sulcus sign


sulcus sign

Orthopedics A joint laxity test used clinically to diagnose shoulder instability. See Laxity test, Shoulder instability. Cf Provocative test.

sul·cus sign

(sŭl'kŭs sīn) A maneuver used to determine inferior instability of the glenohumeral joint, whereby traction is applied to the humerus. If the space widens between the acromion process and humeral head to produce an indentation, a positive test result is confirmed.