36 citations · 135 across the 8 of their papers we have counts for
8 papers
Collective dynamics in the presence of finite-width pulses
Afifurrahman, Ekkehard Ullner, Antonio Politi
The idealisation of neuronal pulses as -spikes is a convenient approach in neuroscience but can sometimes lead to erroneous conclusions. We investigate the effect of a finite pu…
Stability of synchronous states in sparse neuronal networks
Afifurrahman, Ekkehard Ullner, Antonio Politi
The stability of synchronous states is analysed in the context of two populations of inhibitory and excitatory neurons, characterized by different pulse-widths. The problem is redu…
Quantitative and qualitative analysis of asynchronous neural activity
Ekkehard Ullner, Antonio Politi, Alessandro Torcini
The activity of a sparse network of leaky integrate-and-fire neurons is carefully revisited with reference to a regime of a bona-fide asynchronous dynamics. The study is preceded b…
Collective irregular dynamics in balanced networks of leaky integrate-and-fire neurons
Antonio Politi, Ekkehard Ullner, Alessandro Torcini
We extensively explore networks of weakly unbalanced, leaky integrate-and-fire (LIF) neurons for different coupling strength, connectivity, and by varying the degree of refractorin…
Ubiquity of collective irregular dynamics in balanced networks of spiking neurons
Ekkehard Ullner, Antonio Politi, Alessandro Torcini
We revisit the dynamics of a prototypical model of balanced activity in networks of spiking neutrons. A detailed investigation of the thermodynamic limit for fixed density of conne…
Cortical Spike Synchrony as a Measure of Input Familiarity
Clemens Korndörfer, Ekkehard Ullner, Jordi García-Ojalvo +1
Spike synchrony, which occurs in various cortical areas in response to specific perception, action and memory tasks, has sparked a long-standing debate on the nature of temporal or…