Stimulus Location

Question 1

Orienting reflex

Answer 1

orientation of the head and eyes to focus fovea on stimulus

Question 2

Smooth pursuit

Answer 2

following moving object

Question 3

Motion anticipation

Answer 3

prediction of motion during prey capture

Question 4

When do saccdic movements occur

Answer 4

during object inspection

Question 5

What does the fovea inspect

Answer 5

specific parts of object - borders of face

Question 6

Optic tectum function

Answer 6

orienting reflex

Question 7

Why do we need motion anticipation

Answer 7

phototransduction cascade - takes around 60ms - visuals are recent past

Question 8

Brain areas involved in stimulus location and motion processing

Answer 8

retina, dorsal stream in cortex, superior and inferior colliculus

Question 9

Where does the superior colliculus receive inputs from

Answer 9

ganglion cells, auditory system, and somatosensory system

Question 10

What region might potentially send input to the superior colliculus

Answer 10

olfactory system

Question 11

Superior colliculus functions

Answer 11

integrate info from different sensory modalities, regulation of saccadic movements

Question 12

Lesion of superior colliculus

Answer 12

disappearance of orienting reflex

Question 13

Retinotopic map

Answer 13

neighbouring cells in retina feed info to neighbouring places in target structures

Question 14

Dorsal stream function

Answer 14

processes motion in higher areas

Question 15

Preferred direction

Answer 15

direction that evokes maximum response

Question 16

Direction selectivity evidence

Answer 16

occurs in retina

Question 17

What cells in the retina exhibit direction selectivity evidence

Answer 17

typical ON/OFF cells

Question 18

What is direction selectivity

Answer 18

cells respond to movements in some directions but not others

Question 19

Morphology of direction selective cells

Answer 19

highly asymmetric

Question 20

How can preferred direction be guessed

Answer 20

from morphology

Question 21

Retinal ganglion cell input

Answer 21

excitatory and inhibitory

Question 22

Inhibitory input on retinal ganglion cells

Answer 22

amacrine cells

Question 23

Excitatory input on retinal ganglion cells

Answer 23

bipolar cells

Question 24

DS cells receive excitatory input from

Answer 24

bipolar cells

Question 25

DS cells receive inhibitory input from

Answer 25

amacrine cells

Question 26

Excitation/inhibition when stimulus moves in preferred direction

Answer 26

excitation large, inhibition small

Question 27

Effect of preferred stimulus direction on cells

Answer 27

sufficient to cause spiking

Question 28

Effect of stimulus null direction - excitation/inhibition

Answer 28

excitation small, inhibition large

Question 29

DS cells

Answer 29

direction selective

Question 30

What are ganglion cells responsible for

Answer 30

motion processing

Question 31

What does the retina predict

Answer 31

location of moving objects