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Suprascapular nerve entrapment is an underdiagnosed cause of chronic shoulder pain and weakness, especially in athletes involved in overhead activities. It controls two major muscles of the shoulder (the supraspinatus and infraspinatus), originates in the neck (C5–C6 roots), passes behind the scapula, and reaches the muscles of the back of the shoulder.

In athletes (volleyball, tennis, swimming, throwing) or people with heavy manual labor (overhead activity), repetitive motion pulls on the nerve and irritates it. In others, a large tear in the rotator cuff muscles may be to blame, pulling the nerve backward.

Example from everyday life. Imagine a 28-year-old volleyball player who can no longer serve hard: he feels severe pain in the back of his shoulder, weakness when he raises his arm, and sees that the muscle behind the shoulder blade has atrophied. Or a swimmer who has difficulty crawling and is in severe pain at night. These are classic cases of supraspinatus nerve entrapment – ​​often underdiagnosed, but when detected, the solution is effective.

Superspinatus nerve entrapment is not common, but when it does occur, it explains why the pain and weakness “do not go away”. Arthroscopic release is currently the preferred method, being a safe and effective procedure that changes the lives of patients with entrapment, offering a faster recovery compared to the open technique. Arthroscopic decompression of the suprascapular nerve should be considered in any case of persistent shoulder pain with electromyographic findings or muscle atrophy, especially in athletes.

Entrapment of the suprascapular nerve was first described in 1931 by Kopell and Thompson, but surgical treatment became popular after the work of Lafosse in 2007. Today it is recognized as a cause of pain in 1-2% of patients with shoulder pain, while in athletes with throwing or overhead movements the percentage reaches 5-8%.

The nerve (C5-C6) can be entrapped in two main locations: the suprascapular notch (below the transverse scapular ligament – ​​TSL) and the spinoglenoid notch (often due to a cyst from a SLAP lesion). Compression at the first point causes weakness and atrophy of both the supraspinatus and infraspinatus tendons, while at the second point only the infraspinatus.

Conservative treatment (physical therapy, NSAIDs, injections) is successful in 60-70% of cases when there is no increased pressure. In case of failure >6 months or severe atrophy, surgical decompression is indicated. The arthroscopic technique is superior to the open technique due to less pain, better vision and faster return to activities.

Pathophysiology – Etiology

Entrapment is mainly mechanical (compression by ligament, cyst, bone, retraction of massive rotator cuff tear). In athletes, overuse syndrome (traction neuropathy) prevails. In massive tears with retraction >3 cm, the nerve undergoes intense traction up to 20-30%.

Main symptoms: deep posterolateral shoulder pain (nocturnal), inability to abduct and externally rotate, supraspinatus/infraspinatus fossa atrophy (classic picture in volleyball/swimming athletes).

Arthroscopic release – how is it done?

The operation is performed arthroscopically and usually lasts 30–60 minutes. No implantable materials are placed, no muscles are cut.

After the operation – rehabilitation

• In the first week: sling (splint) for comfort, but not mandatory.
• From the 1st–2nd day: light movements (pendulum).
• 2–4 weeks: passive & active mobilization.
• 4–8 weeks: strengthening.
• 3–6 months: full return to sport/work (depending on the sport).

Advantages of the arthroscopic method

• Much less pain afterwards
• Quick discharge from hospital (usually 1 day)
• Quick recovery
• Can be done together with another operation (e.g. rotator cuff repair)
• Very low risk of nerve damage (if done correctly)

When does it NOT help that much?

• If the atrophy is very advanced (nerve atrophied for years)
• If there is no clear evidence of entrapment (EMG negative, no cyst)
• In some massive ruptures without neurological findings, the release routine does not always give → extra benefit

In conclusion, arthroscopic decompression of the supraspinatus nerve is currently a reliable and minimally invasive solution that transforms the lives of patients with entrapment – ​​especially athletes. With excellent clinical results, high rates of return to the previous level of activity and minimal complications, this technique deserves to be systematically included in the diagnostic and therapeutic algorithm of persistent shoulder pain. The correct diagnosis remains the key – and once established, the solution is now in our hands.