Slow ramping emerges from spontaneous fluctuations in spiking neural networks.

ABSTRACT: The capacity to initiate actions endogenously is critical for goal-directed behavior. Spontaneous voluntary actions are typically preceded by slow-ramping activity in medial frontal cortex that begins around two seconds before movement, which may reflect spontaneous fluctuations that influence action timing. However, the mechanisms by which these slow ramping signals emerge from single-neuron and network dynamics remain poorly understood. Here, we developed a spiking neural-network model that produces spontaneous slow ramping activity in single neurons and population activity with onsets ~2 s before threshold crossings. A key prediction of our model is that neurons that ramp together have correlated firing patterns before ramping onset. We confirmed this model-derived hypothesis in a datas

SUBMITTER: Gavenas J 

PROVIDER: S-EPMC11344096 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature