If someone suddenly taps you on the shoulder, your eyes may widen or your body might flinch. Humans react instantly to such stimuli, and as the same stimulus is repeated, their responses gradually ...

August 25, 2008 — Individuals homozygous for a common variant of a dopamine catabolic enzyme demonstrate a greater influence of aversive stimuli on the acoustic affective startle reflex — an indicator ...

Different ingredients in marijuana appear to affect regions of the brain differently during brain processing functions involving responses to certain visual stimuli and tasks, according to a new ...

Ancestral threats like snakes and heights trigger more intense physiological fear responses (sweating) than modern threats like firearms and disease.

During the first period, the participant had to remain still, maintaining a bipodal posture in front of the fixation cross. The initial position of the center of pressure was calculated. During the ...

The quality of the animal-human relationship and, consequently, the welfare of animals can be improved by gentle interactions such as stroking and talking. The perception of different stimuli during ...

Reaction time reflects brain processing speed; simple tests like the ruler drop can reveal attention, coordination, and early ...