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Stereognosis (Tactile Gnosis) is defined as the ability to tell the difference and identify objects via touch in the absence of visual or auditory contact. The subject will need to be able to recognize temperature, spatial properties, texture, and size to reach an accurate conclusion to what the object is. [ 13 ]
Haptic perception (Greek: haptόs "palpable", haptikόs "suitable for touch") means literally the ability "to grasp something", and is also known as stereognosis. Perception in this case is achieved through the active exploration of surfaces and objects by a moving subject, as opposed to passive contact by a static subject during tactile perception. [1]
This sensory information is transmitted by the posterior column-medial lemniscus pathway of the spinal cord, which also carries the sensations of fine touch, stereognosis, tactile pressure, graphesthesia, texture recognition, kinesthesia, two-point discrimination, proprioception, and vibration.
Graphesthesia can be considered as a type of synthetic sensation as it involves a complex interaction between three neural components i.e. Tactile sensation, two point discrimination and cortical component that stores infirmation about the symbol/letter that is being traced in the skin and was learned through some previous experience.
Astereognosis (or tactile agnosia if only one hand is affected) is the inability to identify an object by active touch of the hands without other sensory input, such as visual or sensory information. An individual with astereognosis is unable to identify objects by handling them, despite intact elementary tactile, proprioceptive, and thermal ...
Tactile technology presents a way to use advances in technology and combined with touch. Studies show that humans work and learn better in a multi-sensory environment. Something as simple as having toys (like the fidget spinner ) in the workplace, or using physical props to teach children in schools, can have significant impacts on productivity ...
Tactile signing is a common means of communication used by people with deafblindness. It is based on a sign language or another system of manual communication. "Tactile signing" refers to the mode or medium, i.e. signing (using some form of signed language or code), using touch.
[2] [3] Experiments involving ablation of the second somatosensory cortex in primates indicate that this cortical area is involved in remembering the differences between tactile shapes and textures. [ 4 ] [ 5 ] Functional neuroimaging studies have found S2 activation in response to light touch, pain, visceral sensation , and tactile attention.