Chapter 3 Quiz

. Which of the following is true of the human visual system?

Our visual systems process the full electromagnetic spectrum.

Photons are the neural activity generated by light.

Visual processing occurs for wavelengths between 400 and 700 nanometers.

Light in our nervous systems is defined by the physical parameters of photons.

Visual perceptions occur for a very limited amount of light.

. In prosopagnosia, patients

typically have damage in their inferior parietal lobe.

are usually unable to describe any facial characteristics.

cannot describe the visual characteristics of objects.

may have face recognition problems due to problems in the fusiform gyrus.

have no trouble describing faces from memory.

. Light is detected by the

lens.

cornea.

ocular media.

pupil.

rods and cones in the retina.

. Photoreceptors

have pigments that absorb photons.

are located in the lens.

can only detect a single wavelength of light.

have photoreceptive pigments in their inner segments.

generate neural signals by the movement of all ions out of the cell.

. Rods differ from cones in that rods are

sensitive to many wavelengths of light.

responsible for our perception of color.

responsible for our perception of detail.

help with perception in low light levels.

best for acuity.

. Sensory adaptation

only occurs in the visual system.

ensures that sensory processing occurs over the full range of relevant environmental conditions.

allows for a constant number of action potentials generated by visual neurons.

only occurs in bright light.

explains why intensity is only conveyed under certain wavelengths.

. Acuity is

provided by rods.

best under low light levels.

best in the fovea.

the same as sensitivity to stimulus intensity.

inversely related to the number of cones in a region.

. The primary visual pathway

is the route from the retina to the primary visual cortex.

crosses completely in the optic chiasm.

includes the hypothalamus.

allows the visual field from one side to be represented in both the left and right occipital lobes.

All of the above

. The lateral geniculate nuclei

are located in the hypothalamus.

receive information directly from the retinal ganglion cells.

have four magnocellular layers and two parvocellular layers.

have layers that are all innervated by both M and P retinal ganglion cells.

only function as a relay station to the visual cortex.

. Which of the following is true of visual cortex?

The primary visual, or striate, cortex receives information from layer 4 of the thalamus.

The extrastriate cortical areas are only found in the occipital lobe.

Areas MT and MST are most important for processing color information.

The extrastriate cortical areas receive information from layers 1 and 5 of the primary visual cortex.

"Higher–order" visual cortical areas only process one perceptual quality.

. The dorsal visual stream

projects to the temporal lobe.

is important for object recognition.

mediates spatial aspects of vision.

is also known as the "what" pathway.

primarily sends information to the primary visual cortex.

. Topography

is only found in the visual system.

can only be demonstrated subcortically.

is just as apparent in the visual association areas as in the retina.

is demonstrated by stimulation of adjacent retinal areas resulting in stimulation of adjacent thalamic sites.

shows why each region of the retina is represented by the same amount of cortical space.

. Synesthesia

is due to multisensory integration.

can result in different musical notes being represented by different colors.

may be due to "miswiring" during neural development.

can result in specific tastes generated by certain numbers or words.

All of the above

. Neurons in the mammalian primary visual cortex form

functional regions by layer.

ocular dominance columns.

blobs in layer 4.

blobs where neurons share a preference for stimuli presented to one eye or the other.

modulated patterns only for color stimuli.

. A visual receptive field

can only be recorded in the retina.

is a spot of light in the primary visual cortex.

measures less than a degree of visual angle in the primary visual cortex.

is similar in the thalamus and primary visual cortex.

is represented by bars of the same orientation within the primary visual cortex.

. Lightness and brightness are determined by

light intensity.

light wavelength.

the perceived length of lines.

the amount of light returned to the eye.

a direct proportion to the amount of luminance.

. Which of the following does not account for color perception?

Cone opsins

Color brightness

Hue

Saturation

Rods

. Cerebral achromatopsia

is the inability to see motion.

has been demonstrated in patients with lesions in V4.

prevents people from remembering shapes.

prevents people from distinguishing brightness.

None of the above

. The size of objects is

always perceived as the same.

perceived according to regions stimulated in the primary visual cortex.

dependent on information from one eye only.

dependent on binocular rivalry.

processed primarily by areas MT and MST.

. Depth perception is based on

input from both eyes only.

stereopsis from monocular depth perception.

motion parallax for binocular depth perception.

retinal disparity.

the absence of cyclopean fusion.

Chapter 3 Quiz

Quiz Content