Resisted AC Joint Extension Test
Original Editor - Evan Thomas
Resisted AC Joint Extension Test (or the AC Resisted Extension Test) is used to help identify acromioclavicular joint pathology in both traumatic and non-traumatic/chronic overuse cases, and can be useful in helping differentiate between AC joint and impingement syndromes.
- The patient is seated with the therapist standing behind him/her
- The patient's shoulder is positioned into 90 flexion and internal rotation, with the placed into 90 flexion
- The therapist places his/her hand on the patient's elbow and asks him/her to horizontally abduct the arm against isometric resistance
- A positive test is pain at the AC joint
|Positive Predictive Value (%)||20|
|Negative Predictive Value (%)||98|
Test Item Cluster:
This test can be combined with the Cross Body Adduction Test and O'Brien's Active Compression Test as part of a cluster.
|Sensitivity (%)||Specificity (%)||Positive Predictive Value (%)||Negative Predictive Value (%)|
|Positive in 3/3||25||97||31||96|
|Positive in 2/3||81||89||28||99|
|Positive in 1/3||0||74||17||100|
- Miller MD & Thompson SR. DeLee & Drez's Orthopaedic Sports Medicine (4th Ed). Philadelphia, PA: Elsevier.
- Frontera WR, Silver JK, Rizzo TD (Jr). Essentials of Physical Medicine and Rehabilitation (3rd Ed). Philadelphia, PA: Elsevier.
- Cook CE & Hegedus EJ. Orthopedic Physical Examination Tests: An Evidence-Based Approach (2nd Ed). Boston, MA: Pearson.
- Physiotutors. Cross Body Adduction Test | Acromioclavicular Joint Pathology. Available from: https://www.youtube.com/watch?v=DKLvt816x6o
- Chronopoulos E1, Kim TK, Park HB, Ashenbrenner D, McFarland EG. Diagnostic value of physical tests for isolated chronic acromioclavicular lesions. Am J Sports Med, 2004; 32(3): 655-61.
- Physiotutors. AC Joint Provocation Cluster | Acromioclavicular Joint Pathology. Available from: https://www.youtube.com/watch?v=npHPXrV6_JI