Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hierarchical models for neural population dynamics in the presence of
  non-stationarity   Neural population activity often exhibits rich variability and temporal
structure. This variability is thought to arise from single-neuron
stochasticity, neural dynamics on short time-scales, as well as from
modulations of neural firing properties on long time-scales, often referred to
as "non-stationarity". To better understand the nature of co-variability in
neural circuits and their impact on cortical information processing, we need
statistical models that are able to capture multiple sources of variability on
different time-scales. Here, we introduce a hierarchical statistical model of
neural population activity which models both neural population dynamics as well
as inter-trial modulations in firing rates. In addition, we extend the model to
allow us to capture non-stationarities in the population dynamics itself (i.e.,
correlations across neurons).
  We develop variational inference methods for learning model parameters, and
demonstrate that the method can recover non-stationarities in both average
firing rates and correlation structure. Applied to neural population recordings
from anesthetized macaque primary visual cortex, our models provide a better
account of the structure of neural firing than stationary dynamics models.

14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess