Local and global synaptic credit assignment

Add to your list(s) Download to your calendar using vCal

• Dr Rui Ponte Costa (University of Bristol)
• Friday 18 January 2019, 11:00-12:00
• Cambridge University Engineering Department, CBL, BE4-38 (http://learning.eng.cam.ac.uk/Public/Directions).

If you have a question about this talk, please contact Rodrigo Echeveste.

For animals to learn to interact with their environments millions of synapses across several brain areas need to be modified appropriately. Understanding how the brain assigns credit and modifies a particular synapse is a long standing problem in neuroscience. In this talk I will start by describing our work on a theoretical framework of how synapses may (locally) assign credit to their response parameters to achieve a desired target. Such target responses may, in turn, be computed by gradient descent algorithms that compare the network output with the desired outcome. In machine learning, the backpropagation algorithm is the prime example of one such solution which solves the global synaptic credit assignment problem. I will finish by discussing recent work proposing that cortical microcircuits with dendritic properties may indeed approximate backprop. Overall, our work provides a fresh perspective on how the brain may solve the synaptic credit assignment problem.

This talk is part of the Computational Neuroscience series.

This talk is included in these lists:

• All Talks (aka the CURE list)
• Biology
• Biology
• CBL important
• CamBridgeSens
• Cambridge Centre for Data-Driven Discovery (C2D3)
• Cambridge Neuroscience Seminars
• Cambridge University Engineering Department, CBL, BE4-38 (http://learning.eng.cam.ac.uk/Public/Directions)
• Cambridge talks
• Chris Davis' list
• Computational Neuroscience
• Computational and Biological Learning Seminar Series
• Featured lists
• Guy Emerson's list
• Hanchen DaDaDash
• Inference Group Journal Clubs
• Inference Group Summary
• Information Engineering Division seminar list
• Interested Talks
• Life Science
• Life Science Interface Seminars
• Life Sciences
• Life Sciences
• ME Seminar
• Neuroscience
• Neuroscience Seminars
• Neuroscience Seminars
• Quantum Matter Journal Club
• Required lists for MLG
• Stem Cells & Regenerative Medicine
• TQS Journal Clubs
• Trust & Technology Initiative - interesting events
• bld31
• custom
• dh539
• my_list
• ndk22's list
• ob366-ai4er
• other talks
• rp587
• se456's list
• yk373's list

Note that ex-directory lists are not shown.