Redwood Center for Theoretical Neuroscience, University of California, Berkeley, Berkeley, CA, USA. i-stevenson@berkeley.edu|Redwood Center for Theoretical Neuroscience, University of California, Berkeley, Berkeley, CA, USA. i-stevenson@berkeley.edu|Redwood Center for Theoretical Neuroscience, University of California, Berkeley, Berkeley, CA, USA. i-stevenson@berkeley.edu|Redwood Center for Theoretical Neuroscience, University of California, Berkeley, Berkeley, CA, USA. i-stevenson@berkeley.edu|Redwood Center for Theoretical Neuroscience, University of California, Berkeley, Berkeley, CA, USA. i-stevenson@berkeley.edu|Redwood Center for Theoretical Neuroscience, University of California, Berkeley, Berkeley, CA, USA. i-stevenson@berkeley.edu|Redwood Center for Theoretical Neuroscience, University of California, Berkeley, Berkeley, CA, USA. i-stevenson@berkeley.edu|Redwood Center for Theoretical Neuroscience, University of California, Berkeley, Berkeley, CA, USA. i-stevenson@berkeley.edu|Redwood Center for Theoretical Neuroscience, University of California, Berkeley, Berkeley, CA, USA. i-stevenson@berkeley.edu|Redwood Center for Theoretical Neuroscience, University of California, Berkeley, Berkeley, CA, USA. i-stevenson@berkeley.edu|Redwood Center for Theoretical Neuroscience, University of California, Berkeley, Berkeley, CA, USA. i-stevenson@berkeley.edu|Redwood Center for Theoretical Neuroscience, University of California, Berkeley, Berkeley, CA, USA. i-stevenson@berkeley.edu|Redwood Center for Theoretical Neuroscience, University of California, Berkeley, Berkeley, CA, USA. i-stevenson@berkeley.edu|Redwood Center for Theoretical Neuroscience, University of California, Berkeley, Berkeley, CA, USA. i-stevenson@berkeley.edu