no code implementations • 19 Apr 2023 • Ian H. Stevenson
Whether, when, and how causal interactions between neurons can be meaningfully studied from observations of neural activity alone are vital questions in neural data analysis.
no code implementations • 21 May 2022 • Ganchao Wei, Ian H. Stevenson, XiaoJing Wang
To identify populations directly related to neural activity, we develop a clustering method based on a mixture of dynamic Poisson factor analyzers (mixDPFA) model, with the number of clusters and dimension of latent factors for each cluster treated as unknown parameters.
no code implementations • 1 May 2022 • Ganchao Wei, Ian H. Stevenson
The CMP distribution can flexibly describe firing patterns that are both under- and over-dispersed relative to the Poisson distribution.
1 code implementation • 2 Feb 2021 • Ganchao Wei, Ian H. Stevenson
Using simulations, we first show that this model can accurately recover time-varying synaptic weights 1) for both depressing and facilitating synapses, 2) with a variety of long-term changes (including realistic changes, such as due to STDP), 3) with a range of pre- and post-synaptic firing rates, and 4) for both excitatory and inhibitory synapses.