Visual Control of Locomotion

Fajen, Brett R.

doi:10.1017/9781108870474

Cited by 30 publications

(9 citation statements)

References 147 publications

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“…This task accordingly permits investigation of both how movement through the environment generates sensory cues useful for judging distance, and how the visual information is directly converted into a motor output. Furthermore, perception of spatial layout is an embodied process, and thus body- and action-scaling cues that are not available under conditions of restraint could provide distance information under the freely moving conditions of this task ( Fajen, 2021 ). Critically, natural behaviors may be the most appropriate tool for studying the neural basis of sensory processing since theoretical considerations suggest that neural circuits may perform suboptimal inference under non-natural conditions ( Beck et al, 2012 ).…”

Section: Discussionmentioning

confidence: 99%

Distance estimation from monocular cues in an ethological visuomotor task

Parker

Abe

Beatie

et al. 2022

eLife

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In natural contexts, sensory processing and motor output are closely coupled, which is reflected in the fact that many brain areas contain both sensory and movement signals. However, standard reductionist paradigms decouple sensory decisions from their natural motor consequences, and head-fixation prevents the natural sensory consequences of self-motion. In particular, movement through the environment provides a number of depth cues beyond stereo vision that are poorly understood. To study the integration of visual processing and motor output in a naturalistic task, we investigated distance estimation in freely moving mice. We found that mice use vision to accurately jump across a variable gap, thus directly coupling a visual computation to its corresponding ethological motor output. Monocular eyelid suture did not affect gap jumping success, thus mice can use cues that do not depend on binocular disparity and stereo vision. Under monocular conditions, mice altered their head positioning and performed more vertical head movements, consistent with a shift from using stereopsis to other monocular cues, such as motion or position parallax. Finally, optogenetic suppression of primary visual cortex impaired task performance under both binocular and monocular conditions when optical fiber placement was localized to binocular or monocular zone V1, respectively. Together, these results show that mice can use monocular cues, relying on visual cortex, to accurately judge distance. Furthermore, this behavioral paradigm provides a foundation for studying how neural circuits convert sensory information into ethological motor output.

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Section: Discussionmentioning

confidence: 99%

Distance estimation from monocular cues in an ethological visuomotor task

Parker

Abe

Beatie

et al. 2022

eLife

View full text Add to dashboard Cite

show abstract

“…This task accordingly permits investigation of both how movement through the environment generates sensory cues useful for judging distance, and how the visual information is directly converted into a motor output. Furthermore, perception of spatial layout is an embodied process, and thus body- and action-scaling cues that are not available under conditions of restraint could provide distance information under the freely moving conditions of this task (Fajen, 2021). Critically, natural behaviors may be the most appropriate tool for studying the neural basis of sensory processing, since theoretical considerations suggest that neural circuits may perform sub-optimal inference under non-natural conditions (Beck et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Distance estimation from monocular cues in an ethological visuomotor task

Parker

Abe

et al. 2021

Preprint

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In natural contexts, sensory processing and motor output are closely coupled, which is reflected in the fact that many brain areas contain both sensory and movement signals. However, standard reductionist paradigms decouple sensory decisions from their natural motor consequences, and head-fixation prevents the natural sensory consequences of self-motion. In particular, movement through the environment provides a number of depth cues beyond stereo vision that are poorly understood. To study the integration of visual processing and motor output in a naturalistic task, we investigated distance estimation in freely moving mice. We found that mice use vision to accurately jump across a variable gap, thus directly coupling a visual computation to its corresponding ethological motor output. Monocular eyelid suture did not affect performance, thus mice can use cues that do not depend on binocular disparity and stereo vision. Under monocular conditions, mice performed more vertical head movements, consistent with the use of motion parallax cues, and optogenetic suppression of primary visual cortex impaired task performance. Together, these results show that mice can use monocular cues, relying on visual cortex, to accurately judge distance. Furthermore, this behavioral paradigm provides a foundation for studying how neural circuits convert sensory information into ethological motor output.

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“…Both Zhao and Warren (2015) and Fajen (2021) have reviewed and critiqued the idea that internal models are used in visually guided locomotion, arguing instead for control using prospective information. However, in their critiques, they did not address the instability of control in the context of delays from neural transmission times used as an argument for internal models.…”

Section: Representations As the Basis Of Stable Movementsmentioning

confidence: 99%

Time for Space and the Stability of Prospective Control: Reaching-to-Grasp Gibson

Bingham

2021

i-Perception

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Gibson formulated an approach to goal-directed behavior using prospective information in the context of visually guided locomotion and manual behavior. The former was Gibson's paradigm case, but it is the rapidity of targeted reaching that has provided the special challenge for stable control. Recent treatments of visually guided reaching assume that internal forward models are required to generate stable behavior given delays caused by neural transmission times. Internal models are representations of the sort eschewed by Gibson in favor of prospective information. Reaching is usually described as guided using relative distances of hand and target, but prospective information is usually temporal rather than spatial. We describe proportional rate control models that incorporate time dimensioned prospective information and show they remain stable in the face of delays. The use of time-dimensioned prospective information removes the need for internal models for stable behavior despite neural transmission delays and allows Gibson's approach to prevail.

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Visual Control of Locomotion

Cited by 30 publications

References 147 publications

Distance estimation from monocular cues in an ethological visuomotor task

Distance estimation from monocular cues in an ethological visuomotor task

Distance estimation from monocular cues in an ethological visuomotor task

Time for Space and the Stability of Prospective Control: Reaching-to-Grasp Gibson

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