Perceptual Centering Effects in Body Orientation

Hanes, David A.

doi:10.1007/s00422-005-0048-2

Cited by 5 publications

(8 citation statements)

References 11 publications

(43 reference statements)

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“…This experiment demonstrates a large response space of perceptions, and subsequent work has related the results to perceptual transformations. The perceptions can be explained mathematically by sequences of physiological perception transformations, which form a semigroup that mathematically characterizes the perceptual dynamics [27]. Each transformation takes an orientation to another orientation that is more centered, in the sense explained in the previous paragraph.…”

Section: Rotating Diskmentioning

confidence: 99%

Constructive perception of self-motion

Holly

McCollum

2009

VES

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This review focusses attention on a ragged edge of our knowledge of self-motion perception, where understanding ends but there are experimental results to indicate that present approaches to analysis are inadequate. Although self-motion perception displays processes of "top-down" construction, it is typically analyzed as if it is nothing more than a deformation of the stimulus, using a "bottom-up" and input/output approach beginning with the transduction of the stimulus. Analysis often focusses on the extent to which passive transduction of the movement stimulus is accurate. Some perceptual processes that deform or transform the stimulus arise from the way known properties of sensory receptors contribute to perceptual accuracy or inaccuracy. However, further constructive processes in self-motion perception that involve discrete transformations are not well understood. We introduce constructive perception with a linguistic example which displays familiar discrete properties, then look closely at self-motion perception. Examples of self-motion perception begin with cases in which constructive processes transform particular properties of the stimulus. These transformations allow the nervous system to compose whole percepts of movement; that is, self-motion perception acts at a whole-movement level of analysis, rather than passively transducing individual cues. These whole-movement percepts may be paradoxical. In addition, a single stimulus may give rise to multiple perceptions. After reviewing self-motion perception studies, we discuss research methods for delineating principles of the constructed perception of self-motion. The habit of viewing self-motion illusions only as continuous deformations of the stimulus may be blinding the field to other perceptual phenomena, including those best characterized using the mathematics of discrete transformations or mathematical relationships relating sensory modalities in novel, sometimes discrete ways. Analysis of experiments such as these is required to mathematically formalize elements of self-motion perception, the transformations they may undergo, consistency principles, and logical structure underlying multiplicity of perceptions. Such analysis will lead to perceptual rules analogous to those recognized in visual perception.

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Section: Rotating Diskmentioning

confidence: 99%

Constructive perception of self-motion

Holly

McCollum

2009

VES

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“…We argue that the illusory weight change in our study is related to this type of illusory self-acceleration. Consistent with this notion, Hanes ( 6 ) reported that when a subject views an optokinetic stimulus, his or her perception of inertial self-motion is often changed to accord with the perceived (in this case, actually sensed) visual motion (p. 252). However, it would also be interesting for future studies to compare and contrast the vection and perceived weight changes obtained using our constant velocity self-motion displays to those generated by displays simulating vertical self-accelerations.…”

Section: Discussionmentioning

confidence: 70%

Perceived Gravitoinertial Force During Vection

Seno¹,

Palmisano²,

Ito³

et al. 2013

Aviation, Space, and Environmental Medicine

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“…It is likely therefore to be involved in the vection illusions caused by a tilted rotating disk (DiZio and Lackner 1986;Hanes 2006). Subjects experienced illusions of body position, including head tilt and gaze direction, which reoriented the rotating disk to a horizontal position (Fig.…”

Section: The Symmetry Group and Functions Of The Uvula-nodulusmentioning

confidence: 98%

Spatial symmetries in vestibular projections to the uvula-nodulus

et al. 2007

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The discharge of secondary vestibular neurons relays the activity of the vestibular endorgans, occasioned by movements in three-dimensional physical space. At a slightly higher level of analysis, the discharge of each secondary vestibular neuron participates in a multifiber projection or pathway from primary afferents via the secondary neurons to another neuronal population. The logical organization of this projection determines whether characteristics of physical space are retained or lost. The logical structure of physical space is standardly expressed in terms of the mathematics of group theory. The logical organization of a projection can be compared to that of physical space by evaluating its symmetry group. The direct projection from the semicircular canal nerves via the vestibular nuclei to neck motor neurons has a full three-dimensional symmetry group, allowing it to maintain a three-dimensional coordinate frame. However, a projection may embed only a subgroup of the symmetry group of physical space, which incompletely mirrors the properties of physical space. The major visual and vestibular projections in the rabbit via the inferior olive to the uvula-nodulus carry three degrees of freedom-rotations about one vertical and two horizontal axes-but do not have full three dimensional symmetry. Instead, the vestibulo-olivo-nodular projection has symmetries corresponding to a product of two-dimensional vestibular and one-dimensional optokinetic spaces. This combination of projection symmetries provides the foundation for distinguishing horizontal from vertical rotations within a three dimensional space. In this study, we evaluate the symmetry group given by the physiological organization of the vestibulo-olivo-nodular projection. Although it acts on the same sets of elements and mirrors the rotations that occur in physical space, the physiological transformation group is distinct from the spatial group. We identify symmetries as products of physiological and spatial transformations. The symmetry group shapes the information the projection conveys to the uvula-nodulus; this shaping may depend on a physiological choice of generators, in the same way that function depends on the physiological choice of coordinates. We discuss the implications of the symmetry group for uvula-nodulus function, evolution, and functions of the vestibular system in general.

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Perceptual Centering Effects in Body Orientation

Cited by 5 publications

References 11 publications

Constructive perception of self-motion

Constructive perception of self-motion

Perceived Gravitoinertial Force During Vection

Spatial symmetries in vestibular projections to the uvula-nodulus

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