Lecture 6

Question 1

What do neuron’s work as? What is the importance of this?

Answer 1

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Question 2

What is the phase locking mechanism? What happens if aligned? What happens if not aligned?

Answer 2

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Question 3

How is the AND gate involved with the phase locking mechanism seen?

Answer 3

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Question 4

What is coincidence detection?

Answer 4

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Question 5

What is the speed of an AP? What is a consequent of this?

Answer 5

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Question 6

What is the anatomy of the pathway the action potential takes?

Answer 6

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Question 7

Where does the AP travel from the cochlear nucleus? Why is this important? What is the consequence of this?

Answer 7

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Question 8

What is the Jeffress model of coincidence detection for sound localisation? What are the features of it? What animals is this model involved in?

Answer 8

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Question 9

Why only respond when AP from both the R and L ear arrive together?

Answer 9

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Question 10

What are the components needed for the calculation of ITD?

Answer 10

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Question 11

How is ILD calculated? What position is this used to compute?

Answer 11

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Question 12

How can compute the compute the sound direction using as a cue the ILD? What is needed? What are the components involved?

Answer 12

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Question 13

What is the balance needed in ILD?

Answer 13

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Question 14

Where does the midbrain auditory localisation pathway converge?

Answer 14

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Question 15

Where do the MSO neurons project to? What are the neuron’s tuned to? What manner do they project in?

Answer 15

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Question 16

Why are the frequency bands not a good final representation of sound location?

Answer 16

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Question 17

What is phase ambiguity?

Answer 17

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Question 18

How to solve the problem of phase ambiguity? How does the brain solve this problem? What are the components involved?

Answer 18

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Question 19

Why is the visual system important in hearing and sound localisation?

Answer 19

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Question 20

What was the experiments which they did to show the recalibration of the auditory space map by the visual map? What did this experiment show?

Answer 20

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Question 21

Where is the tonotopic information established? Which components and pathways is it preserved?

Answer 21

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Question 22

Where is it not preserved? Why?

Answer 22

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Question 23

In these areas what are the special properties of the neuron?

Answer 23

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Question 24

Why is this feature of multimodal information?

Answer 24

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Question 25

How is selectivity and invariance in a single neuron? Example?

Answer 25

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Question 26

How are AND or OR -like operations in individual neurons important for selectivity and invariance?

Answer 26

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Question 27

How is selectivity for the angle of the bar achieved? What kind of gate? What if it is the opposite gate - what shape?

Answer 27

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Question 28

How is position invariance made? What kind of gate? What if opposite gate - what shape?

Answer 28

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Question 29

What are the features of a tuning fork?

Answer 29

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Question 30

What is the receptive field in auditory?

Answer 30

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Question 31

What is a Spectro-Temporal Receptive field (STRF)?

Answer 31

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