Lower Back Pain
Traditionally we have thought of pain as a signal transmitted from
the periphery to the brain – such as when a finger touches a hot plate.
This understanding of pain serves well for very brief acute pain;
however, it is only a small part of the story when pain is longer
lasting.Just as there are nerve tracts that carry pain signals upward to the
brain, there are also tracts coming down from the brain that regulate
the sensitivity of the spinal cord and thus determine how much pain we
perceive. These tracts can amplify pain – making a trivial stimulation
seem terrible – and can block it, which probably explains why
quarterbacks and combat soldiers can carry out remarkable activities,
and only after some time realize that they’ve been injured.
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