Spectral receptive fields do not explain tuning for boundary curvature in V4.

Anitha Pasupathy and Wyeth Bair boundary curvature in V 4 Spectral receptive fields do not explain tuning for

Spectral Receptive Fields Do Not Explain Tuning for Boundary

23 24 The mid-level visual cortical area V4 in the primate is thought to be critical for the neural 25 representation of visual shape. Several studies agree that V4 neurons respond to 26 contour features, e.g., convexities and concavities along a shape boundary, that are 27 more complex than the oriented segments encoded by neurons in the primary visual 28 cortex. Here we compare two distinct a...

Spectral receptive field properties explain shape selectivity in area V4.

Neurons in cortical area V4 respond selectively to complex visual patterns such as curved contours and non-Cartesian gratings. Most previous experiments in V4 have measured responses to small, idiosyncratic stimulus sets and no single functional model yet accounts for all of the disparate results. We propose that one model, the spectral receptive field (SRF), can explain many observations of se...

Spectral properties of V4 neurons in the macaque.

Spectral properties of 129 cells in the V4 area of 5 macaque monkeys were studied quantitatively with narrow-band and broad-band colored lights. The large majority of cells exhibited some degree of wavelength sensitivity within their receptive fields. The half-bandwidth of the primary peak in the spectral-response curve was less than 50 nm for 72% of the cells; the mean half-bandwidth of these ...

Contour, color and shape analysis beyond the striate cortex.

The corticocortical pathway from striate cortex into the temporal lobe plays a crucial role in the visual recognition of objects. Anatomical studies indicate that this pathway is mainly organized as a serial hierarchy of multiple visual areas, including V1, V2, V3, V4, and inferior temporal cortex (IT). As expected from the anatomy, we have found that neurons in V4 and IT, like those in V1 and ...