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  1. Dictionary
    startle
    /ˈstɑːtl/

    verb

    • 1. cause to feel sudden shock or alarm: "a sudden sound in the doorway startled her"

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    More definitions, origin and scrabble points

  2. www.healthline.com › health › parentingStartle Reflex in Babies: How Long Does It Last? | Healthline

    Jul 14, 2023 · If your newborn is startled, they might cry out and curl up. This reflex is normal for the first few months of life and is something your baby’s doctor may check for after delivery. If your new...

  3. en.wikipedia.org › wiki › Moro_reflexMoro reflex - Wikipedia

    Jul 22, 2024 · It is distinct from the startle reflex. Unlike the startle reflex, the Moro reflex does not decrease with repeated stimulation. The primary significance of the Moro reflex is in evaluating integration of the central nervous system.

  4. en.wikipedia.org › wiki › Prepulse_inhibitionPrepulse inhibition - Wikipedia

    Jul 22, 2024 · PPI measurement in human. The main three parts of the procedure are prepulse, startle stimulus, and startle reflex. Different prepulse-to-pulse intervals, or lead intervals, are used: 30, 60, 120, 240 and 480 ms. Lead interval counts from the start of prepulse to the start of the pulse.

  5. medium.com › deep-science › the-neuroscience-of-jump-scaresThe Neuroscience of Jump Scares: How Startle Reflexes Work

    Oct 2, 2023 · The startle reflex begins in a region of the brain called the amygdala, which is responsible for processing emotions, particularly fear. The amygdala acts as an alarm system, detecting...

  6. www.webmd.com › baby › what-is-the-moro-reflexMoro Reflex: What You Should Know About the Moro Reflex | WebMD

    Dec 5, 2023 · The startle reflex is triggered by sudden noise and movement or bright light and is a single event. Infantile spasms only last a couple of seconds but happen one after another.

  7. en.wikipedia.org › wiki › Primitive_reflexesPrimitive reflexes - Wikipedia

    Jul 22, 2024 · Although this is sometimes referred to as the startle reaction, startle response, startle reflex or embrace reflex, most researchers see it as distinct from the startle reflex, and it is believed to be the only unlearned fear in human newborns.

  8. onlinelibrary.wiley.com › doi › fullRecent advances in studying brain‐behavior ... | Wiley Online...

    Jul 4, 2023 · The startle response is a cross-species defensive reflex that is considered a key tool for cross-species translational emotion research.

  9. link.springer.com › referenceworkentry › 10Startle Response | SpringerLink

    Jan 1, 2024 · A series of skeletal muscle contractions known as the startle reflex is thought to be a behavioral interruption that primes the organism for action. It is often quantified in humans by the component of eyeblinks and is triggered by a strong stimulus with a quick onset.

  10. www.simplypsychology.org › unconditioned-stimulusUnconditioned Stimulus In Psychology: Definition & Examples

    Feb 2, 2024 · An unconditioned stimulus (US) is something that naturally triggers a reflexive response without prior learning or conditioning. For example, the smell of food causing hunger or a loud noise causing a startle response.

  11. www.verywellhealth.com › hyperarousal-in-ptsd-5219152Causes, Symptoms, and Treatment of Hyperarousal in PTSD |...

    Jun 10, 2024 · Summary. Hyperarousal is caused by overactive fight-or-flight stress responses that keep the body and mind on high alert, even when there's no cause for alarm. It is a commonly experienced symptom of PTSD. Being in a constant state of arousal can disrupt daily life in several ways and make it difficult to sleep.