V1 neurons are functionally organized in orientation columns in primates. Whether spatial
frequency (SF) columns also exist is less clear because mixed results have been reported. A …

Orientation tuning is a fundamental response property of V1 neurons and has been
extensively studied with single-/multiunit recording and intrinsic signal optical imaging. Long …

Orientation and spatial frequency tuning are highly salient properties of neurons in primary
visual cortex (V1). The combined organization of these particular tuning properties in the …

Abstract In vivo calcium (Ca 2+) imaging using two-photon microscopy allows activity to be
monitored simultaneously from hundreds of individual neurons within a local population …

A majority of neurons in the monkey primary visual cortex (V1) are tuned to stimulus
orientations. Preferred orientations and tuning strengths vary among V1 neurons. The …

Receptive field (RF) size and preferred spatial frequency (SF) vary greatly across the
primary visual cortex (V1), increasing in a scale invariant fashion with eccentricity. Recent …

Spatial frequency (SF) and orientation tuning are intrinsic properties of neurons in primary
visual cortex (area V1). To investigate the neural mechanisms mediating selectivity in the …

We studied the steady-state orientation selectivity of single neurons in macaque primary
visual cortex (V1). To analyze the data, two measures of orientation tuning selectivity …

Spatial frequency tuning in the lateral geniculate nucleus of the thalamus (LGN) and primary
visual cortex (V1) differ substantially. LGN responses are largely low-pass in spatial …

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 …