This might be long, but here! Touch is actually a grab bag of various somatic senses, including the sensations of temperature, pressure, and pain, kinesthetic senses which give us a conception of our body in space (proprioception), and visceral senses such as stomach aches or nausea. Touch information is processed in the postcentral gyrus, corresponding roughly to the top middle area of the brain. The postcentral gyrus, or parts of it, are often referred to as the primary somatosensory cortex. This area gets more direct sensory input information than any other in the brain. Touch is one of the most primitive and universal of sensory apparatuses in the kingdom of life, alongside that of smelling. Almost all animals use touch to navigate complex environments, appraise their immediate surroundings, and detect the presence of food. In humans, much of the somatosensory cortex is devoted to processing touch signals from the hands and face - about 90%. Our touch senses in these "sensory hot spots" is correspondingly sensitive and high-resolution. A palm can detect the presence of a weight only weighing a fraction of a gram. Glabrous, that is, hairless skin, contains the finest receptors. Called mechanoreceptors, these translate physical force into nerve impulses. The main four mechanoreceptors in hairless skin areas are Pacinian corpuscles, Meissner's corpuscles, Merkel's discs, and Ruffini corpuscles. Different mechanoreceptors are specialized to detect different touch sensations, and can be found at a variety of different depths in the skin. Some mechanoreceptors, such as the Pacinian copulscule, which detects deep pressure touch and high frequency vibrations, are as large as 1 mm. Meissner's corpuscles, responsible for light touch, are about 20 times smaller, and located much closer to the surface of the skin. Free nerve endings, the most common type of skin receptor, are cell-sized, and do most of the work of the somatosensory system. The method of using a free nerve ending for touch reception is very old evolutionarily - the basic principle has not changed since the most primitive forms of multicellular life emerged about 600 million years ago.
Smell is not the most important sense, touch is the most important sense. Without touch, important involuntary functions would not function properly. Of all the senses, those who loose their sense of touch will typically not have a great life expectancy.When you loose your sense of touch, you also loose your sense of pain.You may be hurting your body and you may not even know it, because you can't feel anything.Science has shown that touch is necessary for life.touch your mate, when you get home.Most people would say sight comes second.
How do you get 1000000 robux for free?
Is it true that one human year is equal to seven dog years?
How many 3s in 313433535333?
How do you spell water with 3 letters?
How old is Danielle cohn?
What is the worse galactocemia galactocemia type 1 2 or 3?
A teacher walks into the Classroom and says If only Yesterday was Tomorrow Today would have been a Saturday Which Day did the Teacher make this Statement?
What pokediger1 password in roblox?
How did chickenpox get its name?
What is doomscrolling?
How did the Wiffle Ball get its name?
Do schools still teach cursive writing?
Can eggs break inside a chicken?
Why do books come out in hardback first?
What happens when a beehive gets too full?
What is the difference between an optometrist and an ophthalmologist?
What may be development for one may not be development for the others justify the statement with suitable examples?
Is Quentin Somerville related to Julia Sommerville?
Which of the following statements is true about storing classified documents?
What is the meter of manang biday?
Ano ang kahulugan ng iskolarling pagpapahayag?
What happened to Little Juan Burritos?
What is meant by a frequency response curve of an acceptor circuit?
What two generalization can be made about North America at the time of European discovery?
Copyright © 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.