Rockwood Adults CH34

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CHAPTER 34 • Glenohumeral Instability

C

D

Figure 34-5.  ( Continued ) C and D: External rotation is measured with the arm at the side and in 90 degrees of abduction.

A

B

Figure 34-6.  Internal rotation measurement is done with the arm in 90 degrees of abduction with the scapula stabilized ( A ) and also with the arm at the side ( B ). With the arm at the side, the lumbar or thoracic vertebral level that is reached by the thumb is documented.