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Related Concept Videos

Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it instrumental in...
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Position Vectors01:29

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Relative Motion Analysis using Rotating Axes - Acceleration01:22

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Related Experiment Video

Updated: Jun 13, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
06:46

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

A relative position code for saccades in dorsal premotor cortex.

Bijan Pesaran1, Matthew J Nelson, Richard A Andersen

  • 1Center for Neural Science, New York University, New York, New York 10003, USA.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|May 14, 2010
PubMed
Summary

Neurons in the dorsal premotor cortex (PMd) use relative spatial coding for both arm and eye movements. This suggests PMd integrates visual-motor information to coordinate hand and gaze actions.

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Area of Science:

  • Neuroscience
  • Motor Control
  • Computational Neuroscience

Background:

  • Coordinating hand and eye movements involves complex spatial computations.
  • The dorsal premotor cortex (PMd) is crucial for guiding arm movements.
  • Understanding how PMd integrates visual and motor information is key to explaining coordinated behavior.

Purpose of the Study:

  • To investigate saccade-related signals in PMd.
  • To determine if PMd plays a role in coordinating visual-motor behavior.
  • To compare PMd neuron activity with parietal reach region (PRR) neurons during motor tasks.

Main Methods:

  • Recorded neural activity in PMd and PRR during center-out reaching and saccade tasks.
  • Analyzed neuronal responses related to saccade targets and relative positions of gaze, hand, and movement goal.
  • Compared the proportion of saccade-tuned cells in PMd and PRR.

Main Results:

  • PMd neurons showed stronger pre-saccade activity compared to PRR neurons.
  • PMd had a higher proportion of exclusively saccade-tuned cells than PRR.
  • PMd neurons encoded saccade targets using a relative position code, similar to reach targets, dependent on gaze, hand, and goal positions.

Conclusions:

  • PMd utilizes a similar relative position code for both eye and arm movements.
  • Eye movement and eye position signals in PMd provide spatial information linking eye and arm control.
  • PMd is involved in coordinating visual-motor behavior by integrating spatial information for both gaze and limb movements.