Long thoracic nerve palsy causes treatmentand its effect on the neck

Sometimes, a person may experience a strange pain in the shoulder or sudden weakness in the arm. Over time, they might notice that the shoulder blade (scapula) starts to protrude outward prominently, as if something is abnormal with the shoulder's movement. In this case, the underlying cause could be a condition known as Long Thoracic Nerve Palsy, a neurological issue that directly impacts shoulder stability and mobility.This condition doesn’t just affect the appearance of the back or shoulder; it can also lead to chronic pain and make simple daily activities—like raising your arm or carrying objects—highly challenging. Most importantly, many people mistake it for simple muscle strain or neck problems, which often delays proper diagnosis and treatment.In this article from Dalili Medical, we will explain what Long Thoracic Nerve Palsy is, its causes, treatment options, whether it can affect the neck, and the relationship between excess weight and the worsening of the condition.

What is Long Thoracic Nerve Palsy?

It is a neurological condition that occurs when the long thoracic nerve is injured or compressed, leading to weakness or paralysis of the serratus anterior muscle (العضلة المنشارية الأمامية). This results in a prominent protrusion of the shoulder blade, a clinical sign known as a "Winged Scapula" (الكتف المجنّح). It is commonly caused by sports injuries, direct pressure on the nerve, or as a surgical complication, and is usually treated using conservative methods like physical therapy and medications.

Is Long Thoracic Nerve Palsy dangerous?

It is not life-threatening, but it can significantly impact a patient's quality of life if left untreated, as it causes:

Impaired shoulder mobility.
Reduced arm strength.
Difficulty performing simple daily activities.

Does Long Thoracic Nerve Palsy appear suddenly or gradually?

It can present either way, depending on the underlying cause:

Suddenly (Acute): Typically occurs after a direct trauma, injury, or surgical procedure.
Gradually (Chronic): Develops over time due to repetitive strain on the nerve or minor, recurring inflammation.

Does Long Thoracic Nerve Palsy affect the neck?

Yes. In many cases, it indirectly affects the neck region. As the body attempts to compensate for the weakened shoulder muscle, it places extra stress on surrounding areas, leading to:

Neck muscle spasms and tension.
Upper back pain.
Strain on the opposite (healthy) shoulder.

Can it occur on both sides (Bilateral)?

Rarely. Long thoracic nerve palsy typically affects only one side. However, bilateral involvement may occur in rare cases, such as:

Certain systemic neurological disorders.
Severe or multi-regional trauma.
Systemic nerve inflammation affecting multiple nerves simultaneously.

Does sitting with a phone or computer cause this condition?

No, it is not a direct cause. However, prolonged poor posture while using phones or computers can:

Increase pressure on the neck and shoulder area.
Worsen symptoms if the nerve injury is already present.

Can sleeping in a wrong position worsen the condition?

Yes. Awkward or uncomfortable sleeping positions can exacerbate symptoms, particularly:

Sleeping on the affected shoulder for prolonged periods.
Adopting positions that put direct pressure on the scapula during sleep.

Does Long Thoracic Nerve Palsy cause numbness?

Typically, it does not cause direct numbness or loss of sensation, because the long thoracic nerve is purely a motor nerve (controls muscle movement, not sensation). However, patients may experience:

Occasional mild tingling sensations.
Radiating pain caused by muscle spasms in the surrounding neck and shoulder muscles.

Does excess weight affect the condition?

Yes, excess weight can have a negative impact. It can:

Increase mechanical strain on the shoulder girdle muscles.
Hinder the proper execution of physical therapy exercises.
Slow down the overall recovery process and delay mobility improvement.

Types of Long Thoracic Nerve Palsy

Long thoracic nerve palsy is classified into several types based on the cause, severity of the injury, and duration of symptoms:

1. Partial Palsy (الشلل الجزئي)

The nerve is damaged or irritated but not completely severed.
The serratus anterior muscle still functions, though weakly.
The winging of the scapula is mild to moderate.

