Vision III (part 2)

is the organizing principle for the visual system where neighbouring cells in the retina project to neighbouring cells in the LGN and V1.

(a)  

What is the definition of retinotopy?

(a)  

True or False.

Retinal map are not distorted.

• True

• False

What is the concept describing the distortion of the retinotopic map?

• Retinal magnification

• Cortical magnification

• Retinotopy

• Causal magnification

What causes distortion in the retinotopic map?

Answer explanation

Cortical magnification, where the fovea (center of vision) is amplified because there is many more neurons in the V1 receiving input from the central vision. And there is overlap in the field of vision meaning these cell will firing

In what layer does binocular neurons present in the ocular dominance columns?

(a)  

What layers have binocular receptive fields in ocular dominance column?

(a)  

What is meant by binocular receptive field in ocular dominance columns?

Answer explanation

When a object/stimuli share a visual field, which increase the firing rate in the layer III of ocular dominance

Where are receptive field concentric circles?

• LGN

• Retina

• Layer IV

• Layer III

• Layer 2

What kind of stimuli do neurons in V1 response best to?

• Circular light

• Dots of light

• Bars of light

• Movement