Viewer perspective in the mirroring of actions

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Action Representation

Background:

• The brain's action representation system includes mirror neurons that activate during both action execution and observation.
• A key paradox is that observed actions have varied viewer perspectives, while executed actions use a 'self' coordinate space, with the MNS lacking known perspective-mapping properties.

Purpose of the Study:

• To investigate whether the mirror neuron system (MNS) encodes viewer perspective during action observation.
• To determine if this encoding is specific to embodied actions.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to measure brain activity in humans.
• Participants observed both embodied actions (performed by humans) and disembodied movements of objects.
• Experiments 1 and 2 focused on action observation, while Experiment 3 differentiated between embodied and disembodied actions.

Main Results:

• Key frontal lobe areas of the MNS directly encode viewer perspective during action observation.
• This perspective encoding was observed only for embodied actions, not for disembodied object movements.

Conclusions:

• The findings provide evidence that the MNS is sensitive to viewer perspective during action observation.
• The results suggest the MNS plays a significant role in the formation of action memories, particularly for embodied actions.