Relating accumulator model parameters and neural dynamics

Relating Accumulator Model Parameters and Neural Dynamics.

Accumulator models explain decision-making as an accumulation of evidence to a response threshold. Specific model parameters are associated with specific model mechanisms, such as the time when accumulation begins, the average rate of evidence accumulation, and the threshold. These mechanisms determine both the within-trial dynamics of evidence accumulation and the predicted behavior. Cognitive...

Relating neural dynamics to neural coding.

We demonstrate that two key theoretical objects used widely in computational neuroscience, the phase-resetting curve (PRC) from dynamics and the spike triggered average (STA) from statistical analysis, are closely related when neurons fire in a nearly regular manner and the stimulus is sufficiently small. We prove that the STA due to injected noisy current is proportional to the derivative of t...

Se p 20 07 Relating Neural Dynamics to Neural Coding

G. Bard Ermentrout, Roberto F. Galán, Nathaniel N. Urban University of Pittsburgh, Department of Mathematics, Thackery Hall, Pittsburgh, PA 15260 Carnegie Mellon University, Department of Biological Sciences. Mellon Institute, Pittsburgh PA 15213 Center for the Neural Basis of Cognition Pittsburgh PA 15213 Abstract We demonstrate that two key theoretical objects used widely in Computational Neu...

Relating Neural Dynamics to Olfactory Coding and Behavior

Dynamics of Dual Prism Adaptation: Relating Novel Experimental Results to a Minimalistic Neural Model

In everyday life, humans interact with a dynamic environment often requiring rapid adaptation of visual perception and motor control. In particular, new visuo-motor mappings must be learned while old skills have to be kept, such that after adaptation, subjects may be able to quickly change between two different modes of generating movements ('dual-adaptation'). A fundamental question is how the...