How does an overactive right scalene, as occurs in Superior T4 Syndrome, affect the right ribs, the left ribs and the vertebrae?

• A. Right lower ribs externally rotate; left lower ribs externally rotate; T5-T8 rotate to the left.
• B. All ribs rotate identically with no vertebral rotation.
• C. Right upper ribs externally rotate; left upper ribs internally rotate; T1-T4 rotate to the right; lower right ribs internally rotated.
• D. Right upper ribs internal rotation; left upper ribs external rotation; T1-T4 rotate to the left.

Answer: (C)