Spatial Position Information Accumulates Steadily over Time

Zimmermann, Eckart; Morrone, Maria Concetta; Burr, David

doi:10.1523/jneurosci.1864-13.2013

Cited by 55 publications

(71 citation statements)

References 43 publications

(5 reference statements)

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“…The effect of task condition on saccade latency, amplitude, and velocity measures may imply that participants in this experiment prioritized speed over accuracy in their performance of the saccade task. Spending more time preparing a saccade leads to better performance on displacement detection tasks (Zimmermann, Morrone, & Burr, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…Several other recent studies are consistent with the conclusion that VWM supports the perception of stability across saccades. For example, visual factors that affect the quality of the representation of the saccade target in memory, such as contrast (Matsumiya, Sato, & Shioiri, 2016), preview duration (Zimmermann, Morrone, & Burr, 2013), and size (Zimmermann, 2016) have been shown to affect displacement perception across saccades.…”

Section: Chapter 8: General Discussionmentioning

confidence: 99%

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Visual working memory supports perceptual stability across saccadic eye movements.

Cronin¹,

Irwin²

2018

Journal of Experimental Psychology: Human Perception and Perfor

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Vision is suppressed during saccadic eye movements. To create a stable perception of the visual world we must compensate for the gaps in visual input caused by this suppression. Some theories of perceptual stability, such as the Saccade Target Object Theory (McConkie & Currie, 1996), propose that stability relies on object correspondence across saccades. According to these views, the visual system encodes features of the saccade target into visual working memory (VWM) before a saccade is made. After the saccade, participants attempt to locate those features within a small region near the fovea. If this locating process succeeds, perceptual stability is maintained. The present study investigated directly whether perceptual stability relies on VWM. If it does, perceived stability should be impaired when VWM is loaded with other visual information. Participants detected saccade target displacements while simultaneously maintaining a VWM or verbal working memory (AWM) load. In three experiments, a VWM load negatively impacted participants' ability to detect saccade target displacements and the saccade target displacement task negatively impacted memory for VWM task items. Neither of these effects were apparent when AWM was loaded, suggesting that performance on VWM and saccade target displacement detection tasks, and thus perceptual stability, relies on VWM resources. (PsycINFO Database Record (c) 2018 APA, all rights reserved).

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Section: Discussionmentioning

confidence: 99%

Section: Chapter 8: General Discussionmentioning

confidence: 99%

Visual working memory supports perceptual stability across saccadic eye movements.

Cronin¹,

Irwin²

2018

Journal of Experimental Psychology: Human Perception and Perfor

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show abstract

“…More recently, Rand and Shimansky (2013) have modeled reaching movements in terms of progressively refined control. The progressive refinement of motor control could be due in part to the accumulation of spatial position information over time as suggested by Zimmermann et al (2013). Given the time requirements of the present task (i.e., completion within 2 sec), the subject may have initiated movement before fully localizing the target and programming the movement.…”

Section: Discussionmentioning

confidence: 99%

Effects of training pre-movement sensorimotor rhythms on behavioral performance

McFarland

Sarnacki²,

Wolpaw³

2015

J. Neural Eng.

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Brain–computer interface (BCI) technology might contribute to rehabilitation of motor function. This speculation is based on the premise that modifying the EEG will modify behavior, a proposition for which there is limited empirical data. The present study asked whether learned modulation of pre-motor sensorimotor rhythm (SMR) activity can affect motor performance in normal human subjects. Eight individuals first performed a joystick-based cursor-movement task with variable warning periods. Targets appeared randomly on a video monitor and subjects moved the cursor to the target and pressed a select button within 2 sec. SMR features in the pre-movement EEG that correlated with performance speed and accuracy were identified. The subjects then learned to increase or decrease these features to control a two-target BCI task. Following successful BCI training, they were asked to increase or decrease SMR amplitude in order to initiate the joystick task. After BCI training, pre-movement SMR amplitude was correlated with performance in subjects with initial poor performance: lower amplitude was associated with faster and more accurate movement. The beneficial effect on performance of lower SMR amplitude was greater in subjects with lower initial performance levels. These results indicate that BCI-based SMR training can affect a standard motor behavior. They provide a rationale for studies that integrate such training into rehabilitation protocols and examine its capacity to enhance restoration of useful motor function.

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“…This phenomenon has been termed saccadic suppression of displacement. We have recently shown that performance in this paradigm drastically improves if the visual system has time to build up a stable representation of the saccade target location (Zimmermann et al, 2013). The longer participants had seen the saccade target before executing the saccade, the better they were able to discriminate the displacement direction.…”

Section: Introductionmentioning

confidence: 99%

Spatiotopic buildup of saccade target representation depends on target size

Zimmermann

2016

Journal of Vision

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How we maintain spatial stability across saccade eye movements is an open question in visual neuroscience. A phenomenon that has received much attention in the field is our seemingly poor ability to discriminate the direction of transsaccadic target displacements. We have recently shown that discrimination performance increases the longer the saccade target has been previewed before saccade execution (Zimmermann, Morrone, & Burr, 2013). We have argued that the spatial representation of briefly presented stimuli is weak but that a strong representation is needed for transsaccadic, i.e., spatiotopic localization. Another factor that modulates the representation of saccade targets is stimulus size. The representation of spatially extended targets is more noisy than that of point-like targets. Here, I show that the increase in transsaccadic displacement discrimination as a function of saccade target preview duration depends on target size. This effect was found for spatially extended targets-thus replicating the results of Zimmermann et al. (2013)-but not for point-like targets. An analysis of saccade parameters revealed that the constant error for reaching the saccade target was bigger for spatially extended than for point-like targets, consistent with weaker representation of bigger targets. These results show that transsaccadic displacement discrimination becomes accurate when saccade targets are spatially extended and presented longer, thus resembling closer stimuli in real-world environments.

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Spatial Position Information Accumulates Steadily over Time

Cited by 55 publications

References 43 publications

Visual working memory supports perceptual stability across saccadic eye movements.

Visual working memory supports perceptual stability across saccadic eye movements.

Effects of training pre-movement sensorimotor rhythms on behavioral performance

Spatiotopic buildup of saccade target representation depends on target size

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