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Adaptation of the simple or complex nature of V1 receptive fields to visual statistics
Normalization of the linear/nonlinear input ratio suggests a previously unknown form of homeostatic control of V1 functional properties, optimizing the network nonlinearities to the statistical structure of the visual input.
Short‐term facilitation evoked during brief afferent tetani is not altered by long‐term potentiation in the guinea‐pig hippocampal CA1 region
The results suggest that the effect of LTP in the hippocampal CA1 region on non‐NMDA receptor‐mediated synaptic responses to a brief afferent tetanus does not differ from that on a low‐frequency, single volley‐induced response, and do not support the notion that LTP is based on changes in release probability of previously active synapses.
Animation of natural scene by virtual eye-movements evokes high precision and low noise in V1 neurons
- P. Baudot, Manuel Levy, O. Marre, C. Monier, M. Pananceau, Y. Frégnac
- BiologyFront. Neural Circuits
- 27 December 2013
The view that the sparsening and the time precision of the neural code in V1 may depend primarily on three factors is supported: broadband input spectrum: the bandwidth must be rich enough for recruiting optimally the diversity of spatial and time constants during recurrent processing; a minimal level of power is needed below 10 Hz to reach consistently the spiking threshold, a situation rarely reached with visual dense noise.
Distinct expressions for synaptic potentiation induced by calcium through voltage-gated calcium and N-methyl-d-aspartate receptor channels in the hippocampal CA1 region
Synaptic plasticity of the interpositorubral pathway functionally related to forelimb flexion movements.
Changes affecting both the motor and the central responses were significantly correlated, suggesting that modifications in the interpositorubral transmission efficacy might be one of the plastic correlates of forelimb flexion conditioning.
A Re-Examination of Hebbian-Covariance Rules and Spike Timing-Dependent Plasticity in Cat Visual Cortex in vivo
The existence of a correlation-based threshold in vivo is proposed, limiting the expression of STDP-induced changes outside the critical period, and which accounts for the stability of synaptic weights during sensory cortical processing in the absence of attention or reward-gated supervision.
Synaptic Correlates of Low-Level Perception in V1
- Florian Gerard-Mercier, Pedro V. Carelli, M. Pananceau, Xoana G. Troncoso, Y. Frégnac
- BiologyThe Journal of Neuroscience
- 6 April 2016
The existence of a “dynamic association field” in V1 neurons, whose spatial extent and anisotropy are transiently updated and reshaped as a function of changes in the retinal flow statistics imposed during natural oculomotor exploration is proposed.
Long-term potentiation induced by single volley activation: a mechanism for bicuculline-induced enhancement of synaptic field potentials in the CA1 hippocampal region
Stimulus-driven coordination of cortical cell assemblies and propagation of gestalt belief in V1