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Related Experiment Video

Updated: Jul 13, 2026

High-resolution Functional Magnetic Resonance Imaging Methods for Human Midbrain

High-resolution Functional Magnetic Resonance Imaging Methods for Human Midbrain

Published on: May 10, 2012

An object-based frame of reference within the human pulvinar.

Robert Ward¹, Isabel Arend

¹Wolfson Centre for Clinical and Cognitive Neuroscience, School of Psychology, University of Wales, Bangor, UK. r.ward@bangor.ac.uk

Brain : a Journal of Neurology

|August 21, 2007

Summary

Spatial coding in the pulvinar nucleus relies on object-based reference frames, not just retinotopic ones. Damage to the pulvinar impairs spatial localization in both object-based and retinotopic coordinate systems.

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Area of Science:

Neuroscience
Visual Cognition
Spatial Processing

Background:

The pulvinar nucleus of the thalamus is crucial for processing spatial visual information.
It connects extensively with cortical areas, translating visual input into various reference frames.

Observation:

This study investigated spatial coding in two patients with pulvinar nucleus damage.
Patients performed target localization tasks within a structured search array and retinotopic space.

Findings:

Evidence suggests spatial coding in the pulvinar is defined by an object-based frame.
Spatial deficits in patients were observed in both retinotopic and object-based frames.
Poor localization occurred regardless of the array's retinotopic position.

Implications:

Pulvinar damage can lead to spatial processing biases defined by object-based and retinotopic coordinate systems.
This highlights the pulvinar's role in integrating multiple spatial reference frames for accurate perception.