Integration dynamics and choice probabilities

Very informative post – “Integration dynamics and choice probabilities”

Pillow Lab Blog

Recently in lab meeting, I presented

Sensory integration dynamics in a hierarchical network explains choice probabilities in cortical area MT

Klaus Wimmer, Albert Compte, Alex Roxin, Diogo Peixoto, Alfonso Renart & Jaime de la Rocha. Nature Communications, 2015

Wimmer et al. reanalyze and reinterpret a classic dataset of neural recordings from MT while monkeys perform a motion discrimination task. The classic result shows that the firing rates of neurons in MT are correlated with the monkey’s choice, even when the stimulus is the same. This covariation of neural activity and choice, termed choice probability, could indicate sensory variability causing behavioral variability or it could result from top-down signals that reflect the monkey’s choice. To investigate the source of choice probabilities, the authors use a two-stage, hierarchical network model of integrate and fire neurons tuned to mimic the dynamics of MT and LIP neurons and compare the model to what they find…

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