Motor Imagery and Action Observation in Rehabilitation

Motor imagery and action observation are non-physical interventions that harness neural circuits underlying movement to support motor learning and recovery. Motor imagery involves the mental rehearsal of movement without overt execution, engaging sensorimotor networks much like actual practice. Action observation recruits mirror neuron systems by watching others perform actions, facilitating neural priming. Combined approaches exploit shared and complementary processes, enhancing corticospinal excitability and reinforcing sensorimotor pathways. These techniques have been applied across stroke rehabilitation, orthopaedic recovery and prolonged immobilisation, often integrated with virtual reality or brain–computer interface technologies to personalise therapy and maximise functional gains.

Research from Nature Portfolio

Recent studies have shown that motor imagery engages internal forward models to predict sensory feedback, as evidenced by attenuation of imagined self-touch mirroring real self-touch. This finding supports the computational equivalence of imagined and executed movements and strengthens the rationale for imagery-based interventions in rehabilitation. It demonstrates that the brain recruits predictive mechanisms during imagery, offering insight into how mental rehearsal may reshape sensorimotor pathways and enhance functional recovery.

Motor Imagery and Action Observation in Rehabilitation publication trend

The graph below shows the total number of articles in motor imagery and action observation in rehabilitation across all publications each year (not limited to Nature Index journals).

Technical terms

Motor imagery: The mental simulation of movement without physical execution, engaging neural substrates akin to those used in actual movement.

Action observation: The process of watching another individual perform a movement, activating shared motor representations in the observer’s brain.

Forward model: A neural mechanism that predicts the sensory consequences of movements, enabling comparison between expected and actual feedback.

Resting-state functional connectivity: Correlated brain activity between regions during rest, used to infer the integrity of communication within motor and sensory networks.

Corticospinal excitability: The responsiveness of motor cortex outputs to stimuli, reflecting the readiness of spinal motor circuits for activation.

References

1. Relationship between resting-state functional connectivity and change in motor function after motor imagery intervention in patients with stroke: a scoping review. Journal of NeuroEngineering and Rehabilitation (2023).
2. Environmental enrichment through virtual reality as multisensory stimulation to mitigate the negative effects of prolonged bed rest. Frontiers in Aging Neuroscience (2023).
3. Motor imagery involves predicting the sensory consequences of the imagined movement. Nature Communications (2018).
4. Combined action observation and imagery facilitates corticospinal excitability. Frontiers in Human Neuroscience (2014).
5. Motor Imagery during Action Observation: A Brief Review of Evidence, Theory and Future Research Opportunities. Frontiers in Neuroscience (2016).