Biased competition through variations in amplitude of γ-oscillations

Experiments in visual cortex have shown that the firing rate of a neuron in response to the simultaneous presentation of a preferred and non-preferred stimulus within the receptive field is intermediate between that for the two stimuli alone (stimulus competition). Attention directed to one of the stimuli drives the response towards the response induced by the attended stimulus alone (selective attention). This study shows that a simple feedforward model with fixed synaptic conductance values can reproduce these two phenomena using synchronization in the gamma-frequency range to increase the effective synaptic gain for the responses to the attended stimulus. The performance of the model is robust to changes in the parameter values. The model predicts that the phase locking between presynaptic input and output spikes increases with attention

Precise timing of neuronal discharges within and across cortical areas: Implications for synaptic transmission

Contains fulltext : 13497.pdf (publisher's version ) (Open Access

Complex spatio-temporal patterns of correlated oscillatory activity in multiple occipital, parietal, and frontal areas of the awake monkey during a visuo-motor task

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Complex spatio-temporal patterns of correlated oscillatory activity in multiple occipital, parietal, and frontal areas of the awake monkey during a visuo-motor task

Bunganuc BluffKelley NGGDPP Grant 2019https://digitalmaine.com/mgs_geologic_field_photos/10794/thumbnail.jp

The putative role of precise timing in cortical processing

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Stimulus-dependent correlations in stochastic networks

Contains fulltext : 29691.pdf (publisher's version ) (Open Access) Contains fulltext : 29691.pdf (preprint version ) (Open Access

Spiking Associative Memory and Scene Segmentation by Synchronization of Cortical Activity

For the recognition of objects there are a number of computational requirements that go beyond the detection of simple geometric features like oriented lines. When there are several partially occluded objects present in a visual scene one has to have an internal knowledge about the object to be identified, e.g. using associative memories