The brain topography associated with active reversal and suppression of an ambiguous figure

Abstract

Ayis Pyrros (2005) The brain topography associated with active reversal and suppression of an ambiguous figure, European Journal of Cognitive Psychology, 17:2, 267-288,

Neural Mechanisms for Binocular Depth, Rivalry and Multistability

“…Other depth studies used methods more similar to those used for binocular rivalry, such as multivoxel pattern analysis [8], event-related adaptation [15], event-related designs in which brain activation was correlated to changes in perceived depth [5,16], or adaptation in a block design to assess population responsiveness to different types of depth stimuli [14]. These differences in methodology also mean that subjects performed a task in rivalry or multistabiity studies using event-related designs [5,19,20,22,[28][29][30]32,33,36], or block designs [1,2,26,31,34,35], but subjects did not perform tasks in depth studies [3,6,[9][10][11][12][13]17], although there are a few exceptions to this generalization for depth [2,4,5,7,17]. Also, a few rivalry or multistability studies did not use a task [21,37,61], and some rivalry studies used fixation tasks unrelated to the perception of rivalry [23,28].…”

“…In general, multistability studies have used methods which are quite similar to those used in rivalry studies. For example, a large number of multistability studies used event-related designs correlating brain activation to reversals [29,30,32,33,36], while others used block designs comparing multistability to baseline conditions [31,34,35,37], or multivariate pattern analysis to predict perceptual states [38].…”

“…Thus, the effect of attention is to modulate neural activity in visual areas, while the control of attention has been associated with transient activity in frontal and parietal cortex that occurs at the onset of attentional switches [65,70], in addition to sustained activity in these areas that maintains a given attentive state. Studies of the voluntary control of ambiguous figure reversals have also revealed transient frontoparietal activation, suggesting that there may be a common mechanism subserving the voluntary deployment of attention and voluntary control over perceptual bistability [32,34].…”

“…These parietal areas included superior parietal lobe [1,19,30,32,[34][35][36][37][38], intraparietal sulcus [1,19,29,30,[32][33][34][35][36][37][38] and temporoparietal junction [19,29,30,32,33,[35][36][37]. The frontal sites of activation which also could be related to attention included dorsolateral prefrontal cortex or middle frontal gyrus [1,19,31,32,[34][35][36], ventrolateral prefrontal cortex or inferior frontal gyrus [1,19,30,33]. Again, as was seen earlier for rivalry, a number of frontal areas were present which could be associated with attention or the preparation and execution of motor reports, such as frontal eye fields, anterior cingulate [1,19,29,[30][31][32]…”

“…The frontal sites of activation which also could be related to attention included dorsolateral prefrontal cortex or middle frontal gyrus [1,19,31,32,[34][35][36], ventrolateral prefrontal cortex or inferior frontal gyrus [1,19,30,33]. Again, as was seen earlier for rivalry, a number of frontal areas were present which could be associated with attention or the preparation and execution of motor reports, such as frontal eye fields, anterior cingulate [1,19,29,[30][31][32][33][34] and supplementary motor area [1,33,35,36]. These frontal and parietal areas were the most frequently reported sites of activation in these studies.…”