The syndrome of extremely restricted emotional competence, alexithymia, was originally conceptualized in psychoanalytic research and is now empirically and experimentally studied in clinical psychology and psychological medicine within the context of emotion regulation using neuroscientific techniques. Alexithymia refers to an individual's inability or impaired ability to name or express feelings and to distinguish them from the physical consequences of an acute or chronic stress reaction. Modern "brain-body-interface" research suggests that alexithymia represents a complex deficiency in cognitive processing and emotional regulatory processes. The neurobiological basis is assumed to be a preconscious, automatic and involuntary information transfer to the amygdalae of acquired representations of emotional contents stored in ventromedial prefrontal cortical areas.