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The tactile system interprets touch and the perception thereof. It protects us from stimuli that may be perceived as harmful. With an over/under sensitive tactile system, the body interprets touch differently. When this occurs, due to certain types of clothing, food textures or unexpected touch, the body elicits an excessive emotional reaction such as hitting, crying or other behaviors. This is then referred to as tactile defensiveness.
Stereognosis is the ability to interpret and identify size, shape and textures of objects in our environment. It is the second part of the tactile system. ex. Being able to tell the difference between a coin and a key without seeing the object.
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