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The somatosensory cortex follows a specific proximal sequential order to process sensations from different parts of the body. Based on brain mapping, this organization proceeds sequentially through the following areas: genitals, toes, ankles, knees, hips, trunk, shoulders, elbows, wrists, hands, fingers, and thumbs. The sequence then continues to the neck, eyebrows and eyelids, eyeballs, face, lips, jaw, and tongue, culminating in regions dedicated to salivation, chewing, and swallowing.

Layout of the Somatosensory Cortex Map

A patient who has had their left hand amputated reports experiencing the distinct sensation of their missing hand being touched whenever they shave their face. Based on the known organizational layout of the brain's sensory map, what is the most likely explanation for this phenomenon?

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