2-Minute Neuroscience: Touch Receptors
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  • Release Date: 2024-01-26
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  • Touch receptors
Video Introduction

Touch receptors in the skin provide us with tactile information about qualities like the position, shape, texture, pressure, and movement of things we come in contact with. They are often classified as either rapidly-adapting or slowly-adapting. Rapidly-adapting receptors are activated when a stimulus is first encountered, but fall silent if the stimulus remains present. They are important for detecting things like movement. Slowly-adapting receptors keep responding to a continuously present stimulus and are important for detecting things like the size and shape of objects. Touch receptors also vary in the size of their receptive field, or the area they can detect signals from. Having many smaller receptive fields typically allows for better tactile discrimination than fewer, large receptive fields. There are four main types of touch receptors found in hairless skin (like that of the hand).

Merkel’s discs are slowly-adapting receptors that have very small receptive fields and high spatial resolution. They are especially dense in the fingertips, and are best-suited for processing information about shape and texture.

Meissner’s corpuscles are rapidly-adapting receptors. They have relatively small receptive fields, but their spatial resolution is inferior to that of Merkel’s discs. They are especially effective at transmitting information about movement between the skin and another surface. This can be used to sense texture and to detect if an object is sliding past the skin--which is important for maintaining grip.

Pacinian corpuscles are rapidly-adapting receptors with very large receptive fields. They are thought to be most effective at transmitting information about vibrations objects cause when they are contacted or grasped by the hand. This information may be important for the use of tools.

Ruffini’s endings are slowly-adapting receptors with large receptive fields.They are poorly understood, but seem to respond most to skin stretching, like what would occur with movement of the fingers. This information might be especially important in generating awareness of finger and hand position. [1]

References
  1. Purves D, Augustine GJ, Fitzpatrick D, Hall WC, Lamantia AS, Mooney RD, Platt ML, White LE. Neuroscience. 6th ed. Sunderland, MA. Sinauer Associates; 2018.
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Challenged, N. 2-Minute Neuroscience: Touch Receptors. Encyclopedia. Available online: https://encyclopedia.pub/video/video_detail/1092 (accessed on 30 June 2024).
Challenged N. 2-Minute Neuroscience: Touch Receptors. Encyclopedia. Available at: https://encyclopedia.pub/video/video_detail/1092. Accessed June 30, 2024.
Challenged, Neuroscientifically. "2-Minute Neuroscience: Touch Receptors" Encyclopedia, https://encyclopedia.pub/video/video_detail/1092 (accessed June 30, 2024).
Challenged, N. (2024, January 26). 2-Minute Neuroscience: Touch Receptors. In Encyclopedia. https://encyclopedia.pub/video/video_detail/1092
Challenged, Neuroscientifically. "2-Minute Neuroscience: Touch Receptors." Encyclopedia. Web. 26 January, 2024.
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