Week 4

Question 1

What happens when the small involuntary eye movements are stabilised?

Answer 1

Edges of objects fade, entire object disappears completely, space previously occupied is filled in by brain

Question 2

Explain the Boundary Extension phenomenon:

Answer 2

When recalling a scene, a broader view of teh scene is ‘recalled’ compared to what was given.

Question 3

When retaining visual information the _____ is well represented, but the ___ is not.

Answer 3

meaning (gist), surface properties.

Question 4

What receives input from receptor cells to ‘see’ small receptive fields in vision?

Answer 4

ganglion cells

Question 5

Sort the flow of synapses through the visual pathway. Occipital lobe, LGN, Optic nerve, Superior Colliculus

Answer 5

Optic Nerve, LGN, OL, SC

Question 6

Ganglion and LGN cells respond to

Answer 6

dots of light on the retina

Question 7

Functions of the superior colliculi are:

Answer 7

guiding eye movements, locating objects in space

Question 8

Functions of the LGN are:

Answer 8

object recognition

Question 9

Where does the LGN project to?

Answer 9

The visual cortex in the occipital lobe

Question 10

What would happen if there were no small eye movements, i.e. no change in retinal images???

Answer 10

Borders fade, object disappears, space filled in by brain - similar to blind spot. The neuron ‘assumes’ the neuron next to it is receiving the same input that it is.

Question 11

Is visual perception most accurately contemplated as creating an exact copy of our surrounds, or creating an interpretation of our environment?

Answer 11

interpretation