Lecture 14

Question 1

What were the first experiments showing how biological systems analysed directional motion?

Answer 1

qeqqew

Question 2

What was measured and what were the variables which were changed?

Answer 2

weqwwe

Question 3

What did they find out? What was the model called?

Answer 3

weqwe

Question 4

What were the key properties of the Elementary Movement Detector?

Answer 4

weqew

Question 5

How is motion analysed in a fly?

Answer 5

qwqew

Question 6

What are the different studies which can be combined?

Answer 6

weqwe

Question 7

What are the different experimental model organisms used to analyse sensory processing in insects? What applications were for each type showing how visual information is processing in biology?

Answer 7

weqwe

Question 8

What is the simplified phenomenological EMD model? Draw it? What are the different components? What is the process?

Answer 8

wqewqe

Question 9

What is a results of this?

Answer 9

eqwe

Question 10

How can the mechanism distinguish between motion in one and the opposite direction?

Answer 10

weqwe

Question 11

How is it implemented in the nervous system? Draw it?

Answer 11

weqew

Question 12

What are the necessary and sufficient conditions for a directional selective mechanism?

Answer 12

weqwe

Question 13

What happens if motion of infinite velocity? What does this therefore mean?

Answer 13

weqwe

Question 14

What is an alternative model? What is it called?

Answer 14

wqweqwe

Question 15

What are the stages of this gradient detector model?

Answer 15

wqeqwe

Question 16

What type of output does it give in the velocity domain?

Answer 16

qweqwe

Question 17

How does the gradient model work?

Answer 17

qweqwe

Question 18

Why would the gradient model not be an actual good model for biological systems?

Answer 18

weqwe

Question 19

Does the gradient model fulfil the necessary and sufficient conditions for a directional selective mechanism?

Answer 19

weqe

Question 20

How can you work out which model the fly visual system employs?

Answer 20

qweqwe

Question 21

What are the important parameters? What do they stand for?
a. What is delta I?
b. What is cf?
What is a? What are the properties?

Answer 21

weqwe

Question 22

What are the steady state responses of the two models? What are the equations?

Answer 22

weqwe

Question 23

How does the gradient detector steady state response look?

Answer 23

weqwe

Question 24

What is a torque meter? What is it used for?

Answer 24

wqeqwe

Question 25

What did it show? What is it useful for?

Answer 25

wqeqwe

Question 26

How can it be run in a closed - loop condition? What is this mode useful for?

Answer 26

qweqwe

Question 27

How did the 2 models perform is compared the output of the stimulation with experimental data? What were the four variables looked at?

Answer 27

weqwrr

Question 28

What was the outcome? Which one was better? Why?

Answer 28

weqwe

Question 29

What is the anatomy of the fly visual system? What are Lobula plates? What are the properties?

Answer 29

weqew

Question 30

What are LPTCs?

Answer 30

qweqwe

Question 31

What are the properties of the LPTCs which make it useful for experimental use? What is the response of the LPTC like?

Answer 31

qweqwe

Question 32

What is the general cells and circuits of motion vision?

Answer 32

qweqwe

Question 33

What are the comparisons of different species' motion detection?

Answer 33

weqwe

Question 34

What are the different types of LPTCs in the blowfly? What are their functions?

Answer 34

wqeqwe

Question 35

What represents the optic flow fields? What is a problem with this?

Answer 35

sdd

Question 36

How to get over this ambiguity?

Answer 36

qweqwe

Question 37

What is a Matched filter for optic flow? How does it work?

Answer 37

wqeqew

Question 38

What are the directional selective response sin LPTCs?

Answer 38

eqweqw

Question 39

What can you work out using this information?

Answer 39

weqwe

Question 40

What can you plot using this? What are the axis? What does it show?

Answer 40

weqe

Question 41

What are VS neurons?

Answer 41

WEQWE

Question 42

How to work out the flow fields and then using that the rotation axes of particular neurons are?

Answer 42

weqwe

Question 43

What are the other neurons that are more specifically responding to translation?

Answer 43

dwqewe

Question 44

What is there reduced sensitivity in the ventral part in VS neurons?

Answer 44

weqew

Question 45

What does this show?

Answer 45

weweqe

Question 46

Where is the higher sensitivity in translation neurons?

Answer 46

weqew

Question 47

Does the directional template of LPTC depend on early visual experience in flies? On humans? What was the experiment done to show this?

Answer 47

qweqe

Question 48

What does the experiment say about how this adaptation has developed?

Answer 48

wqeweq

Question 49

What is seen when plot the orientation of the eye lattice?

Answer 49

wqeqwe

Question 50

What is seen when plot the local preferred direction measured in neurons on top of the orientation of the eye lattice? What does this suggest?

Answer 50

qweqwe

Question 51

Does the derived local preferred direction which was predicted actually tell you whether the animal continues simultaneous excitation all over the field and is actually stimulating the neuron the best? What is it actually doing?

Answer 51

weqwe

Question 52

Therefore how to actually find out? What was the experiment?

Answer 52

wqeqwe

Question 53

What was the results of the experiment?

Answer 53

wqeqwe

Question 54

What is the linear control engineering framework for optic flow based flight control? What is it used to test?

Answer 54

weqwe

Question 55

How does it work? What are the components?

Answer 55

weqwe

Question 56

What is this used to implement into?

Answer 56

qweqwe

Question 57

What are the 3 parameters that can be controlled Using this system?

Answer 57

weqwe

Question 58

What does this show in terms of the principles?

Answer 58

weqew