound source. This helps the owl to accurately pinpoint the elevation of its prey, allowing for precise targeting during hunting.
Overall, the auditory system of the barn owl is highly specialized for computing auditory spatial information, allowing it to locate and capture prey with incredible accuracy.
Simple cells in the primary visual cortex selectively respond to visual stimuli based on
C
How do receptive fields change as you proceed up the visual pathway starting at the LGN)? Include an example of a stimulus that would, and would not, cause a neural response for a hypothetical cell at each stage.
Different parts of the body are represented in the primary somatosensory cortex in proportion to their size.
Which of the following is NOT a type of corpuscle used for somatosensation?
Give several reasons why the following statement is incorrect: "The right visual field is processed by the left hemisphere of the brain, while the left visual field is processed by the right."
Speculate about what kinds of information might be processed in the superior temporal lobe of a congenitally deaf person. In your answer, consider the kinds of environmental information that are especially important in the absence of sound.
Neurons in the olfactory bulb demonstrate an extensive amount of convergence and divergence. This means that neurons in this system
A patient has an injury to the optic nerves, such that the branches of each optic nerve that normally cross to the opposite side of the brain at the optic chiasm are severed. The remaining branches, which do not cross to the other side of the brain, are intact. Which of the following best describes the effect of this injury on his vision?
Why is it difficult to investigate the conscious experience of perception using monkeys?
Of the following choices, the strongest evidence for a link between the sense of smell and the triggering of memories is the observation that
The senses of olfaction and gustation are known as chemical senses because they begin with stimulation by chemicals odorants or tastants).
In the auditory system, the conversion of sound waves into action potentials occurs in the
Unlike the visual system, auditory information does not pass through the thalamus on the way to the cortex.
The finding that V1, but not V2 or V3, has an fMRI "fingerprint" for a presented but not perceived orientation suggests that
Argue that activity in higher visual areas is more closely linked to the percept we experience than are early visual areas, using experimental findings to support your argument.
A scotoma that involves one entire side of the visual field is called a
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