Weak Serratus Anterior

In the third test the patient is in a seated or supine position with his arm flexed 90-100 degrees and his elbow fully extended. Or due to damage to the nerve from pressure lesions or a neuritis inflammation of the nerve.

The Most Neglected Muscle During Exercise The Serratus Anterior Muscle Anatomy Anatomy Anatomy Physiology

Individuals with serratus anterior weakness or paralysis will typically complain of pain in the shoulder region around the shoulder blade and up into their neck.

Weak serratus anterior

. Serratus Anterior Strength Test or Push Out Test is used to examine the serratus anterior muscle weakness and scapula winging. Sometimes its referred to as the boxers. 1 If this muscle becomes weak or fatigued it can lead to unwanted movement within the shoulder joint excessive humeral elevation and anterior translation poor mechanics and eventual injury such as an impingement or rotator cuff tear.

Serratus anterior weakness was highlighted as detrimental with the model unable to fully solve the loadsharing redundancy in its absence and forces at the elbow and glenohumeral joint and in other muscles were found to be profoundly increased. The serratus anterior muscle spans the upper eight or nine ribs. Serratus anterior is a muscle on the front medial part of the scapula and inserts onto the first eight ribs.

A weak serratus anterior would result in the patient failing to resist the therapists force resulting in the shoulder breaking into adduction and the scapula cant rotate upwards significantly. When the condition is just starting some individuals will suffer more intense nerve pain for a few days and their pain will settle down as the paralysis progresses. There are numerous things that may lead to a weak serratus anterior.

First off the serratus anterior provides some of the necessary support for your shoulder blades to stay in a neutral position with your arms by your side. This last issue is a particular concern as it can lead to a backlog of toxins in the breast tissue and lymph nodes. If its weak the body goes looking for another way to accomplish the movement and the next muscle in line is the upper trapezius.

For one you may have been born with the condition. Having a weaker serratus anterior may not initially prevent you from accessing certain postures but over time its lack of strength can exacerbate muscular imbalance which may lead to muscle injuries. The serratus anterior isnt the only upward rotator of the shoulder blade its just the best one.

Or more likely any number of injuries at some point in your life could have affected the long thoracic nerve and caused weakness to happen so gradually over time that you didnt realize it quickly enough. When weak it can be implicated in Scapular Wing. Outstretching your arms place ab wheel on wall and step back a few inches so that youre leaning forward into the wall Protract the scapulae slightly to activate your serratus anterior Slowly roll up the wall shrugging your shoulders to elevate your scaps as you do Go as far up as you can then.

This is an uncommon condition and may arise from traumatic injury to the nerve supplying the serratus anterior muscle the long thoracic nerve. The serratus anterior is a broad flattened sheet of muscle originating from the first nine ribs and passes posteriorly around the thoracic wall before inserting into the costal surface of the medial border of the scapula The serratus anterior has three functional components 4 8The superior component originates from the first and second ribs and inserts into the. This muscle helps you rotate or move your scapula shoulder blade forward and up.

When one talks about winging of the scapula true winging is due to serratus anterior muscle dysfunction. When the serratus anterior muscles are weak they contribute to neck problems rotator cuff issues numbness down the arm poor circulation and lymphatic return through the armpits. Also the serratus anterior assists in keeping the shoulder blade close to your rib cage and prevents it from winging out to the side.

If your serratus anterior muscle is weak and lengthened it can contribute to an increased rounding of the shoulders and your shoulder blades may sit further away from your spine.

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