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Related Experiment Video

Updated: May 15, 2026

A Modified Mirror Test as a Visual Guide for the Self-awareness Trait in Wild Antarctica Penguins, Pygoscelis adeliae

A Modified Mirror Test as a Visual Guide for the Self-awareness Trait in Wild Antarctica Penguins, Pygoscelis adeliae

Published on: July 8, 2025

Shadows in the mirror.

Luisa Sartori¹, Umberto Castiello

¹Department of Psychology, University of Padova, Padova, Italy.

|December 25, 2012

Summary

This summary is machine-generated.

The human mirror neuron system

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Published on: November 10, 2010

Area of Science:

Neuroscience
Motor Control
Visual Perception

Background:

Mirror neurons activate during action execution and observation.
Transcranial magnetic stimulation (TMS) provides evidence for human mirror neurons.
Shadows accompany movements and may aid action recognition.

Purpose of the Study:

To investigate the mirror system's response to shadowed movements.
To determine if visual shadows influence corticospinal excitability during action observation.

Main Methods:

Participants observed a prehensile action under two conditions: fully illuminated and partially shadowed.
Motor-evoked potentials were recorded from hand muscles using single-pulse TMS.
Primary motor cortex excitability was assessed via these motor-evoked potentials.

Main Results:

Motor cortex excitability modulation was significantly lower when observing shadowed actions compared to illuminated actions.
Processing visual shadows modulated corticospinal excitability.
The mirror system's response is influenced by the presence of shadows.

Conclusions:

The human mirror system is sensitive to visual aspects of movement, including shadows.
Shadow processing impacts corticospinal excitability, suggesting a role in action understanding.
The mirror system is finely tuned to visual cues in biological movements.