Internal Rotation Lag Sign

Discover the Internal Rotation Lag Sign Test, a vital tool for diagnosing rotator cuff injuries and ensuring effective shoulder joint assessments.

By Russell Tan on Jul 31, 2024.

Internal Rotation Lag Sign PDF Example

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What are rotator cuff tears?

Rotator cuff rupture refers to injuries to the group of muscles and tendons surrounding the shoulder joint, known as the rotator cuff muscles. These include the following:

Some examples of rotator cuff tears include rotator cuff rupture and subscapularis tendon tears. These tears can range from partial to full thickness tear and significantly affect shoulder function.

Risk factors and symptoms

Risk factors include repetitive overhead motions common in sports or certain occupations, acute injuries from falls or direct blows, and progressive wear and tear associated with aging. Having a family history of rotator cuff problems also contributes to the likelihood of rotator cuff rupture. Symptoms typically include persistent shoulder pain, especially at night or when lifting objects, weakness in the affected arm side, and limited shoulder movement. People might notice a crackling sensation when moving the shoulder in certain ways.

How to diagnose rotator cuff tears

Diagnosing rotator cuff tears involves a clinical diagnosis that begins with a detailed medical history and physical examination and screening, where doctors assess pain levels, range of motion, and muscle strength. Imaging tests play a crucial role in diagnosing rotator cuff, with ultrasound and magnetic resonance imaging (MRI) commonly used to visualize the extent of the tear and the condition of surrounding tissues.