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Related Concept Videos

Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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The center of gravity of a body is an imaginary point where the body's total weight is assumed to be concentrated, and the body is perfectly balanced. The center of the mass of a body is a point at which the whole of the mass of the body appears to be concentrated. If the acceleration due to gravity, g, has the same value at all points on a body, its center of gravity is identical to its center of mass. The center of gravity of homogeneous bodies such as a sphere, cube, or rectangular plate is...
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Center of Gravity00:58

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The center of gravity (COG) of an object is the point where the object's total weight is considered to be concentrated. Knowing the location of the center of gravity is useful when predicting the behavior of a moving object or designing static structures. In a uniform gravitational field, the center of gravity is similar to the center of mass (COM); yet, these two points can be positioned differently. For example, the Moon's center of mass lies very close to its geometric center, but its center...
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Assessment of Static Graviceptive Perception in the Roll-Plane using the Subjective Visual Vertical Paradigm
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Published on: April 28, 2020

Influence of uninformative visual cues on gravity perception.

Aleksandra Kupferberg1, Stefan Glasauer, Alexandra Stein

  • 1Institute for Clinical Neurosciences, Ludwig-Maximilians University, Munich, Germany. Alexandra.Kupferberg@gmx.de

Annals of the New York Academy of Sciences
|August 4, 2009
PubMed
Summary
This summary is machine-generated.

The subjective visual zenith (SVZ), or sense of up, is affected by sensory cues. A gravity-unrelated visual cue was memorized and used as a reference for SVZ in most participants.

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Area of Science:

  • Neuroscience
  • Human Perception
  • Vestibular System

Background:

  • Subjective visual zenith (SVZ) perception integrates vestibular, visual, and internal prior information (idiotropic vector).
  • The idiotropic vector represents prior knowledge of self-orientation relative to gravity.
  • Understanding influences on SVZ is crucial for fields like aviation and virtual reality.

Purpose of the Study:

  • To investigate how a subject-fixed, gravity-uninformative visual cue affects SVZ settings.
  • To determine if such cues are memorized and utilized as orientation references.

Main Methods:

  • Participants' SVZ was measured at various pitch angles.
  • A visual cue, not aligned with gravity, was introduced.
  • The influence of this cue on SVZ was analyzed across trials.

Main Results:

  • Most participants' SVZ was significantly influenced by the gravity-unrelated visual cue.
  • This influence suggests the cue's orientation was learned and retained.
  • The memorized cue served as a reference for subjective orientation.

Conclusions:

  • Subjective visual zenith is adaptable and can be recalibrated by non-gravitational visual references.
  • The brain can memorize and utilize arbitrary visual cues for spatial orientation.
  • This finding has implications for understanding spatial cognition and sensory integration.