Ketamine is a rapid-acting antidepressant that also influences neural reactivity to affective stimuli. However, the effect of ketamine on behavioral affective reactivity is yet to be elucidated. The ...

Two studies examined the amplitude of the startle response as a function of the Dark Tetrad of personality (narcissism, Machiavellianism, psychopathy, and sadism). We measured electromyographic ...

Hyperekplexia is a genetic condition characterized by an exaggerated startle reaction to sudden loud sounds, movement, or touch. The muscles may stiffen as a result. Hyperekplexia is a rare condition.