2. Complete Palsy (الشلل الكامل)

The nerve completely loses its function.
The serratus anterior muscle is essentially paralyzed and non-functional.
A severe and highly visible protrusion of the shoulder blade occurs.

3. Acute Palsy (الشلل الحاد)

Symptoms appear suddenly.
Often follows a direct trauma, accident, or surgery.
Sharp, noticeable pain is typically present at the onset.

4. Chronic Palsy (الشلل المزمن)

Symptoms persist for a prolonged period, typically exceeding 6 to 12 months.
Leads to continuous weakness of the nerve and muscle.
Can eventually result in muscle atrophy (wasting away) over time.

5. Traumatic Palsy (الشلل الناتج عن إصابة مباشرة)

Caused by accidents, violent falls, or direct sports impacts.
Can also result from accidental surgical injury (e.g., during chest or armpit surgeries).
The impact on the nerve is immediate and direct.

6. Idiopathic or Inflammatory Palsy (الشلل الالتهابي أو العصبي)

Caused by nerve inflammation (neuritis) or viral infections.
May appear suddenly without any obvious physical injury.
Can sometimes be temporary and resolve as the inflammation subsides.

Causes of Long Thoracic Nerve Palsy

1. Direct Trauma and Injuries

This is one of the most common causes, including:

Motor vehicle accidents.
Severe falls.
Sports-related injuries (e.g., football, wrestling).
Direct blows to the shoulder or chest wall.

2. Repetitive Strain and Overuse

Can occur due to micro-trauma over time from:

Heavy weightlifting or strenuous exercise.
Carrying heavy loads or backpacks for extended periods.
Repetitive overhead arm movements (common in occupations like painting or plastering).

3. Surgical Complications

The nerve can occasionally be stretched or injured during surgical procedures near its pathway, such as:

Mastectomies (breast cancer surgery).
Thoracic (chest) surgeries.
Axillary lymph node dissections (under the armpit).
Certain shoulder surgeries.

4. Viral or Neurological Inflammation

Certain infections or viral illnesses can trigger immune responses that cause:

Temporary weakness or inflammation of the nerve (such as Parsonage-Turner Syndrome).
Sudden onset of shoulder pain followed by weakness.

5. Nerve Compression

Pressure on the nerve can be caused by:

Swelling of the surrounding soft tissues.
Severe localized inflammation.
Rare cases of anatomical variations, cysts, or masses pressing against the nerve.

6. Idiopathic Causes (Unknown Origins)

In some instances, no specific underlying cause can be identified.
These cases are often attributed to spontaneous, undetected neurological inflammation.

Symptoms of Long Thoracic Nerve Palsy

1. Winging of the Scapula (بروز لوح الكتف للخلف)

This is the most common and definitive symptom. It becomes particularly prominent during:

Pushing against a wall.
Lifting the arm forward.
Carrying heavy objects.

The shoulder blade appears to stick out or separate from the back, a clinical sign widely known as a "Winged Scapula".

2. Shoulder and Arm Weakness (ضعف حركة الكتف والذراع)

Patients often experience:

Difficulty raising the arm above head level.
Weakness when pushing or pulling objects.
Difficulty lifting weights or participating in sports.

3. Shoulder or Upper Back Pain (ألم في الكتف أو أعلى الظهر)

The pain is typically characterized by:

Aching around the shoulder blade.
Pain in the shoulder that may radiate up to the neck.
Worsening of pain with movement or exertion.

4. Rapid Arm Fatigue (التعب السريع في الذراع)

Even simple, everyday movements can lead to:

Quick exhaustion of the arm muscles.
A persistent sensation of heaviness in the arm.
Reduced ability to sustain any physical activity.

5. Clicking or Grating Sound (صوت طقطقة أو احتكاك)

Some patients may notice:

A popping or clicking sound in the shoulder joint.
A grating sensation (crepitus) during movement.

This occurs because the shoulder blade is unstable and no longer glides smoothly over the rib cage.

