When it comes to feeling pain, touch or an itch, location matters

When you touch a hot stove, your hand reflexively pulls away; if you miss a rung on a ladder, you instinctively catch yourself. Both motions take a fraction of a second and require no forethought. Now, researchers have mapped the physical organization of cells in the spinal cord that help mediate these and similar critical 'sensorimotor reflexes.'

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