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Related Concept Videos

What is a Sensory System?01:31

What is a Sensory System?

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Sensory systems detect stimuli—such as light and sound waves—and transduce them into neural signals that can be interpreted by the nervous system. In addition to external stimuli detected by the senses, some sensory systems detect internal stimuli—such as the proprioceptors in muscles and tendons that send feedback about limb position.
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Introduction to Special Senses01:26

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Sensory receptors play an integral part in comprehending our external and internal environments. They receive diverse stimuli, converting them into the nervous system's electrochemical signals. This conversion occurs as the stimulus alters the sensory neuron's cell membrane potential, instigating the generation of an action potential. This action potential is subsequently transmitted to the central nervous system (CNS), which integrates with other sensory data or higher cognitive...
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Sensory Modalities01:15

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Sensation typically is the process by which the sensory receptors and sense organs detect stimuli from the internal and external environment and transmit this information to the central nervous system for processing.
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The somatosensory system is the central and peripheral nervous system component that senses and processes touch, pressure, pain, temperature, and body position or proprioception. The process of sensation takes place at three levels:
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Sensation01:21

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Sensory receptors are specialized neurons that respond to specific types of external stimuli, initiating the process known as sensation. This occurs when sensory input, such as light entering the eye, is detected by these receptors, causing chemical changes in the cells of the retina. These cells then convert the sensory stimulus into action potentials that are transmitted to the central nervous system, a process termed transduction.
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Introduction to Sensory Receptors01:31

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Sensory receptors are vital in our ability to perceive and interpret the world. Sensory receptors are specialized cells in the peripheral nervous system that respond to various stimuli and enable one to experience different sensations. Based on specific criteria, sensory receptors are classified into distinct types.
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Related Experiment Video

Updated: Apr 24, 2026

Testing Sensory and Multisensory Function in Children with Autism Spectrum Disorder
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Validity of sensory systems as distinct constructs.

Chia-Ting Su1, L Diane Parham2

  • 1Chia-Ting Su, PhD, OTR, is Associate Professor, Fu Jen Catholic University, College of Medicine, Department of Occupational Therapy, New Taipei City, Taiwan.

The American Journal of Occupational Therapy : Official Publication of the American Occupational Therapy Association
|September 4, 2014
PubMed
Summary

This study validates that tactile, vestibular-proprioceptive, visual, and auditory systems are distinct constructs. These sensory systems are measurable and not age-dependent, supporting sensory integration theory.

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Area of Science:

  • Neuroscience
  • Occupational Therapy
  • Developmental Psychology

Background:

  • Ayres's theory of sensory integration is a foundational concept in occupational therapy.
  • The theory posits that sensory systems interact to support functional participation.
  • Empirical validation of distinct sensory constructs is crucial for advancing the theory.

Purpose of the Study:

  • To investigate the validity of sensory systems as distinct, measurable constructs.
  • To examine whether sensory questionnaire items represent separate sensory system constructs.
  • To test the age dependency of these sensory constructs.

Main Methods:

  • Confirmatory Factor Analysis (CFA) was employed to analyze data from clinical records.
  • Two age groups were studied: 2- to 5-year-olds (n=231) and 6- to 10-year-olds (n=223).
  • Multiple CFA models were tested for goodness of fit to assess construct validity.

Main Results:

  • A consistent, valid model emerged for both age groups, identifying distinct tactile, vestibular-proprioceptive, visual, and auditory sensory factors.
  • These distinct sensory constructs were found to be independent of age.
  • Models grouping items by sensory processing problems (e.g., over- or underresponsiveness) did not yield valid factors.

Conclusions:

  • Distinct sensory system constructs, including tactile, vestibular-proprioceptive, visual, and auditory, can be validly measured using questionnaire data.
  • The findings support the distinctness of these sensory systems as measurable constructs, irrespective of age.
  • This research provides empirical support for key aspects of Ayres's sensory integration theory.