The proprioceptive representation of eye position in monkey primary somatosensory cortex

Wang, Xiaolan; Zhang, Mingsha; Cohen, Ian S.; Goldberg, Michael E.

doi:10.1038/nn1878

Cited by 210 publications

(202 citation statements)

References 40 publications

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“…It is also important to point out that the gaze-centred remapping observations do not argue against the idea that these regions may also implicitly code their representations into other reference frames, using position signals of the eyes or other body parts, expressed in gain fields [47 -49] or muscle proprioception [50,51].…”

Section: Saccadic Updatingmentioning

confidence: 99%

Spatial constancy mechanisms in motor control

Medendorp

2011

Phil. Trans. R. Soc. B

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The success of the human species in interacting with the environment depends on the ability to maintain spatial stability despite the continuous changes in sensory and motor inputs owing to movements of eyes, head and body. In this paper, I will review recent advances in the understanding of how the brain deals with the dynamic flow of sensory and motor information in order to maintain spatial constancy of movement goals. The first part summarizes studies in the saccadic system, showing that spatial constancy is governed by a dynamic feed-forward process, by gaze-centred remapping of target representations in anticipation of and across eye movements. The subsequent sections relate to other oculomotor behaviour, such as eye -head gaze shifts, smooth pursuit and vergence eye movements, and their implications for feed-forward mechanisms for spatial constancy. Work that studied the geometric complexities in spatial constancy and saccadic guidance across head and body movements, distinguishing between self-generated and passively induced motion, indicates that both feed-forward and sensory feedback processing play a role in spatial updating of movement goals. The paper ends with a discussion of the behavioural mechanisms of spatial constancy for arm motor control and their physiological implications for the brain. Taken together, the emerging picture is that the brain computes an evolving representation of three-dimensional action space, whose internal metric is updated in a nonlinear way, by optimally integrating noisy and ambiguous afferent and efferent signals.

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Section: Saccadic Updatingmentioning

confidence: 99%

Spatial constancy mechanisms in motor control

Medendorp

2011

Phil. Trans. R. Soc. B

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“…Little is known about the temporal dynamics and the source of eye position signals. Eye position information may be provided by efference copy signals from oculomotor nuclei or alternatively by the proprioception of the eye muscles in providing eye position information [58,59].…”

Section: Perceptual and Physiological Phenomena Before And During Sacmentioning

confidence: 99%

Computational models of spatial updating in peri-saccadic perception

Hamker

Zirnsak

Ziesche

et al. 2011

Phil. Trans. R. Soc. B

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Perceptual phenomena that occur around the time of a saccade, such as peri-saccadic mislocalization or saccadic suppression of displacement, have often been linked to mechanisms of spatial stability. These phenomena are usually regarded as errors in processes of trans-saccadic spatial transformations and they provide important tools to study these processes. However, a true understanding of the underlying brain processes that participate in the preparation for a saccade and in the transfer of information across it requires a closer, more quantitative approach that links different perceptual phenomena with each other and with the functional requirements of ensuring spatial stability. We review a number of computational models of peri-saccadic spatial perception that provide steps in that direction. Although most models are concerned with only specific phenomena, some generalization and interconnection between them can be obtained from a comparison. Our analysis shows how different perceptual effects can coherently be brought together and linked back to neuronal mechanisms on the way to explaining vision across saccades.

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“…Also, intra-axonal injections of physiologically characterized EBNs in the squirrel monkey did not reveal axons that extend beyond the prepositus (Strassman et al 1986), although a polysynaptic connection cannot be excluded. Finally, some component of the observed head movement could have resulted from modulation of neck muscle activity as the eyes were driven to increasingly ipsilateral positions in the orbits (Vidal et al 1982;Andre-Deshays et al 1988;Corneil et al 2002;Wang et al 2007). …”

Section: Effectors Controlled By Pprf Neuronsmentioning

confidence: 99%

Coordination of eye and head components of movements evoked by stimulation of the paramedian pontine reticular formation

2008

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Constant frequency microstimulation of the paramedian pontine reticular formation (PPRF) in head-restrained monkeys evokes a constant velocity eye movement. Since the PPRF receives significant projections from structures that control coordinated eye-head movements, we asked whether stimulation of the pontine reticular formation in the head-unrestrained animal generates a combined eye-head movement or only an eye movement. Microstimulation of most sites yielded a constant-velocity gaze shift executed as a coordinated eye-head movement, although eye-only movements were evoked from some sites. The eye and head contributions to the stimulationevoked movements varied across stimulation sites and were drastically different from the lawful relationship observed for visually-guided gaze shifts. These results indicate that the microstimulation activated elements that issued movement commands to the extraocular and, for most sites, neck motoneurons. In addition, the stimulation-evoked changes in gaze were similar in the head-restrained and head-unrestrained conditions despite the assortment of eye and head contributions, suggesting that the vestibuloocular reflex (VOR) gain must be near unity during the coordinated eye-head movements evoked by stimulation of the PPRF. These findings contrast the attenuation of VOR gain associated with visually-guided gaze shifts and suggest that the vestibulo-ocular pathway processes volitional and PPRF stimulation-evoked gaze shifts differently.

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The proprioceptive representation of eye position in monkey primary somatosensory cortex

Cited by 210 publications

References 40 publications

Spatial constancy mechanisms in motor control

Spatial constancy mechanisms in motor control

Computational models of spatial updating in peri-saccadic perception

Coordination of eye and head components of movements evoked by stimulation of the paramedian pontine reticular formation

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