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“Though the back sufferer isn't aware of it, it is generally known by students of the spine that the last intervertebral disc, between the fifth lumbar vertebra and the sacrum, is more or less degenerated in most people by the age of twenty. Discs are structures located between the bodies of spinal bones to take up the shock. They are firmly attached to the vertebral bodies above and below, and in no way can they "slip." Enclosed by a tough, fibrous outer shell, there is a thick fluid inside, which is what absorbs the shock. The discs at the lower end and in the neck, because of all the activity in those locations, begin to wear out at an early age, some by the age of twenty, as stated. (page 118)” — John E Sarno, M.D
Though the back sufferer isn't aware of it, it is generally known by students of the spine that the last intervertebral disc, between the fifth lumbar vertebra and the sacrum, is more or less degenerated in most people by the age of twenty. Discs are structures located between the bodies of spinal bones to take up the shock. They are firmly attached to the vertebral bodies above and below, and in no way can they "slip." Enclosed by a tough, fibrous outer shell, there is a thick fluid inside, which is what absorbs the shock. The discs at the lower end and in the neck, because of all the activity in those locations, begin to wear out at an early age, some by the age of twenty, as stated. (page 118)