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Related Concept Videos

Orthogonal Trajectories01:26

Orthogonal Trajectories

Orthogonal trajectories describe the geometric relationship between two families of curves that intersect each other at right angles. One illustrative case involves a family of parabolas that open sideways along the x-axis. These curves share a common shape but differ by a scaling parameter, resulting in a set of curves that all pass through the origin and widen at different rates.Determining Orthogonal TrajectoriesTo identify the orthogonal trajectories for these parabolas, the first step...
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Vector Components in the Cartesian Coordinate System

Vectors are usually described in terms of their components in a coordinate system. Even in everyday life, we naturally invoke the concept of orthogonal projections in a rectangular coordinate system. For example, if someone gives you directions for a particular location, you will be told to go a few km in a direction like east, west, north, or south, along with the angle in which you are supposed to move. In a rectangular (Cartesian) xy-coordinate system in a plane, a point in a plane is...
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Vectors in Space: Problem Solving

A chandelier suspended by multiple cables can be analyzed using principles of three-dimensional static equilibrium. In this setup, a chandelier weighing 1000 N is positioned at the origin of a three-dimensional coordinate system, while three ceiling anchor points are fixed at known locations above it. Each cable connects the chandelier to one anchor point and transmits a tensile force along its length.To find out the forces in the cables, the spatial direction of each cable must first be...
Polar and Cylindrical Coordinates01:22

Polar and Cylindrical Coordinates

The Cartesian coordinate system is a very convenient tool to use when describing the displacements and velocities of objects and the forces acting on them. However, it becomes cumbersome when we need to describe the rotation of objects. So, when describing rotation, the polar coordinate system is generally used.
Vectors in 2D: Problem Solving01:29

Vectors in 2D: Problem Solving

A plane traveling due north at 180 km/h in still air was found to be 80 km off-course after 30 minutes, deviating approximately 5 degrees east of north. This deviation means the influence of a crosswind alters the plane’s intended trajectory. The actual ground path formed a diagonal, suggesting that the aircraft’s effective ground speed was reduced to 160 km/h and directed slightly to the east due to the wind.By analyzing the displacement from the intended path, the velocity contributed by the...
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Related Experiment Video

Updated: Jun 27, 2026

Combining Eye-tracking Data with an Analysis of Video Content from Free-viewing a Video of a Walk in an Urban Park Environment
08:25

Combining Eye-tracking Data with an Analysis of Video Content from Free-viewing a Video of a Walk in an Urban Park Environment

Published on: May 7, 2019

Orthogonal coding of object location.

Per Magne Knutsen1, Ehud Ahissar

  • 1Department of Neurobiology, Weizmann Institute for Science, Rehovot 76100, Israel.

Trends in Neurosciences
|December 17, 2008
PubMed
Summary
This summary is machine-generated.

Rodents use a sophisticated triple-code system for tactile object localization during whisking. This neural code involves three independent signals encoded by single neurons, simplifying sensory processing.

Related Experiment Videos

Last Updated: Jun 27, 2026

Combining Eye-tracking Data with an Analysis of Video Content from Free-viewing a Video of a Walk in an Urban Park Environment
08:25

Combining Eye-tracking Data with an Analysis of Video Content from Free-viewing a Video of a Walk in an Urban Park Environment

Published on: May 7, 2019

Area of Science:

  • Neuroscience
  • Sensory Coding
  • Somatosensation

Background:

  • Debate exists on whether neural representations use a universal or multiple codes.
  • Rodents actively use whiskers for tactile object localization and identification.

Purpose of the Study:

  • To investigate the tactile encoding scheme for object location during whisking in rodents.
  • To demonstrate the existence of an orthogonal, triple-code system.

Main Methods:

  • Review of experimental data combining neural recordings from primary sensory afferents and behavioral observations.
  • Analysis of whisker-object interactions during active whisking.

Main Results:

  • Tactile encoding of object location employs an orthogonal, triple-code scheme.
  • Vertical coordinates are encoded by afferent identity, horizontal by timing, and radial by intensity.
  • These three codes are mutually independent, allowing for 3D localization by single afferents.

Conclusions:

  • A single neuron can encode multiple aspects of sensory information through different codes (same-neuron-different-codes).
  • This scheme reduces code ambiguity and simplifies neural decoding circuits compared to traditional models.