In the plenary symposium, we have proposed alpha synchronization as a mechanism for pulsed “drowning” of a threatening stimulus in an enormous amount of synchronously firing neurons so as to prevent further associative links of the target with unconscious conflicts. We propose to understand this psychodynamically, in that it isolates the signal representation from being (further) integrated into associative networks. In other words, psychodynamically, as put forward by Howard Shevrin and colleagues, alpha synchronization prevents the signal representation from acquiring a subjective meaning. However, one question remained unanswered in the Shevrin studies: Why is it that the supraliminal primes are not able to induce alpha pulses, if a signal with exactly the same content, albeit at much lesser intensity, is thought to elicit this vivid brain reaction? The only difference is that one is subliminal while the other is supraliminal. For this to understand, we had proposed before that there is another mechanism, which is based on the default inhibition (or attenuation) mechanism of correctly anticipated proprioceptive feedback, when we are able to effectively grasp an external supraliminal stimulus. Based on series of clinical studies, which will be presented here, we propose that this attenuation enabled by the efference copy dynamics is, in some instances, the physiological instantiation of repression. Indeed, emotionally threatening stimuli require stronger inhibition, leaving (the attenuation of) the motor intentions totally unanswered, in order to radically prevent execution, which would lead to development of excess affect. This inhibition, then, yields a specific type of motor imagery, called “ phantoms,” which induce mental preoccupation, as well as symptoms, which, especially through their form, refer to the repressed motor fragments and are therefore qualified as “return of the repressed”.