Quiz 5.2

____ respond to a particular feature of a stimulus

Feature detectors

____ cells axons make up the optic nerve.​

Ganglion

Cortical area ____ appears to be where conscious visual perception occurs

V1

Infants with cataracts need to have surgical repair ____.

as early as possible

Astigmatism refers to the

asymmetric curvature of eyes

In foveal vision

each ganglion cell is excited by a single cone

In the vertebrate retina, which cells are responsible for lateral inhibition?

horizontal cells

Branches of the optic nerve go directly to what areas of the brain?​

lateral geniculate and superior colliculus

Cutting the left optic nerve in front of the optic chiasm would result in blindness in the

left eye

The ability to detect movement better than color in our peripheral vision is largely due to

magnocellular neurons in the periphery

Axons from the lateral geniculate extend to which area of the cerebral cortex?​

occipital lobe

The optic nerves from the right and left eye initially meet at the ____.

optic chiasm

Being able to detect fine details of a color painting would depend most on which type of ganglion cells?​

parvocellular

V1 neurons would be most strongly activated by viewing

repeating stripes on a flag

In depth perception, different views are received by each eye, depending on the distance of the object being viewed. What is this called?​

retinal disparity

Stereoscopic depth perception requires the brain to detect

retinal disparity

In the visual system, the ____ and ____ constantly feed information back and forth.​

thalamus; cortex

The primary visual cortex sends its information

to area V2

What is strabismus?

​a failure of the two eyes to focus on the same thing at the same time

What is the shape of the receptive field to which a simple cell in the primary visual cortex responds?

​bar in a particular orientation

The one additional feature that hypercomplex cells have that complex cells do not is that hypercomplex cells

​have a strong inhibitory area at one end of its receptive field

What is responsible for sharpening contrast at visual borders?

​lateral inhibition

The receptive field of a receptor is the

​point in space from which light strikes the receptor

The ____ of any neuron in the visual system is the area of the visual field that excites or inhibits it

​receptive field

The lateral geniculate nucleus is part of the

​thalamus

What would be the likely outcome of a person who was blind at birth, and had vision restored later in life by the removal of cataracts (clouded lenses)?

​trouble describing the shapes of objects