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Fibro-osseous
junction
The greatest stresses to the
ligaments and tendons are where they attach to the bone, the fibro-osseous
junction. The most sensitive structures that produce pain are the
periosteum (covering of the bone) and the ligaments. It is important to note
that in the scale of pain sensitivity (which part of the body hurts more when
injured), the periosteum ranks first, followed by ligaments, tendons, fascia
(the connective tissue that surrounds muscle), and finally muscle.
The blood supply to the ligaments is the worst at the point where
the ligament attaches to the bone, called the fibro-osseous
junction.
Ligament and tendon relaxation occurs when the
fibro-osseous junction to bone do not regain their normal tensile strength after sprain
and lacerations, and when the attachments are weakened by decalcification from
disease, menopause and aging."
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