startle reflex

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Noun1.startle reflex - a normal reflex of young infants; a sudden loud noise causes the child to stretch out the arms and flex the legs
startle, jump, start - a sudden involuntary movement; "he awoke with a start"
References in periodicals archive ?
oc), masseter, sternocleidomastoid (SCM), biceps brachii, abductor pollicis brevis (APB), and tibialis anterior muscles after supraorbital electrical stimuli, auditory stimuli (auditory startle reflex, ASR), and electrical stimuli of the median nerve at the wrist (startle reflex to somatosensory inputs, SSS).
This reaction consisted of the coordinated movement of several muscle groups, the eyeblink response being the most reliable, fastest, and most resistant to the habituation component of the startle reflex (Landis & Hunt, 1939).
A study at Tubingen University in Germany showed vanilla aromas helped reduce the startle reflex.
One idea is that like your startle reflex, laughter-associated tickling requires that you not know it's coming.
Modulation of Startle Reflex in Colombian Population: Evidence of the Interaction between Emotion and Motivation
Recent human volunteers studies involving seated transient perturbations have suggested that the startle reflex forms part of the neuromuscular response to a rear-end collision.
At birth an infant has very few resources to understand any sensory information and the Moro startle reflex allows the infant to instantly respond to threat.
In a number of studies, magnitude of the startle reflex is reliably augmented during perception of unpleasant, compared to pleasant stimuli, either when people view pictures or films, listen to sounds, or smell odors (for a review, see Bradley, Cuthbert, & Lang, 1999).
Or the startle reflex where sudden sounds cause me to suddenly turn to the left or right.
15) observed a reduced acoustic startle reflex in patients suffering from OT.
A startle reflex that is elicited by an unpredicted noise is referred to as an acoustic or audiogenic startle reflex, (Wilkens, Hallett, & Wess, 1986; Brown, Rothwell, Thompson, Britton, Day, & Marsden, 1991; Gluck, Mercado, & Myers, 2008).
You can be startled, and your startle reflex can cause you to clutch the trigger during the moment there is a chambered round, but before you get the safety on.