Shoulder Assessment

AC Resisted Extension Test | Acromioclavicular Joint Pathology

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AC Resisted Extension Test

AC Resisted Extension Test | Acromioclavicular Joint Pathology

The AC Resisted Extension Test is a common orthopedic test to assess for Acromioclavicular Joint Pathology.

According to a study done by Christopoulos et al, the AC resisted extension test has a sensitivity of 72% and a specificity of 85%. . It is designed to provoke a symptomatic AC joint. The authors do not recommend using this test as a stand-alone diagnostic tool, but it can be valuable if done in a cluster. Make sure to watch that video next by a click in the top right corner.

With the patient in sitting position elevate the arm to 90° of flexion. Now the patient is asked to resist horizontal adduction by pushing against the examiner’s hand. Again, a positive test will reproduce pain on top of the shoulder near the AC joint.

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Other common orthopedic tests to assess for AC Joint Pathology are:

Cross Body Adduction Test

Active Compression Test of O’Brien

AC Joint Line Tenderness

Paxino’s Sign

AC Shear Test

AC Joint Pain Cluster of Signs & Symptoms

AC Joint Provocation Cluster by Krill

AC Joint Provocation Cluster by Chronopoulos

References

Chronopoulos E, Kim TK, Park HB, Ashenbrenner D, McFarland EG. Diagnostic value of physical tests for isolated chronic acromioclavicular lesions. The American journal of sports medicine. 2004 Apr;32(3):655-61.

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