[Crib-list] TODAY: SPEAKER: Alexander Kell (MIT) | CRIBB Seminar talk | Friday, June 2, 2017 | TIME: 12:00 PM - 1:00 PM | Room 32-155 (fwd)

[daisymae@mit.edu]

   T O D A Y . . .



 	COMPUTATIONAL RESEARCH in BOSTON and BEYOND SEMINAR


DATE:		FRIDAY, JUNE 2, 2017
TIME:		12:00 PM  1:00 PM
LOCATION:	Building 32, Room 155  (STATA)

 		 Pizza and beverages will be provided at 11:45 AM
 		 outside Room 32-155



TITLE:		Using deep learning to model and to understand
 		 human auditory cortex


SPEAKER:	Alexander Kell  (MIT)


ABSTRACT:

A core goal of auditory neuroscience is to build quantitative models that 
predict cortical responses to real-world sounds. Reasoning that a complete 
model of auditory cortex must solve ecologically relevant tasks, we optimized a 
hierarchical neural network for speech and music recognition. The resulting 
network contained separate music and speech pathways following several shared 
processing stages, potentially replicating human cortical organization. The 
network, which performed both tasks as well as humans, exhibited human-like 
errors despite not being optimized to do so, suggesting common constraints on 
network and human performance. The network predicted fMRI voxel responses 
substantially better than traditional spectrotemporal filter models throughout 
auditory cortex. It also provided a quantitative signature of cortical 
representational hierarchy - primary and non-primary responses were best 
predicted by intermediate and late network layers, respectively. The results 
suggest that real-world tasks substantially constrain neural processing and 
behavior, and thus task optimization may provide a powerful approach for 
modeling sensory systems.

==================================================

Massachusetts Institute of Technology
Cambridge, MA


For information about the Computational Research in Boston and Beyond Seminar, 
please visit...


 			http://math.mit.edu/crib/



---
Shirley A. Entzminger
Administrative Assistant II
Department of Mathematics
Massachusetts Institute of Technology
77 Massachusetts Avenue
Building 2, Room 350A
Cambridge, MA 02139
PHONE:  (617) 253-4347
FAX:    (617) 253-4358
E-mail: daisymae at math.mit.edu
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