Sulcus Sign test is a shoulder stability examination to determine if there is anterior or multidirectional instability observed between the acromion and the humeral head.
- Patient seated or standing with arm hanging at side
- Examiner observes from anterior
Positive Abnormal prominence of acromion & groove like depression below acromion → Inferior instability, glenohumeral dislocation, atrophy of the deltoid muscle.
Graded by measuring from inferior margin of acromion of humeral head
|I||1< cm inferior translation|
|II||1-2 cm inferior translation|
|III||>2 cm inferior translation|