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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.
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What is related to sense of touch?
Sense of fell is related to sense of touch.
Is touch a chemical sense?
Touch is actually not considered to be a chemical sense. Touch is actually considered to be a physical type sense.
Why does your touch phone not work with your gloves on?
because it is heat sensitive with gloves on it wont sense your heat
How does touchpads use sensors?
What touch pads sense is heat and pressure. For example, if you place a pen on the touch pad of a laptop or other computer, it will not do anything but if you touch it with your finger, it will work.
What is the medical term meaning diminished sense of touch?
Hypoesthesia is the term of a diminished sense of touch.
What helps the raccoon get it food?
The raccoon primarily uses its sense of smell, along with its sense of hearing to find food. It uses its sense of touch to locate food in water.
How do clams eyes work?
They don't have eyes. You can examine one to see if there is any clam eyes. They sense from smell and touch.
What is a sense appeal?
A sense appeal is when you let someone touch you ;)
Which is the first sense to be fully developed?
The sense of touch is the first sense to be fully developed in humans. It begins to develop in the womb and is already functional at birth.
Who are the different specialists of the different senses?
Opthamologists specialize in vision (sense of sight), audiologists in hearing (sense of hearing), dermatologists in touch (sense of touch), and sommeliers in taste (sense of taste).
What is a sense used when handling something?
The sense of touch is used when handling something. It allows us to feel the texture, weight, temperature, and shape of objects.
What is crude touch?
the opposite of fine touch, so it will be a more rough sense of touch. E!
