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Related Concept Videos

What is a Sensory System?01:31

What is a Sensory System?

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.
The Retina01:32

The Retina

The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.
Vision01:24

Vision

Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
Spinal Cord: Information Processing01:10

Spinal Cord: Information Processing

The spinal cord is an integral hub for motor and sensory information that enables the brain to communicate with the peripheral nervous system (PNS). This communication consists of relaying sensory data and transmission of motor commands.
Sensory Information Processing
Sensory information processing begins at the sensory receptors located in the skin and other tissues, which detect somatic sensory stimuli such as touch, temperature, or pain. These receptors function as catalysts, initiating...
Overview of Somatic Sensory Pathways01:29

Overview of Somatic Sensory Pathways

Somatic sensory or somatosensory pathways refer to the neural pathways that carry information related to touch, pressure, pain, temperature, and proprioception from the skin, muscles, tendons, and joints to the brain. These pathways involve several stages of processing and integration of sensory information.
The somatosensory system is divided into three main pathways: the dorsal (or posterior) column-medial lemniscus, spinothalamic (or anterolateral), and spinocerebellar pathways.
The dorsal...
Major Somatic Sensory Pathways01:28

Major Somatic Sensory Pathways

Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the posterior columns...

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Information conveyed by onset transients in responses of striate cortical neurons.

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Maintaining the cornea and the general physiological environment in visual neurophysiology experiments.

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Related Experiment Video

Updated: Jul 24, 2026

Viral Tracing of Genetically Defined Neural Circuitry
13:06

Viral Tracing of Genetically Defined Neural Circuitry

Published on: October 17, 2012

Transmission of spatial information in S-cone pathways.

A B Metha1, P Lennie

  • 1Center for Visual Science, University of Rochester, New York, USA.

Visual Neuroscience
|May 22, 2002
PubMed
Summary

The S-cone system

Area of Science:

  • Vision science
  • Retinal physiology
  • Visual perception

Background:

  • The S-cone system, responsible for blue color vision, is well-characterized.
  • Understanding retinal image sampling is key to visual performance.

Purpose of the Study:

  • To investigate how S-cone mosaic sampling impacts visual performance.
  • To measure grating acuity across the visual field using the S-cone system.

Main Methods:

  • Interferometry was used to measure S-cone grating acuity in the fovea and at eccentricities up to 20 degrees.
  • A computational model observer was developed incorporating noise and eccentricity-dependent pooling.

Main Results:

  • The model successfully predicted measured S-cone acuities based on sampling properties.

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  • The degree of postreceptoral pooling required by the model aligns with anatomical and physiological data.

    • Conclusions:

    • Retinal image sampling and postreceptoral pooling significantly influence S-cone visual performance.
    • The S-cone system serves as a valuable model for understanding visual performance control.