Q U I Z # 5

1. If a series of lights flash in succession at a certain rate it creates the illusion of motion. This example of apparent motion is called
a) induced flow movement
b) motion aftereffect
c) stroboscopic movement
d) random motion inference

2. Cortical neurons of the V5 area respond best to
a) moving stimuli regardless of color or shape
b) three dimensional objects or pictures of them
c) large objects in motion
d) moving horizontal or vertical bars

3. A patient who seems to have lost the ability to see motion is referred to as having
a) spatio-temporal agnosia           c) general visual agnosia
b) akinetopsia                              d) prosopagnosia

4. The possible opponent-process relationship between
motion-detecting cells could best explain
a) the stroboscopic motion effect
b) some forms of motion agnosia
c) motion aftereffects like the waterfall illusion
d) the Wertheimer apparent motion effect

5. Barlow and Hill (1963) found cells in the rabbit retina whose firing rate __________, but made no response to a moving stimulus in its null direction; this provides a possible physiological basis for
a) dropped below the resting rate after its preferred stimulus was turned off, waterfall illusions
b) steadily increased firing after prolonged exposure to its preferred stimulus, stroboscopic motion
c) did not change after its preferred stimulus was turned off, apparent motion

6. A subject is shown a pattern composed of two gratings. One grating is moving to the right, the other is moving vertically. The subject reports seeing a plaid-like pattern moving to the upper-right. What of the following is probably not occurring in the subject's brain?
a) component cells which respond to rightward motion are firing
b) pattern cells which respond to upper-right motion are firing
c) component cells which respond to upper-right motion are firing

7. Component cells are found in _________, while pattern cells are found in ___________.
a) V1 and MT, MT only
b) V1 only, MT only
c) V1 only, V1 and MT

8. The comparator is a hypothetical structure proposed in corollary discharge theory that
a) decides which cortical cells are firing the most
b) receives retinal sensory signals and a copy of the motor signal from the brain
c) conducts a summation function on neural circuit output
d) re-routes incoming visual information to the motor system for action

9. Which one of the following physical/perceptual relationships of sound are not correct?
a) amplitude / loudness
b) complexity / timbre
c) frequency / loudness

10. The stapes is the tiny ear bone connected to the _____________ of the cochlea.
a) round window c) oval window
b) tonotopic membrane d) scala media

Q U I Z  6

1. Which of the following best represents the correct flow of neural information after it leaves the cochlea?
a) inferior colliculus; superior olive, cochlear nuclei, medial geniculate nucleus, auditory cortex
b) superior olive, medial geniculate nucleus, cochlear nuclei, inferior colliculus, auditory cortex
c) cochlear nuclei, superior olive, medial geniculate nucleus, inferior colliculus, auditory cortex
d) cochlear nuclei, superior olive, inferior colliculus, medial geniculate nucleus, auditory cortex

2. Georg von Békésy used cadavers and models to study
a) the action of the hair cells in response to sound
b) the vibration of the basilar membrane to different frequencies
c) the acoustic properties of the ear canal
d) how Baron von Frankenstein animated dead bodies

3. Traveling from the base of the cochlea to the apex, we find that the best frequency response
a) goes from high frequencies to low frequencies
b) goes from low frequencies to high frequencies
c) is arranged in a columnar fashion
d) is between 3,000 and 30,000 Hz

4. The primary auditory cortex (A1) is located in the
a) temporal lobe        c) cochlear nucleus
b) occipital lobe         d) parietal lobe

5. The pattern of maximum displacement of the basilar membrane at a certain point due to a particular frequency is called
a) Bekesy's constant
b) the envelope of the traveling wave
c) the waveform of best fit
d) the Mossbauer wave front

6. The auditory response area is
a) the area above the U-shaped function up to the threshold of feeling
b) has a range of sensitivity of about 400-3000 Hz
c) a plot of the minimum SPL needed to detect a tone as a function of frequency
d) plot of the number of decibels by frequency that create the same perception of loudness

7. The "Loudness" button on your stereo functions to
a) boost the intensity of the midrange frequencies in the music when played at high volume
b) boost the intensity of the low and high frequencies in the music when played at low volume
c) increase the intensity of midrange frequencies in the music at low volumes
d) increase the intensity of all frequencies in the music at either high or low volumes

8. Which animal below may have color vision that is based on more than 3 different photopigments?
a) goldfish
b) pigeons
c) primates
d) none of the above, no organism has been found with more than 3

9. In some animals that forage or hunt at night, the eye has a surface which reflects incoming light back on to the retina and improves vision in low light conditions; this is called the
a) ommatidium
b) compound lens
c) tapetum

10. Most predators have _________ eyes which allow for better ______________.
a) lateral; panoramic fields of view
b) lateral; depth perception
c) frontal; depth perception
d) frontal; panoramic fields of view