A 28-year-old cricketer is found to have a type II SLAP (superior labrum anterior to posterior) lesion involving the long head of biceps brachii anchor. Which statement about the long head of biceps brachii is correct regarding its role in shoulder biomechanics?

• A It originates from the infraglenoid tubercle and is the prime mover of shoulder extension
• B It originates from the acromion and stabilizes the shoulder in overhead abduction
• C It originates from the coracoid process and is the primary shoulder internal rotator
• D It originates from the supraglenoid tubercle and superior labrum and contributes to humeral head depression ✓

Explanation

The long head of biceps brachii originates from the supraglenoid tubercle and superior glenoid labrum. It acts as a humeral head depressor and stabilizer, particularly in the cocking phase of throwing. Its contraction tenses the superior labrum, which is why SLAP tears involve this origin. The short head originates from the coracoid process, not the long head.

Reference: Rockwood and Green's Fractures in Adults, 9th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.