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How does the nervous system determine the location of a touch on the skin?

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Meissner's corpuscle; mechanoreception — Mechanoreception In human skin, specialized nerve endings known as Meissner's corpuscles (or tactile corpuscles) are sensitive to touch. They are one of several different types of mechanoreceptors found in human skin.

The nervous system determines the location of a touch on the skin through a combination of anatomical arrangement, overlapping sensory inputs, and neural processing mechanisms.

Localization relies on the specific distribution of nerve fibers within the skin and underlying connective tissue. Any single point on the skin is supplied by multiple nerve fibers—ranging from three to as many as forty—and no two points share the exact same pattern of fiber activation. Furthermore, the body surface is organized into dermatomes, which are strips of skin served by specific spinal nerves. Because these dermatomes overlap, the nervous system can integrate inputs from multiple sources to pinpoint a location.12

To sharpen this discrimination, the nervous system employs a process called surround inhibition, where an inhibitory area surrounding an excited region enhances contrast. Ultimately, this sensory information is transmitted to the thalamus and the cerebral cortex, where a precise, point-for-point representation of the body surface allows the brain to map the exact site of the stimulus.12