Hyperlordosis of the lumbar spine
Frames:
1. Normal shape
2.
                    Hyperlordosis: the Lumbar spine is too far forwards and
                    the pelvis is tipped forwards.
                    Likely
                    to cause pain across the low back due to excessive weight bearing
                  in the red zones.
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Displacement of the 5th lumbar vertebra
Frames:
1. Normal shape
2.
                  5th Lumbar vertebra displaced to the right.
                  Likely to cause pain on one side spreading into the
                  Sacro-iliac joint, up the spine and down the back of the leg
                  as Sciatica.
3. Spread of pain and spasm along the spinal muscles
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Frames:
1. Normal shape
2.
                  Left Sacro-iliac joint strain.
                  Likely
                  to cause great pain and widespread muscle spasm as well as
                  Sciatica.
3. Close-up of a cross-section through the Sacro-iliac joints in their usual, painful displacement pattern.
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Movement of the sacro-iliac joints
Frames:
1. The position of the Sacro-iliac joint when we are standing up straight
2. The postion of the Sacro-iliac joint when we are lying on our backs.
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Sacro-iliac joint pain
Frames:
1. Normal shape
2.
                  Right Sacro-iliac joint strain.
                  Often
                  caused by a long term tendency to rest on the same buttock
                  when seated.
Click here for Interactive anatomy of this area