Spatial Receptive Field Organization of Macaque V4 Neurons
نویسندگان
چکیده
منابع مشابه
Spatial receptive field organization of macaque V4 neurons.
Subfield analysis of the receptive fields (RFs) of parafoveal V4 complex cells demonstrates directly that most RFs are tiled by overlapping second-order excitatory inputs that for any given V4 cell are predominantly selective to the same preferred values of spatial frequency and orientation. These results extend hierarchical principles of RF organization in the spatial, orientation and spatial ...
متن کاملOrganization of color-selective neurons in macaque visual area V4.
Cortical area V4 in monkeys contains neurons that respond selectively to particular colors. It has been controversial how these color-selective neurons are spatially organized in V4. One view asserts that color-selective neurons are organized in columns with different colors orderly mapped across the cortex, whereas other studies have found no evidence for columnar organization or any other clu...
متن کاملPresaccadic discrimination of receptive field stimuli by area V4 neurons
Previous studies have shown that the visual responses of neurons in extrastriate area V4 are enhanced prior to saccadic eye movements that target receptive field (RF) stimuli. We used receiver-operator characteristic (ROC) analysis to quantify how well V4 neurons could discriminate stable RF stimuli targeted by visually-guided saccades or ignored during saccades elsewhere. We found that discrim...
متن کاملSelectivity and spatial distribution of signals from the receptive field surround in macaque V1 neurons.
The responsiveness of neurons in V1 is modulated by stimuli placed outside their classical receptive fields. This nonclassical surround provides input from a larger portion of the visual scene than originally thought, permitting integration of information at early levels in the visual processing stream. Signals from the surround have been reported variously to be suppressive and facilitatory, s...
متن کاملSpatial attention effects in macaque area V4.
Focal visual attention typically produces enhanced perceptual processing at the psychological level and relatively stronger neural responses at the physiological level. A longstanding mechanistic question is whether these attentional effects pertain specifically to the attended (target) object or to the region of space it occupies. We show here that attentional response enhancement in macaque a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Cerebral Cortex
سال: 2002
ISSN: 1460-2199
DOI: 10.1093/cercor/12.6.601