User Tools

    To create and edit articles, please register and log-in

Main Menu

Main menu
Click categories to expand


A-Z listingplugin-autotooltip__plain plugin-autotooltip_bigA-Z listing

This is an alphabetical index of all content pages.


Other categories

Utilities

Contact
Register

Also see

Importance Ratings
News
Legal
Donate/Sponsor
Curator's rationale


Wikenigma supports:


Feeds etc
rss / xml feed
sitemap file
A-Z listing (archived)


Auto-Translate Site
Indexed under : Life Sciences / Human Body

Wikenigma - an Encyclopedia of Unknowns Wikenigma - an Encyclopedia of the Unknown

Thermoception

Thermoception, or the body's ability to sense heat (and cold), has been studied for several centuries. It's thought that the ability to detect temperature is extremely ancient in evolutionary terms. Going back as far as the evolution ofArchaea.

In humans and other mammals, specialist nerve cells in the skin (and some other organs) called thermoreceptors can detect temperature changes of just a few degrees C. They typically have 'raw' nerve endings which aren't sheathed in myelin.

It has been found that there are (at least) two types of thermoreceptors, one detecting higher temperatures, and the other responsible for cold sensing.

It's not currently known exactly how the sensing works - in either type of cell.

Thermoreceptors have been classically described as having 'free' non-specialized endings; the mechanism of activation in response to temperature changes is not completely understood.“

Source : Wikipedia

It's thought that chemical changes in proteins at the ends of the fibres, brought about by contact by a hot or cold object or environment, are converted into an impulse response (or change in firing rate) of the nerve cells. The changes are detected very rapidly - in a few milliseconds. Exactly how this happens is unclear. Current research suggests that there are likely to be a wide range (a 'constellation') of thermally sensitive chemicals involved.

As yet, no research projects have clarified whether the nerve sensors for pleasurable sensations of warmth are the same ones which are responsible for pain caused by heat (see below).


Also see : Heat painplugin-autotooltip__plain plugin-autotooltip_bigHeat pain

The intense pain associated with touching, or being touched by, an object that is damagingly hot, is initiated via specialist cells in the skin called TRPV1 cells (Transient Receptor Potential cation channel subfamily V member 1). They are a sub-category of '…


    Share this page :

Dear reader : Do you have any suggestions for the site's content?

Ideas for new topics, and suggested additions / corrections for old ones, are always welcome.

If you have skills or interests in a particular field, and have suggestions for Wikenigma, get in touch !


Or, if you'd like to become a regular contributor . . . request a login password. Registered users can edit the entire content of the site, and also create new pages.

( The 'Notes for contributors' section in the main menu has further information and guidelines etc.)

Automatic Translation

You are currently viewing an auto-translated version of Wikenigma

Please be aware that no automatic translation engines are 100% accurate, and so the auto-translated content will very probably feature errors and omissions.

Nevertheless, Wikenigma hopes that the translated content will help to attract a wider global audience.

Show another (random) article

DOKUWIKI IMPLEMENTATION DESIGN BY UNIV.ORG.UK MAY 2022