The Biceps Brachii can be considered as two separate muscles joined together by tough midline fascia. The long head of biceps (LHB) gives about 15% of the power to the muscle. It is implicated in just about every shoulder issue that presents clinically. The LHB tendon is thick and long and runs up the humerus in the bicipital grove and inserts in the upper part of the labrum of the joint. In terms of trigger point referred pain, trigger points in the Biceps Brachii tend to produce localized pain with intense ellipse superficially located over long head tendon. Referred pain into anterior cubital fossa.
MUSCLE COMMENT
The Biceps Brachii operates over three joints. It has two tendinous heads at its origin and two tendinous insertions. Up to 20% of the population have up to five supernumerary heads, mainly from the short head. The Biceps Brachii decelerates extension and pronation at the elbow and extension at the shoulder joint. It acts as a junction providing myofascial continuity between the thumb and the ribcage (especially obvious when the upper limb is abducted). The muscle plays a vital role in shoulder stability under dynamic conditions, and works reciprocally with the Triceps Brachii to stabilize the elbow.
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