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Related Concept Videos

Position and Displacement Vectors01:00

Position and Displacement Vectors

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To describe the motion of an object, one should first be able to describe its position (where it is at any particular time). More precisely, the position needs to be specified relative to a convenient frame of reference. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference to describe the position of an object in relation to stationary objects on Earth.
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Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex.
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Significance of Displacement Current01:27

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A displacement current is analogous to a real current in Ampère's law, participating in Ampère's law the same way as the usual conduction current. However, it is produced by a changing electric field. Displacement current is defined in terms of a time-varying electric field, and also has an associated displacement current density. By adding a term accounting for displacement current, Maxwell modified the existing Ampère's law, which is now called generalized Ampère's law.
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Angular Velocity and Displacement01:08

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Uniform circular motion is motion in a circle at a constant speed. Although this is the simplest case of rotational motion, it is very useful for many situations and is used to introduce rotational variables. When a particle is moving in a circle, the coordinate system is fixed and serves as a frame of reference to define the particle’s position. Its position vector from the origin of the circle to the particle sweeps out the angle θ, which increases in the counterclockwise direction...
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Related Experiment Video

Updated: Jan 30, 2026

Tactile Conditioning And Movement Analysis Of Antennal Sampling Strategies In Honey Bees Apis mellifera L.
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Tactile Conditioning And Movement Analysis Of Antennal Sampling Strategies In Honey Bees Apis mellifera L.

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Dynamic Displacement Vector Interacts with Tactile Localization.

Lucile Dupin1, Patrick Haggard1

  • 1Institute of Cognitive Neuroscience, University College London, London WC1N 3AR, UK.

Current Biology : CB
|January 29, 2019
PubMed
Summary
This summary is machine-generated.

Movement influences where we feel touch. A dynamic displacement vector, based on successive actions, significantly alters tactile localization perception, even when the moving body part is distant from the stimulation site.

Keywords:
attentionhumanmovementspatial perceptiontactile localizationtouch

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Area of Science:

  • Neuroscience
  • Somatosensory system
  • Perception

Background:

  • Tactile localization is generally perceived as accurate.
  • However, perceived tactile location can deviate from physical location due to various factors.
  • These include timing of stimuli, motion mechanisms, and spatial remapping processes.

Purpose of the Study:

  • To investigate how the displacement between successive actions affects tactile localization on a static body part.
  • To determine the role of dynamic displacement vectors in tactile spatial perception.

Main Methods:

  • Six experiments were conducted involving participants performing finger movements between keys.
  • Each keypress triggered synchronous tactile stimulation on the wrist or forehead.
  • Participants reported the perceived location of the second tactile stimulus relative to the first.

Main Results:

  • The direction of active or passive finger movements biased tactile orientation judgments.
  • This effect generalized across different body sites and was observed even with distant hand movements.
  • Temporal synchrony within 600 ms between movement and tactile stimulation was crucial.

Conclusions:

  • A dynamic displacement vector, defined by the relationship between successive sensorimotor events, strongly influences tactile spatial perception.
  • This suggests that the brain integrates movement information to construct the sense of touch location.