Room to Move
What is it about chiropractic care that makes it so effective?
Patients swear by the spinal adjustments they receive from their
chiropractor, but often don't know how the manipulation is helping,
other than a general knowledge that their backs have been
"cracked."
Adhesions in the hinge joints of the vertebrae, called the facet
joints, may be one reason for back pain. Adhesions, or joints being
improperly stuck together, can be caused by reduced mobility from
injury or inactivity. Chiropractic spinal manipulation
theoretically separates the facet joints and increases the space
between them, breaking adhesions and restoring motion. One of the
most common spinal adjustments performed by chiropractors - the
side-posture adjustment - involves positioning a patient on his or
her side, then rotating the upper body using the shoulder and hip
as levers. From here, an adjustment is made with a slight twisting
of the spine.
In a study in the journal Spine, 64 men and women ages 22-30
without back pain were divided into four groups for varying
treatment interventions, involving placing patients in side-posture
position only (without performing an adjustment), providing actual
side-posture spinal adjusting, or leaving patients in a neutral
position. MRI scans were taken before and after interventions, in
side-posture position or with people lying on their backs, and
compared for each individual.
People given side-posture adjustments followed by MRI in
side-posture position showed the greatest separation in the facet
joints. Those in side-posture position alone, without adjustments,
showed the second-greatest separation before and during MRI.
Side-posture adjusting clearly created greater separation than no
adjustments. The average difference in separation between neutral
group subjects' facet joints and the group receiving side-posture
adjustments was only a few millimeters, but the authors called this
amount "not only significant," but also "clinically relevant."