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Fixation and Sectioning

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Related Experiment Video

Updated: Jul 13, 2026

Quantitative [18F]-Naf-PET-MRI Analysis for the Evaluation of Dynamic Bone Turnover in a Patient with Facetogenic Low Back Pain

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Published on: August 8, 2019

Initial fixation placement in face images is driven by top-down guidance.

¹Research Centre for Comparative Cognition, Department of Psychology, University of Lincoln, Lincoln, LN6 7TS, UK. kguo@lincoln.ac.uk

Experimental Brain Research

|July 10, 2007

Summary

Monkey

Area of Science:

Neuroscience
Primate behavior
Visual perception

Background:

The eyes are critical for facial communication and are often the first feature explored during face perception.
It remains unclear whether the salience of the eye region is due to its structural properties or its communicative importance.

Purpose of the Study:

To investigate the factors driving initial eye fixations in monkey faces.
To determine if eye region saliency is based on local structure or learned importance in facial communication.

Main Methods:

Rhesus monkeys (Macaca mulatta) viewed images of intact and manipulated monkey faces.
Eye movements were precisely tracked using implanted eye coils.
Stimuli included original faces, faces with scrambled eyes, and scrambled faces with intact eyes.

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Main Results:

The eye region attracted similar viewing time and fixations regardless of image scrambling.
Scrambled eyes still garnered significant attention.
Monkeys consistently made their first eye movement (saccade) towards the eye region, irrespective of image content.

Conclusions:

Initial eye fixation placement during face exploration is primarily driven by top-down factors.
Prior knowledge of the eye's location within a face context strongly influences visual attention.
This suggests an internal, knowledge-based mechanism guides early face processing in primates.