Yergason Sign is a functional test of the long head of the biceps tendon disorders.
This test may be negative with partial or complete rupture of the supraspinatus tendon.
How it’s Performed?
The patient’s arm is alongside the trunk and flexed 90° at the elbow.
One of the examiner’s hands stabilizes the elbow while the other hand grasps the patient’s forearm as if to shake hands.
The patient is asked to supinate the forearm against the examiner’s resistance. This places isolated tension on the long head of the biceps tendon.
What does a positive Yergason Sign mean?
Pain in the bicipital groove is a sign of a lesion of the biceps tendon, its tendon sheath, or its ligamentous connection via the transverse ligament.
The typical provoked pain can be increased by pressing on the tendon in the bicipital groove.
Sensitivity & Specificity
A Prospective blinded study by Richard Holtby1 to assess the accuracy of the Speed’s and Yergason’s tests in detecting biceps pathology, he found that the sensitivity and specificity of Yergason test was as following:
Biceps brachii Muscle had two heads (Short head and long head)
The Short head originates from the Coracoid process, while the long head originates from Supraglenoid rim of the shoulder.
It inserts onto Radial tuberosity.
Its action includes Supination and flexion of the forearm.
It’s innervated by the Musculocutaneous nerve.
Richard Holtby, Helen Razmjou: Accuracy of the Speed’s and Yergason’s tests in detecting biceps pathology and SLAP lesions: comparison with arthroscopic findings. 2004 Mar;20(3):231-6. doi: 10.1016/j.arthro.2004.01.008. PMID: 15007311.
Campbel’s Operative Orthopaedics 13th Book
Clinical Tests for the Musculoskeletal System 3rd Edition.
Dutton’s Orthopaedic Examination, Evaluation, And Intervention 3rd Edition.