THEORY | Subacromial Impingement

The video tutorial discusses three types of shoulder impingement: subacromial, secondary, and internal. It explains the mechanisms and causes of primary impingement, including mechanical factors and muscle imbalances. The video also covers diagnostic tests for primary impingement and compares secondary and internal impingement, highlighting differences in symptoms and underlying causes. Secondary impingement is associated with laxity and instability, while internal impingement involves posterior shoulder pain and is common in athletes.

What is the primary mechanism that leads to primary impingement?

• Weakness in the deltoid muscle

• Increase in subacromial space

• Superior translation of the humerus

• Tightness in the biceps tendon

Which of the following is NOT a cause of primary impingement?

• Posterior capsule tightness

• Type 3 acromion morphology

• Excessive laxity in the shoulder

• Rotator cuff tendinopathy

Where is the pain typically located in primary impingement syndrome?

• Medial elbow

• Lateral or anterolateral shoulder

• Lower back

• Posterior shoulder

Which test is NOT part of the test item cluster for primary impingement?

• Drop arm test

• External rotation resistance test

• Painful arc test

• Hawkins Kennedy test

What differentiates secondary impingement from primary impingement?

• Pain with overhead activities

• Generalized laxity and instability

• Involvement of the rotator cuff

• Presence of muscle imbalances

Which of the following is a characteristic of secondary impingement?

• Generalized laxity

• Weakness in the biceps tendon

• Pain localized to the elbow

• Stiffness in the shoulder joint

What is a key differentiating factor of internal impingement?

• Pain in the lateral shoulder

• Positive posterior impingement test

• Weakness in the deltoid muscle

• Tightness in the anterior capsule

Where is the pain located in internal impingement?

• Posterior shoulder

• Lateral shoulder

• Medial wrist

• Anterior elbow

What activity is commonly associated with internal impingement?

• Cycling

• Overhead throwing

• Running

• Swimming

Which condition involves aberrant scapular movements?

• Rotator cuff tendinopathy

• Internal impingement

• Primary impingement

• Secondary impingement