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Related Experiment Video

Updated: May 9, 2026

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane

Published on: August 22, 2025

Gaze direction affects linear self-motion heading discrimination in humans.

Jianguang Ni¹, Milos Tatalovic, Dominik Straumann

¹Department of Neurology, University Hospital Zürich, Zürich, Switzerland.

The European Journal of Neuroscience

|August 1, 2013

Summary

Heading discrimination is influenced by eye and head orientation. Looking in a certain direction shifts perception, impacting how we sense self-motion relative to our body.

Keywords:

eye linear heading neck otoliths perception vestibular

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Last Updated: May 9, 2026

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Published on: May 23, 2013

Area of Science:

Neuroscience
Human Perception
Vestibular System

Background:

Heading discrimination is crucial for spatial orientation and navigation.
The otolith organs in the vestibular system detect linear acceleration but require reference frames for interpretation.
Understanding how visual gaze and head position influence self-motion perception is key to deciphering sensory integration.

Purpose of the Study:

To investigate how eye-in-head and head-on-trunk orientation affect heading discrimination.
To determine if gaze direction biases the perception of self-motion relative to the trunk.
To explore the reference frame transformations involved in processing motion cues.

Main Methods:

Participants performed passive linear translations in darkness.
Heading discrimination was assessed based on trunk-referenced straight-ahead.
Experiments manipulated eye-in-head eccentricity and head-on-trunk deviation.

Main Results:

Looking in a specific direction (e.g., right) shifted the point of subjective equivalence towards the opposite direction (left).
Head deviation (16° left) produced an effect in the same direction as eye eccentricity.
These biases align with statistical regularities in human behavior, like gaze-path alignment.

Conclusions:

Both eye and head orientation significantly influence heading discrimination.
Gaze direction appears to introduce biases in self-motion perception.
These findings suggest gaze influences head-to-trunk reference frame transformations for motion perception.