The long head of Biceps Brachii muscles arises from which of the following?

Appeared in: AIIMS Bhopal NO - 2018 (Shift-1st)

Explanation

The long head of the biceps brachii muscle originates from the supraglenoid tubercle, a small projection on the scapula located superior to the glenoid fossa.
Its tendon is unique as it passes through the capsule of the glenohumeral (shoulder) joint before descending in the intertubercular sulcus of the humerus.
This anatomical arrangement allows the long head of the biceps to contribute not only to forearm flexion and supination but also to the stability of the shoulder joint.

Option A: The infraglenoid tubercle is the origin for the long head of the triceps brachii muscle, which is an antagonist to the biceps brachii.
Option C: The coracoid process is the origin for the short head of the biceps brachii, not the long head. It also serves as an attachment for the coracobrachialis and pectoralis minor muscles.
Option D: The lateral epicondyle of the humerus is the common origin for the extensor muscles of the forearm, which are responsible for extending the wrist and fingers.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of the shoulder girdle, specifically the origin of the biceps brachii muscle as background academic context rather than a clinical decision trigger.
Knowledge of these specific muscle origins is critical for diagnosing and understanding shoulder pathologies like SLAP (Superior Labrum Anterior to Posterior) tears, which involve an injury to the labrum where the long head of the biceps tendon attaches.
During physical assessment, tenderness over the bicipital groove can indicate biceps tendonitis, an inflammation of the long head tendon.
Surgeons use these bony landmarks (supraglenoid tubercle, coracoid process) for orientation during shoulder arthroscopy and other surgical procedures to avoid iatrogenic injury.

How to Approach the Question

This is a factual recall question from anatomy.
Identify the key muscle and part specified: 'long head of Biceps Brachii'.
The question asks for its 'origin' (where it 'arises from').
Mentally visualize the shoulder joint and the scapula.
Differentiate between the key landmarks around the glenoid (the shoulder socket): 'supraglenoid' (above the glenoid) and 'infraglenoid' (below the glenoid).
Recall the mnemonic: 'Supra' for superior, where the biceps long head originates; 'Infra' for inferior, where the triceps long head originates.

Concept Tested & Keywords

Concept Tested: Anatomy of the shoulder girdle, specifically the origin of the biceps brachii muscle.
Stem keywords: long head, Biceps Brachii, arises from, origin
Lead-in keywords: which of the following

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E6 Anatomy Grays 43e Vol 2 Part 2 pp. 95-97, 96-98

Practise the full AIIMS Bhopal NO - 2018 (Shift-1st)

Attempt every question from this paper in a timed mock, then review the full solution for each one.