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The Biceps Brachii is so-called to distinguish it from the brother Biceps Femoris as the adjectives Brachii and Femoris indicate their allocation and connection with the Humerus (arm) and Femur (leg) bone respectively.
This is the first post of a long series of posts that will reveal the lesser-known functions of our muscles.
In fact, almost every muscle in our musculoskeletal system performs more than one movement related to one or two joints.
Specifically, this post will analyze the functions of the Biceps Brachii which is the most important muscle of our arm.
The Biceps Brachii is a bi-articular muscle as it is connected with two joints:
The biceps femoris consists of two muscle strands (spindles):
The long head originates in the supraglenoid tuberculum of the scapula.
The short head originates at the apex of the coracoid process.
Both the Long and short heads joint to form a common muscle belly and they attach through a common tendon into the tuberosity of the radius ( medial aspects of the radius bone ).
The Biceps Brachii has innervated by the Musculocutaneous nerve ( C5, C6, C7 ).
Since the Biceps Brachii has its origin and insertion in three different points It crosses the elbow and the shoulder joints, and it can make more movements of both the arm and the forearm.
The main actions of the Biceps Brachii are:
There are different points of the biceps brachii muscles’ structure that can be affected from muscle or tendon rupture. These different ruptures point can lead to partial or total loss of function.
We can have 3 main tendon ruptures:
Muscle tears or strain generally occur at the shoulder end, in the proximity of the tendons. Generally, they don’t require surgical treatment.
The most common symptom of biceps tendon rupture is pain in the upper or lower arm, which can lead to bruising, muscle spasms, or loss of mobility and strength.
The image below shows a long head’s rupture. The bruising comes from damage following rupture of the tendon. It doesn’t show up here really well, but there is commonly a “popeye” effect of the biceps, bulging abruptly on the middle portion of the humerus.
Biceps Brachaii Muscle injuries can be diagnosed accurately with the following medical diagnostic methods:
An X-ray can be a useful medical diagnostic, in the case there is a full tendon detachment in the insertional area of the tendon interested (possible bone detachment).
Tears of the biceps tendon at the elbow are uncommon and most often result from lifting heavy weights. This rupture requests surgical treatment to reattach the tendon to the bone and regain full arm strength and function.
Between tears at the biceps, the tendons at the shoulder are more common than those at the long head.
For most people, surgical treatment of the Long Head is not necessary as mild arm weakness or arm deformity does not typically bother most patients.
However, those who develop cramping or pain in the muscle, or who require complete recoveries of the strength, such as athletes or manual labourers, may benefit from the surgery.
Muscle strain and tears of the biceps brachii can be treated with a sports therapy, such as a Sports Massage to ease the muscle stiffness and trigger points that have led to the muscle strain or tear.Â
In our sports injury clinic in London, we have designed a specific treatment for adhesions and scar tissue after the Biceps Brachii Muscle tear.
When treating a biceps injury it is important to treat all the other muscles that have the same actions, such as Coracobrachialis Muscle, Brachialis Muscle, Deltoid Muscles, and Pectoralis Major Muscle. In fact, they could be the causes of the biceps’ excessive strain both because of their weakness or stiffness.
If you get a Biceps Brachii injury, seek the help of a specialized Sports Therapist or of your doctor and avoid self-treatment.
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