Introduction
STILL
Since early childhood, humans continuously learn new motor skills throughout all stages of life. For example, when people go for the first time to a sushi restaurant, their lack of motor experience induces them to observe other diners to figure out how to break, hold and use chopsticks and eat a nigiri. However, it is well known that observing others is not just a way to overcome the initial impasse. Still, it also represents a fundamental element promoting—via the mirror mechanismRecently, the reciprocal advantages of action observation and execution have been combined in the so-called Action Observation Training (AOT). Several studies proved the efficacy of AOT in facilitating the recovery of motor abilities in people with brain damageAt the neural level, action observation can modulate corticospinal excitabilityThe neural reactivity to action observation has been associated with the efficacy of AOT. Previous TMS studies demonstrated that the repeated administration of action observation induces neuroplastic changes larger than those due to the sole physical practice according to the congruence between the observed and executed actionsWhile most of the investigations to date assessed the cortical modulations associated with the AOT efficacy, few studies targeted the AOT impact on the peripheral boundaries of the motor system, Even assuming that patterns of muscular activation change during AOT, it remains to be established whether the observed model can bias these changes. In other words, can the kinematics or electromyographic patterns of the trainee be 