Anticipatory Remapping of Attentional Priority across the Entire Visual Field

Mirpour, Koorosh; Bisley, James W.

doi:10.1523/jneurosci.2008-12.2012

Cited by 46 publications

(67 citation statements)

References 49 publications

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“…First, populations of gain-field neurons with a retinotopic receptive field scale their activity with the angle of gaze to encode visual location relative to the body and/or the world (Pouget et al, 2002;Andersen & Mountcastle, 1983). A second mechanism is remapping of the retinotopic receptive field to account for eye movements (Mirpour & Bisley, 2012;Duhamel et al, 1992). A role of oculoproprioception in coding the locus of attention is compatible with both these mechanisms.…”

Section: A Role Of Oculoproprioception In Coding the Locus Of Attentimentioning

confidence: 99%

Role of Oculoproprioception in Coding the Locus of Attention

Odoj

Balslev

2015

Journal of Cognitive Neuroscience

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Abstract■ The most common neural representations for spatial attention encode locations retinotopically, relative to center of gaze. To keep track of visual objects across saccades or to orient toward sounds, retinotopic representations must be combined with information about the rotation of one's own eyes in the orbits. Although gaze input is critical for a correct allocation of attention, the source of this input has so far remained unidentified. Two main signals are available: corollary discharge (copy of oculomotor command) and oculoproprioception (feedback from extraocular muscles). Here we asked whether the oculoproprioceptive signal relayed from the somatosensory cortex contributes to coding the locus of attention. We used continuous theta burst stimulation (cTBS) over a human oculoproprioceptive area in the postcentral gyrus (S1 EYE ). S1 EYE -cTBS reduces proprioceptive processing, causing ∼1°underestimation of gaze angle. Participants discriminated visual targets whose location was cued in a nonvisual modality. Throughout the visual space, S1 EYE -cTBS shifted the locus of attention away from the cue by ∼1°, in the same direction and by the same magnitude as the oculoproprioceptive bias. This systematic shift cannot be attributed to visual mislocalization. Accuracy of open-loop pointing to the same visual targets, a function thought to rely mainly on the corollary discharge, was unchanged. We argue that oculoproprioception is selective for attention maps. By identifying a potential substrate for the coupling between eye and attention, this study contributes to the theoretical models for spatial attention. ■

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Section: A Role Of Oculoproprioception In Coding the Locus Of Attentimentioning

confidence: 99%

Role of Oculoproprioception in Coding the Locus of Attention

Odoj

Balslev

2015

Journal of Cognitive Neuroscience

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“…Moreover, if remapped responses are compared with reafferent responses, it would seem advantageous for the future field and receptive field to respond identically to visual stimuli. The predictions seem to be confirmed for LIP, where some neurons have remapped responses with visual tuning similar to their receptive field tuning (Mirpour and Bisley 2012;Subramanian and Colby 2014). However, the degree of similarity is difficult to quantify because the retinal eccentricity corresponding to the future field and receptive field will generally be different, so that the two fields may "see" images at different visual acuity.…”

Section: Behavioral Implications Of Remappingmentioning

confidence: 75%

Circuits for presaccadic visual remapping

Rao

Mayo

Sommer

2016

Journal of Neurophysiology

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Saccadic eye movements rapidly displace the image of the world that is projected onto the retinas. In anticipation of each saccade, many neurons in the visual system shift their receptive fields. This presaccadic change in visual sensitivity, known as remapping, was first documented in the parietal cortex and has been studied in many other brain regions. Remapping requires information about upcoming saccades via corollary discharge. Analyses of neurons in a corollary discharge pathway that targets the frontal eye field (FEF) suggest that remapping may be assembled in the FEF's local microcircuitry. Complementary data from reversible inactivation, neural recording, and modeling studies provide evidence that remapping contributes to transsaccadic continuity of action and perception. Multiple forms of remapping have been reported in the FEF and other brain areas, however, and questions remain about the reasons for these differences. In this review of recent progress, we identify three hypotheses that may help to guide further investigations into the structure and function of circuits for remapping. eye movements; perception; remapping; saccades; vision WE PERCEIVE THE ENVIRONMENT as continuous, but neurons in the brain take samples that are constrained in space and time. Specific ranges of stimuli drive a neuron to produce action potentials. From the 1960s through the 1970s, it was essentially dogma that the stimulus-spike relationship of a sensory neuron revealed its "receptive field," the portion of the world to which a sensory neuron responds. Response gain could be modulated by internal factors such as attention or external factors such as contrast, but the structure of receptive fields seemed immutable and their function, to report what is out there, seemed passive. In the case of the visual system, neurons were assumed to have static receptive fields relative to the fovea.Evidence for exceptions to this rule emerged in the 1980s, and the dogma was overturned in the 1990s, when behaving animal preparations allowed for studies in which eye movements were incorporated as factors in experimental design. It became clear that around the time of saccades the spatial structure of receptive fields can change. Here we summarize the advances in our understanding of labile receptive field location with a focus on circuit-level studies from the past 20 years. Progress has been made in elucidating the mechanisms of receptive field remapping both at the macrocircuit level (pathways between brain areas) and the microcircuit level (processing within brain areas). Recent physiological and modeling experiments have leveraged this circuit information to explore the visuomotor and perceptual functions of remapping. Taken together, a new picture of the genesis and role of presaccadic remapping emerges, yielding testable hypotheses for future work. Presaccadic Visual RemappingThe first hint that visual receptive fields can be spatially dynamic was reported by Mays and Sparks (1980) in a study of neurons located in the intermediate...

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“…This substantial shift of neural resources to the ST may explain the severe drop in visual performance observed in the current study, but it does not account for the enhancement of performance at the remapped location. Second, LIP neurons that will encode unattended or empty locations after the saccade predictively decrease their activity (Mirpour and Bisley 2012). Critically, this finding was made in a visual search task, which requires the voluntary control of visual attention to keep track of previously attended and unattended locations.…”

Section: Discussionmentioning

confidence: 99%

“…With the use of a corollary discharge signal (Holst and Mittelstaedt 1950;Sperry 1950) of the imminent saccade motor program (Sommer and Wurtz 2002), visuomotor areas of the brain appear to shift priorities to process the object's future retinal location (Duhamel et al 1992;Gottlieb et al 1998;Merriam et al 2003;Mirpour and Bisley 2012). This "remapping" allows the maintenance of an attention pointer at the relevant position in space, despite changes in retinal coordinates due to the upcoming saccade (Cavanagh et al 2010;Rolfs et al 2011;Jonikaitis et al 2013).…”

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confidence: 99%