Li, Y. et al. Clonally related visual cortical neurons show similar stimulus feature selectivity.
The stimulus localization process is faster than the stimulus feature extraction process.
In this design, participants perform a discrimination task while oddball stimuli deviate in a task-irrelevant stimulus feature.
If this is the case, saliency of different representations should be of prime importance for a perceptual decision — and not the exact stimulus feature regarding which two stimuli are compared.
In the current study, we investigated the spatial specificity of feature-based expectation by inducing expectations of a specific stimulus feature (i.e., orientation) at a specific location, and probing the effects on neural sensory processing across the visual field.
Here, we investigated this by inducing expectations of a specific stimulus feature at a specific location, and probing the effects on sensory processing across the visual field using fMRI.
Neurons with similar stimulus response properties are clustered together in vertical columns in cortex, giving rise to what has come to be known as functional architecture – the mapping of various stimulus feature dimensions onto the cortical sheet.
Event-related fMRI methods permitted the isolation of attentional control activity during orienting to a location or to a nonspatial stimulus feature (color).
The negative priming (NP) effect refers to the observed increase in identification time for a current target stimulus or stimulus feature (the "probe") that has been employed as a distractor stimulus or stimulus feature on the previous trial (the "prime"), representing strong evidence that ignored information is actively processed to a high level by selective attention systems.
This work has also been extended to models of how cortical circuits amplify stimulus feature selectivity via spontaneous symmetry breaking mechanisms [6, 9].
It would stem from the differences in the suitability of the modalities for the perceptual coding of a certain stimulus feature [21].
