Alessandra Angelucci

TL;DR: It is shown that despite their inability to report the orientation of an individual patch, observers can reliably estimate the average orientation, demonstrating that the local orientation signals are combined rather than lost.

TL;DR: It is found that monosynaptic horizontal connections within area V1 are of an appropriate spatial scale to mediate interactions within the SF of V1 neurons and to underlie contrast-dependent changes in SF size, which could represent an anatomical substrate for contextual modulation and global-to-local integration of visual signals.

TL;DR: In ferrets in which retinal projections are routed into the auditory pathway, visually responsive neurons in ‘rewired’ primary auditory cortex are also organized into orientation modules, showing that afferent activity has a profound influence on diverse components of cortical circuitry, including thalamocortical and local intracortical connections, which are involved in the generation of orientation tuning, and long-range horizontal connections which are important in creating an orientation map.

TL;DR: In this article, the authors proposed specific mechanisms by which each connection type contributes to the receptive field (RF) center and surround of V1 neurons, and implement these hypotheses into a recurrent network model.

TL;DR: Evidence is presented that inactivation of higher order areas leads to a major decrease in the strength of the suppressive surround of neurons in lower order areas, supporting the hypothesis that feedback connections play a major role in center-surround interactions.