Receptive Fields and the Optimal Stimulus

Receptive fields and the optimal stimulus.

Stimulus ensemble and cortical layer determine V1 spatial receptive fields.

The concept of receptive field is a linear, feed-forward view of visual signal processing. Frequently used models of V1 neurons, like the dynamic Linear filter--static nonlinearity--Poisson [corrected] spike encoder model, predict that receptive fields measured with different stimulus ensembles should be similar. Here, we tested this concept by comparing spatiotemporal maps of V1 neurons derive...

Receptive fields

Drosophila APC has a role in maintaining adherens junctions, and also helps to tether mitotic spindles to the cortex and to orient them in the epithelial plane. In mammalian cells, APC has been implicated in cell migration. APC also helps safeguard the fidelity of chromosome segregation in mitotic cells. Loss of APC’s various functions at the cell periphery may contribute to tumour progression....

Deriving Receptive Fields Using an Optimal Encoding Criterion

An information-theoretic optimization principle ('infomax') has previously been used for unsupervised learning of statistical regularities in an input ensemble. The principle states that the inputoutput mapping implemented by a processing stage should be chosen so as to maximize the average mutual information between input and output patterns, subject to constraints and in the presence of proce...

Spatial structure of multiwhisker receptive fields in the barrel cortex is stimulus dependent.

The tactile sensations mediated by the whisker-trigeminal system allow rodents to efficiently detect and discriminate objects. These capabilities rely strongly on the temporal and spatial structure of whisker deflections. Subthreshold but also spiking receptive fields in the barrel cortex encompass a large number of vibrissae, and it seems likely that the functional properties of these multiwhi...