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Related Concept Videos

Reflex Activity01:08

Reflex Activity

A reflex activity is an automatic, involuntary response to specific stimuli. It is a part of our survival mechanism, designed to protect us from potential harm. For example, when a bright light suddenly shines into our eyes, we instinctively close them or look away. This is a simple reflex activity orchestrated by the nervous system without conscious thought or effort.
A reflex exam is a diagnostic procedure performed by a healthcare professional to evaluate the functionality of a patient's...
The Micturition Reflex01:26

The Micturition Reflex

Urination, or micturition involves the coordination of the bladder's detrusor muscle and two sphincters to ensure controlled bladder emptying.
The process begins with bladder filling, where the bladder wall stretches as urine accumulates. This stretching activates the urine storage reflex, mediated by the sacral spinal segments and the pontine storage center. Efferent sympathetic impulses stimulate the detrusor muscle to relax and the internal urethral sphincter to contract, facilitating urine...
Accessory Structures of the Eye01:17

Accessory Structures of the Eye

Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
Muscles of the Eye01:20

Muscles of the Eye

The muscles of the eye are sophisticated structures that control eye movement and focus, allowing for the precise and rapid adjustments necessary for vision. The human eye is controlled by ten muscles — six extraocular muscles, three intraocular muscles, and one primary eyelid retractor muscle.
Extraocular Muscles
The six extraocular muscles surround the eyeball and control its movements. They are responsible for a wide range of eye motions, including looking up, down, left, right, and rotating...
Nonconscious Mimicry01:13

Nonconscious Mimicry

Nonconscious mimicry occurs when individuals alter their mannerisms to match the behaviors and expressions of those nearby, without intention.

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Related Experiment Video

Updated: Jun 19, 2026

Classical Short-Delay Eyeblink Conditioning in One-Year-Old Children
07:36

Classical Short-Delay Eyeblink Conditioning in One-Year-Old Children

Published on: September 1, 2018

ON THE TIME OF REFLEX WINKING.

D P Mayhew1

  • 1Physiological Laboratory of the University of Michigan.

The Journal of Experimental Medicine
|October 30, 2009
PubMed
Summary

This study found that the average reaction time was 0.0420 seconds, with individual differences and apprehension influencing the speed. Natural winks and sex did not affect reaction times.

Area of Science:

  • Physiology
  • Psychology

Background:

  • Reaction time is a fundamental measure in understanding human performance.
  • Individual variability in physiological responses is well-documented.

Purpose of the Study:

  • To determine the mean total time for a specific reaction.
  • To investigate factors influencing reaction time, including natural winks, individual differences, sex, and apprehension.

Main Methods:

  • Conducted 450 experiments across sixteen subjects.
  • Measured reaction times under controlled conditions.

Main Results:

  • The mean total reaction time was 0.0420 seconds.
  • Individual reflex times varied between 0.0351 and 0.0491 seconds.

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Using Electroencephalography Measurements and High-quality Video Recording for Analyzing Visual Perception of Media Content
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Using Electroencephalography Measurements and High-quality Video Recording for Analyzing Visual Perception of Media Content

Published on: May 26, 2018

Related Experiment Videos

Last Updated: Jun 19, 2026

Classical Short-Delay Eyeblink Conditioning in One-Year-Old Children
07:36

Classical Short-Delay Eyeblink Conditioning in One-Year-Old Children

Published on: September 1, 2018

Using Electroencephalography Measurements and High-quality Video Recording for Analyzing Visual Perception of Media Content
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Using Electroencephalography Measurements and High-quality Video Recording for Analyzing Visual Perception of Media Content

Published on: May 26, 2018

  • Apprehension was found to decrease reaction time, while natural winks and sex had no significant influence.

    • Conclusions:

    • Reaction time exhibits significant individual variability but is consistent for individuals under similar conditions.
    • Psychological factors like apprehension play a role in modulating physiological response times.