Imagining rotation by endogenous versus exogenous forces: distinct neural mechanisms

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Neuroimaging

Background:

• Previous neuroimaging studies on mental image transformations yield inconsistent results regarding motor process involvement.
• Understanding the neural basis of mental rotation is crucial for cognitive neuroscience.

Purpose of the Study:

• To investigate whether different sensory or motor experiences influence the neural mechanisms of mental rotation.
• To determine if distinct mental rotation strategies exist and can be voluntarily adopted.

Main Methods:

• Subjects underwent neuroimaging (fMRI) while performing a mental rotation task.
• Two conditions were compared: imagining rotation after viewing an electric motor versus imagining rotation after manual rotation.
• The mental rotation task involved comparing rotating figures.

Main Results:

• Motor cortex, including primary motor area (M1), was activated only when subjects imagined rotations following manual activity.
• No significant motor cortex activation was observed when subjects imagined rotations after passively viewing a motor.
• This suggests distinct neural pathways for different mental rotation strategies.

Conclusions:

• There are at least two qualitatively distinct ways to imagine object rotation.
• The choice of mental rotation strategy (visual vs. motor-based imagery) can be voluntarily adopted by individuals.
• These findings advance our understanding of the flexibility and neural underpinnings of mental imagery.