Stimulus location

Question 1

What are some examples of object localisation?

Answer 1

Orienting Reflex
Smooth pursuit
Motion anticipation
Saccadic movements during object inspection

Question 2

What is the function of the superior colliculus?

Answer 2

Regulation of saccadic movements

Question 3

Where does superior colliculus receive information from?

Answer 3

Ganglion cells, Auditory system, Somatosensory system

Question 4

What does Retinoptic map mean?

Answer 4

Organisation whereby neighbouring cells in retina feed information to neighbouring places in target structures

Question 5

What areas of the brain are involved in orientation?

Answer 5

Tectum, Pretectum, Hindbrain motor neurones

Question 6

What is the dorsal stream responsible for?

Answer 6

Stimulus location

Question 7

Dorsal stream pathway

Answer 7

M-ganglion cell -> lateral geniculate nucleus magno cell -> V1 -> V2 -> V3 -> MT -> Parietal

Question 8

How does direction selectivity work

Answer 8

ON/OFF cells
Respond to movement in some directions but not others
Receives excitation from bipolar cells and inhibition from amacrine cells
More excitation in preferred direction

Question 9

Morphology of direction selective cells

Answer 9

Highly asymmetric - preferred direction can be guessed from the morphology