The organization of spatial frequency maps measured by cortical flavoprotein autofluorescence

Mallik, Atul K.; Husson, T. Robert; Zhang, Jing X.; Rosenberg, Ari; Issa, Naoum P.

doi:10.1016/j.visres.2008.04.014

Cited by 9 publications

(6 citation statements)

References 27 publications

(55 reference statements)

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“…Such a relationship is regarded as a way to achieve uniform coverage, so that all combinations of respective parameters are equally represented across the cortical surface (Swindale et al, 2000). A model with orientation pinwheel centers located at the center of domains coding for extreme SFs is consistent with this view (Issa et al, 2000(Issa et al, , 2008. In contrast, our data indicates that isoorientation and iso-SF lines tend to run parallel to each other.…”

Section: Spatial Frequency and Orientation Maps Underlie The Same Funsupporting

confidence: 90%

“…It is characterized by the coexistence of a global anteroposterior gradient and local patches typical of the representation of other visual attributes such as orientation. In A17, the existence of such patches is consistent with previous optical imaging studies Everson et al, 1998;Issa et al, 2000;Mallik et al, 2008;Tani et al, 2012). In A18, the present study extends and provides further detail to the recent observation that SFs of 0.15, 0.08, and 0.04 cpd preferentially activate different cortical locations (Tani et al, 2012).…”

Section: Existence Of Spatial Frequency Maps In Visual Cortexsupporting

confidence: 90%

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Organization and Origin of Spatial Frequency Maps in Cat Visual Cortex

et al. 2013

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It remains controversial whether and how spatial frequency (SF) is represented tangentially in cat visual cortex. Several models were proposed, but there is no consensus. Worse still, some data indicate that the SF organization previously revealed by optical imaging techniques simply reflects non-stimulus-specific responses. Instead, stimulus-specific responses arise from the homogeneous distribution of geniculo-cortical afferents representing X and Y pathways. To clarify this, we developed a new imaging method allowing rapid stimulation with a wide range of SFs covering more than 6 octaves with only 0.2 octave resolution. A benefit of this method is to avoid error of high-pass filtering methods which systematically under-represent dominant selectivity features near pinwheel centers. We show unequivocally that SF is organized into maps in cat area 17 (A17) and area 18 (A18). The SF organization in each area displays a global anteroposterior SF gradient and local patches. Its layout is constrained to that of the orientation map, and it is suggested that both maps share a common functional architecture. A17 and A18 are bound at the transition zone by another SF gradient involving the geniculocortical and the callosal pathways. A model based on principal component analysis shows that SF maps integrate three different SFdependent channels. Two of these reflect the segregated excitatory input from X and Y geniculate cells to A17 and A18. The third one conveys a specific combination of excitatory and suppressive inputs to the visual cortex. In a manner coherent with anatomical and electrophysiological data, it is interpreted as originating from a subtype of Y geniculate cells.

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Section: Spatial Frequency and Orientation Maps Underlie The Same Funsupporting

confidence: 90%

Section: Existence Of Spatial Frequency Maps In Visual Cortexsupporting

confidence: 90%

Organization and Origin of Spatial Frequency Maps in Cat Visual Cortex

et al. 2013

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“…Another recent optical imaging study refuted the idea of a columnar organization for spatial frequency preference (Sirovich & Uglesich, 2004). Finally, a latest autofluorescence imaging study confirmed the existence of the spatial frequency map (Mallik et al, 2008). The present results are in agreement with the existence of spatial modulations of the preferred spatial frequency in area 17.…”

Section: Organization Of Spatial Frequency Preferencesupporting

confidence: 87%

Parallel development of orientation maps and spatial frequency selectivity in cat visual cortex

Tani

Ribot

Ohashi

et al. 2012

Eur J of Neuroscience

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In an early stage of the postnatal development of cats, orientation maps mature and spatial frequency selectivity is consolidated. To investigate the time course of orientation map maturation associated with the consolidation of spatial frequency selectivity, we performed optical imaging of intrinsic signals in areas 17 and 18 of cats under the stimulation of drifting square-wave gratings with different orientations and spatial frequencies. First, orientation maps for lower spatial frequencies emerged in the entire part of the lateral gyrus, which includes areas 17 and 18, and then these orientation maps in the posterior part of the lateral gyrus disappeared as orientation maps for higher spatial frequencies matured. Independent of age, an anteroposterior gradient of response strengths from lower to higher spatial frequencies was observed. This indicates that the regional distribution of spatial frequencies is innately determined. The size of iso-orientation domains tended to decrease as the stimulus spatial frequency increased at every age examined. In contrast, orientation representation bias changed with age. In cats younger than 3 months, the cardinal (vertical and horizontal) orientations were represented predominantly over the oblique orientations. However, in young adult cats from 3 to 9 months old, the representation bias switched to predominantly oblique orientations. These age-dependent changes in the orientation representation bias imply that orientation maps continue to elaborate within postnatal 1 year with the consolidation of spatial frequency selectivity. We conclude that both intrinsic and mutual factors lead to the development of orientation maps and spatial frequency selectivity.

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“…Thus, in the present study, the contribution of the hemodynamic coupling in the overestimation of optimal diameter values has been limited. Interestingly, the recent advances made in the field of flavoprotein autofluorescence functional imaging could provide an alternate, and more specific, method to confirm the existence of this new cortical organization in the future (Husson et al, 2007; Mallik et al, 2008; Sirotin and Das, 2010). …”

Section: Discussionmentioning

confidence: 99%

Surround suppression maps in the cat primary visual cortex

Vanni

Casanova

2013

Front. Neural Circuits

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In the primary visual cortex and higher-order areas, it is well known that the stimulation of areas surrounding the classical receptive field of a neuron can inhibit its responses. In the primate area middle temporal (MT), this surround suppression was shown to be spatially organized into high and low suppression modules. However, such an organization has not been demonstrated yet in the primary visual cortex. Here, we used optical imaging of intrinsic signals to spatially evaluate surround suppression in the cat visual cortex. The magnitude of the response was measured in areas 17 and 18 for stimuli with different diameters, presented at different eccentricities. Delimited regions of the cortex were revealed by circumscribed stimulations of the visual field (“cortical response field”). Increasing the stimulus diameter increased the spread of cortical activation. In the cortical response field, the optimal stimulation diameter and the level of suppression were evaluated. Most pixels (≥3/4) exhibited surround suppression profiles. The optimal diameter, corresponding to a population of receptive fields, was smaller in area 17 (22°) than in area 18 (36°) in accordance with electrophysiological data. No difference in the suppression strength was observed between both areas (A17: 25%, A18: 21%). Further analysis of our data revealed the presence of surround modulation maps, organized in low and high suppression domains. We also developed a statistical method to confirm the existence of this cortical map and its neuronal origin. The organization for center/surround suppression observed here at the level of the primary visual cortex is similar to those found in higher order areas in primates (e.g., area MT) and could represent a strategy to optimize figure ground discrimination.

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The organization of spatial frequency maps measured by cortical flavoprotein autofluorescence

Cited by 9 publications

References 27 publications

Organization and Origin of Spatial Frequency Maps in Cat Visual Cortex

Organization and Origin of Spatial Frequency Maps in Cat Visual Cortex

Parallel development of orientation maps and spatial frequency selectivity in cat visual cortex

Surround suppression maps in the cat primary visual cortex

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