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Related Concept Videos

Major Somatic Sensory Pathways01:28

Major Somatic Sensory Pathways

Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the posterior columns...

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Related Experiment Video

Updated: Jun 4, 2026

Integrating Visual Psychophysical Assays within a Y-Maze to Isolate the Role that Visual Features Play in Navigational Decisions
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Visually guided pointing movements are driven by the salience map.

Michael Zehetleitner1, Michael Hegenloh, Hermann J Müller

  • 1Ludwig-Maximilians-Universität München, Munich, Germany. mzehetleitner@psy.lmu.de

Journal of Vision
|February 2, 2011
PubMed
Summary
This summary is machine-generated.

Visual salience maps guide attention and movements motor-unclearly. Four experiments confirm that salience manipulations affect both manual pointing and simple detection responses, supporting a unified salience map model.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Visual salience maps are theorized to guide target selection in a motor-unspecific way.
  • This assumption influences various responses, including manual key-presses and movements.
  • However, empirical psychophysical evidence for this motor-unspecific guidance is limited.

Purpose of the Study:

  • To investigate whether modulations of visual salience influence manual pointing movements.
  • To test the hypothesis that a single, motor-unspecific salience map guides both perceptual decisions and motor actions.
  • To provide psychophysical evidence for the motor-unspecific nature of visual salience.

Main Methods:

  • Four experiments were conducted, each focusing on a different known modulator of visual salience.
  • Manipulations included feature contrast, cross-trial dimension sequence, semantic pre-cueing, and dimensional target redundancy.
  • Response initiation latencies and durations for manual pointing movements were measured.

Main Results:

  • All four tested modulations of visual salience significantly affected the initiation latencies and durations of manual pointing movements.
  • These effects were consistent across different types of motor responses, including manual pointing and simple detection.
  • The findings demonstrate that salience influences action selection irrespective of the specific motor output.

Conclusions:

  • The results support the existence of a motor-unspecific salience map in visual attention.
  • This salience map appears to guide not only covert attention but also overt movements like eye and hand actions.
  • The study provides strong psychophysical evidence for a unified mechanism underlying salience-based guidance across different response modalities.