Week 2 RFL - EEG

Question 1

Claim 1, There is a network ___________________________.

This generates the __________________. The striate cortex (__) is ______to ________ – areas higher in the visual hierarchy ___________________ SASAKI ET AL (2005).

Answer 1

Claim 1, There is a network of symmetry sensitive brain areas in the extrastriate cortex.
This generates the Sustained Posterior Negativity (SPN). The striate cortex (V1) is not sensitive to symmetry – areas higher in the visual hierarchy are sensitive to symmetry such as the extrastriate cortex SASAKI ET AL (2005).

Question 2

What is an Event Related Potential (ERP)?

Answer 2

The signal you get from EEG is called an ERP. ERPs are an electrophysiological marker of a discrete cognitive or perceptual event in the brain. A typical EEG experiment requires hundreds of trials. We average them to see the ERPs

Question 3

Claim 2, The extrastriate network __________ even when ___________. No difference in SPN of people seeing symmetry in ________________________.

Answer 3

Claim 2, The extrastriate network responds to symmetry automatically, even when people are not attending to it. No difference in SPN of people seeing symmetry in colour compared to in the dark.

Question 4

Claim 3, The amplitude of the symmetry response ___________________________________.
■ ‘Goodness’ means _____________________.

Answer 4

Claim 3, The amplitude of the symmetry response scales with the perceptual goodness of different regularities.
■ ‘Goodness’ means perceptual strength or salience of a configuration

Question 5

Claim 4, The network always ____________________. Sometimes it can go beyond this, and__________________________.

Answer 5

Claim 4, The network always responds to symmetry in the image. Sometimes it can go beyond this, and recover symmetry in the object.

Question 6

Claim 5, The network can code ____________________.

Answer 6

Claim 5, The network can code symmetry independently in each hemisphere.

Question 7

Claim 6, The brain has a _______ design. The left visual field projects to the ___________ and vice versa

Answer 7

Claim 6, The brain has a crossover design. The left visual field projects to the right hemisphere, and vice versa

Question 8

How does the network respond to anti-symmetry?

Answer 8

The network responds to symmetry and anti-symmetry, but the response to symmetry is often stronger.

Question 9

Claim 7 – ________________.

Answer 9

Claim 7 – The system is indifferent to colour.

Question 10

Claim 8 - The network can integrate __________________________.

Answer 10

Claim 8 - The network can integrate pattern information presented at different points in time.