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Is tactile perception two-dimensional or three-dimensional? Can tactile sense be mapped on 2-dimensional map of the...

Is tactile perception two-dimensional or three-dimensional? Can tactile sense be mapped on 2-dimensional map of the surface of the human body or does human receive tactile signal as a 3D position (owing that internal organs can also feel pain)?

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Answer #1

It's not 2D: Tactile perception can very simply understand a ring around your finger. If you projected the skin of your body onto a 2D plane there would be a way to represent this sensation, but only as an irregular shape. So you need a third dimension to cognitively process this sensation.

But Phantom pain tells us the brain doesn't always register tactile perception from a true 3D mapping. For example a person without an arm could feel pain in a finger that doesn't exist. Not always, but sometimes.

So it's greater than two, and sometimes three doesn't fully describe the known phenomena. Therefore it's (at least) 4-D.

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Answer #2

Tactile perception can be considered to be three dimensional because of the 3D perception of the senses.

The tactile signal cannot be mapped on 2-dimensional map of the surface of the human body. The percept of the total tactile sensory stimuli is 3D.

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