Long Thoracic Nerve Injury

The long thoracic nerve originates in the neck just above the collarbone and travels down through the armpit to supply muscles that help stabilize and control the shoulder blade. A long thoracic nerve injury, also called long thoracic neuropathy, occurs when this nerve becomes irritated or injured, most commonly near the neck.

While direct trauma can affect the nerve, symptoms more often develop from repetitive activity or exercise—especially movements that involve raising the arm overhead while the head is turned away. Strenuous activities such as heavy weightlifting may also contribute. Symptoms can include arm pain, rapid muscle fatigue, and difficulty with pushing, pulling, or lifting, particularly when the arm is above shoulder height. In longer-standing cases, weakness of the shoulder blade muscles may lead to visible protrusion of the shoulder blade, known as scapular winging.

Management typically begins with conservative care, including hands-on therapy and guided rehabilitation. Recovery can be slow, and progress often occurs gradually over time. While many people improve with conservative management, some cases may not fully resolve and may require referral for further medical or surgical assessment.

Understanding Long Thoracic Nerve Injuries

When shoulder blade stability is affected

Long thoracic nerve injuries are less common than many shoulder conditions, but they can have a noticeable impact on shoulder function and endurance. Because this nerve plays a key role in controlling the shoulder blade, irritation or injury can lead to weakness, fatigue, and difficulty with everyday tasks that involve lifting or pushing.

At Trenton Integrative Health Centre, we help patients understand what's contributing to their symptoms and what to expect during recovery.

What Is the Long Thoracic Nerve?

The long thoracic nerve begins in the neck and travels down to supply muscles that help hold the shoulder blade flat against the rib cage. These muscles are essential for smooth, coordinated shoulder movement—especially during overhead activity.

When the nerve is irritated or injured, the muscles it supplies may not function properly, leading to weakness or instability of the shoulder blade.

Common Causes

Long thoracic nerve irritation is most often related to:

• Repetitive overhead or reaching activities
• Exercises performed with the arm elevated, and the head turned away
• Heavy or repetitive weightlifting
• Prolonged or awkward postures involving the neck and shoulder

Direct trauma is less common but can also be a factor.

Common Symptoms

Symptoms may include:

• Aching or discomfort in the arm or shoulder
• Rapid fatigue with use of the arm
• Weakness with pushing, pulling, or lifting
• Difficulty with overhead activities
• Visible shoulder blade "winging" in more advanced cases

Symptoms often worsen with activity and improve with rest.

Why Recovery Can Take Time

Nerve-related conditions often heal more slowly than muscle or joint injuries. Improvement typically happens gradually, and progress may be measured in small but meaningful gains in strength, endurance, or control.

Early assessment and activity modification can help reduce ongoing irritation and support recovery.

How Long Thoracic Nerve Injuries Are Managed at TIHC

Care focuses on reducing stress on the nerve while supporting shoulder blade stability and overall movement quality. Management may include:

• Hands-on therapies to address contributing neck and shoulder tension
• Activity modification to reduce nerve irritation
• Targeted rehabilitation exercises to improve shoulder blade control
• Education on posture and movement patterns

Care plans are individualized and adjusted as recovery progresses.

What to Expect

Many people experience gradual improvement with conservative care, though recovery timelines vary. In some cases, symptoms may persist despite appropriate management, and further medical or surgical evaluation may be considered.