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 ...

The SR-LAB startle response system is the world's most popular startle reflex research tool for assessing fear-potentiated startle (FPS), pre-pulse inhibition (PPI), and startle habituation. SR-LAB ...

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 ...

The acoustic startle response is an unconditional reflex involving rapid facial and skeletal muscle movements triggered by sudden, startling stimuli like sound or light. Studying the acoustic startle ...

To understand the expressive range of the human face, nothing beats watching a colleague scream his head off in slow motion. When my lab began to study protective reflexes in the early 2000s, the ...

I’ve been reading a lot recently about the startle reflex as it applies to folks who suffer with panic disorder and agoraphobia. As you probably suspected, people diagnosed with this wretched curse ...

A car backfires, and your shoulders jump. A shadow moves, and your eyes fly open before your brain catches up. That dramatic flash of white sclera around widened eyes feels automatic because it is.