Different Functional Roles of Feedback and Horizontal Connnections

Virginia de Sa

Q: (Regarding the processing of lip movement patterns). Why did you use the motion and not the position.

A: Expediency. That system was already working when I started my work.

Q: Do you have any sense of how this scales for more categories.

A: No we haven't done the experiment on more classes. If we have more modalities the task is clearly easier.

Comment: Feedback and horizontal connections both bring in greater context but feeback conxsn are unique in bringing back information from other sensory modalities. Horizontal conections tend to connect like recpetive fields.

Comment(Regarding the slice experiments on rat): There aren't many lateral connections in rat. So her experiment was on short-range connections.

Q: (Regarding the slice experiment) Where is your recording electrode?

A: In layer 2-3.

Q: Is maximising agreement different from minimizing disagreement?

A: In the way it is defined here, both turn out to be the same.

Comment: Isn't it the independence of the modalities that helped the inter-training of the modalities?

Q: Does the association come about because lip-movement and the associated phoneme have the same physical cause?

A: Yes.




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