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Research

The Information Pathways

The Information PathwaysSpecialized neurons carry messages from the skin, muscles, joints, and internal organs to the spinal cord about pain, temperature, touch, vibration, and proprioception. These messages are then relayed to the brain along one of two pathways: the spinothalmic tract and the lemniscal pathway. These pathways are in different locations in the spinal cord, so an injury might not affect them in the same way or to the same degree.

Each segment of the spinal cord receives sensory input from a particular region of the body. Scientists have mapped these areas and determined the "receptive" fields for each level of the spinal cord (see illustration). Neighboring fields overlap each other, so the lines on the diagram are approximate.



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Continue Christopher Reeve's LegacyPhoto by Timothy Greenfield-Sanders