Survivors in the study who crossed the 300-repetition daily threshold shared one common factor: access to a device capable of delivering assisted, full-range finger movement automatically — without requiring caregiver assistance or significant hand strength to operate.
Manual exercises cannot replicate this. A hand with limited mobility cannot generate its own repetitions at volume. The movement has to be externally guided — consistently, daily, and in sufficient quantity to trigger the neural adaptation that recovery depends on.
The NRA's findings align with existing neuroplasticity research, which has consistently demonstrated that the brain's capacity to rebuild motor pathways does not expire — but does require sustained, repetitive input to activate.