Brain activation by a VR-based motor imagery and observation task: An fMRI study

Area of Science:

• Neuroscience
• Rehabilitation Medicine
• Human-Computer Interaction

Background:

• Motor imagery (MI) and motor observation (MO) are explored for brain plasticity in stroke rehabilitation.
• Brain-computer interfaces (BCIs) and virtual reality (VR) offer potential for enhanced neurofeedback and embodied experiences.

Purpose of the Study:

• To investigate brain activation patterns during an ecologically-valid VR-BCI task combining MI and MO.
• To compare the neural effects of this combined task against MI-only and overt motor execution tasks.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used in healthy adults.
• Participants performed a VR-BCI task (NeuRow) involving MI and MO of rowing with a virtual avatar.
• Brain activation was compared between the VR-BCI MI-MO task, a conventional MI-only task, and overt motor execution.

Main Results:

• The VR-BCI MI-MO task elicited significantly stronger brain activation than MI-only and overt motor execution tasks.
• Activation was observed in somatomotor, premotor, parietal, and occipital cortices.
• The mirror neuron system (MNS) and visual areas involved in attention and motion processing were recruited.

Conclusions:

• Ecologically-valid MI-MO tasks using VR-BCI engage the brain more extensively than conventional MI tasks.
• These findings suggest potential for developing more effective neurorehabilitation protocols leveraging virtual representations and embodied feedback.