Lecture 8 - stimulus localisation

Question 1

important areas involved in stimulus localisation and motion processing

Answer 1

• retina (orientation selective ganglion cells, motion anticipation)
• dorsal stream in cortex
• superior and inferior colliculus

Question 2

where does superior colliculus receive input from?

Answer 2

ganglion cells, auditory neurons and other sensory information systems

Question 3

what is the main function of superior colliculus

Answer 3

regulating eye movement and orientation towards stimulus (saccadic movements)

Question 4

where does the layers of the superior colliculus receive input from?

Answer 4

V1 cortex

Question 5

what organisation does the superior colliculus have?

Answer 5

temporal-nasal organisation of the inputs

Question 6

what are retinotopic maps? (and where)

Answer 6

organisation where neighbouring cells in the retina feed information to neighboruing places in their target structures (LGN, SC, cortex)

Question 7

what are the brain areas involved in orientation?

Answer 7

tectum, pretectum and hindbrain motor neurons

Question 8

processing of motion in higher areas

Answer 8

happens in dorsal stream in parietal pathway ‘where’

Question 9

inputs of amacrine vs bipolar cells

Answer 9

excitation is received from bipolar cells and inhibition received from amacrine cells

Question 10

what happens in the preferred direction?

Answer 10

excitation is larger and inhibition is smaller and delayed

Question 11

what happens in null direction?

Answer 11

excitation is smaller and delayed and inhibition is larger