6. Altered Shoulder Appearance (تغير شكل الكتف)

Visually, the condition can cause:

Asymmetry between both shoulders.
One shoulder appearing lower or drooping.
Visible muscle wasting (atrophy) around the shoulder over time.

Diagnosis of Long Thoracic Nerve Palsy

1. Clinical Examination (الفحص السريري)

This is the first and most crucial step. The physician will physically evaluate the patient for:

The presence of scapular winging.
Weakness in the shoulder muscles.
Limitations in raising the arm.
Shoulder instability during movement.

The Wall-Push Test (اختبار دفع الحائط): The doctor will ask the patient to face a wall and push against it with flat hands. If the nerve is damaged, the shoulder blade will instantly protrude outward.

2. Electromyography and Nerve Conduction Studies - EMG (تخطيط الأعصاب والعضلات)

This specialized test is essential to:

Assess the electrical activity and efficiency of the long thoracic nerve.
Determine the severity of the nerve damage.
Identify whether the palsy is partial or complete.
Rule out other underlying neuromuscular disorders.

3. Imaging Studies: X-rays and MRI (الأشعة والرنين المغناطيسي)

The doctor may request an X-ray of the shoulder/neck or an MRI scan to:

Rule out bone fractures or joint dislocations.
Detect any structural compression on the nerve roots.
Exclude inflammation, cysts, or rare tumors.

4. Medical History Review (التاريخ المرضي)

The physician will gather comprehensive details regarding:

Any recent trauma, falls, or accidents.
Previous surgical procedures (especially chest or armpit surgeries).
Participation in strenuous sports or heavy lifting.
The exact timeline of when the symptoms started and how they progressed.

Medication Class	Examples	Benefits	Potential Side Effects
1. Non-Steroidal Anti-Inflammatory Drugs (NSAIDs)	Ibuprofen, Diclofenac, Naproxen	• Reduces shoulder pain • Decreases tissue inflammation • Improves daily functional mobility	• Gastric irritation / ulcers • Heartburn • Elevated blood pressure • Kidney strain (with long-term use)
2. Simple Analgesics	Paracetamol (Acetaminophen)	• Manages mild-to-moderate pain • Much safer on the stomach than NSAIDs	• Generally safe; liver toxicity only if maximum daily doses are exceeded
3. Neuropathic Pain Medications	Pregabalin, Gabapentin	• Targets nerve-specific pain (burning, tingling, electric sensations) • Improves sleep quality	• Drowsiness • Dizziness • Temporary cognitive blurriness / poor concentration
4. Muscle Relaxants	Baclofen, Tizanidine	• Relieves painful muscle spasms in the neck and shoulder girdle • Enhances overall comfort	• Drowsiness • Muscle weakness / lethargy
5. Corticosteroids	Localized injections or short-term oral courses	• Powerfully suppresses severe localized neurological inflammation	• Blood sugar spikes • Must never be used arbitrarily due to systemic risks

Surgical Treatment for Long Thoracic Nerve Palsy

(Types, Procedures, and Outcomes)

Surgical intervention for Long Thoracic Nerve Palsy is considered a secondary option, reserved for severe, chronic, or traumatic cases where conservative management (medications and physical therapy) has failed to provide clinical improvement within an appropriate timeframe. The choice of the surgical technique depends heavily on the cause of the injury, the duration of symptoms, and the degree of nerve and muscle damage.

When does a patient need surgery?

A physician will typically consider surgical intervention in the following scenarios:

Symptoms persist for more than 6 to 12 months without signs of recovery.
Severe muscle weakness that severely impairs daily arm and shoulder functions.
Persistent, highly visible, and debilitating winging of the scapula.
Failure of a structured physical therapy program to stabilize the shoulder.
Diagnostic proof (via EMG or imaging) of a completely severed or severely degenerated nerve.

Types of Surgical Procedures

1. Nerve Decompression (تحرير العصب)

The Concept: This is performed when the long thoracic nerve is structurally compressed or entrapped by surrounding scar tissue, inflammation, or anatomical structures. The goal is to release the pressure and allow the nerve to recover.
The Procedure: Performed under general anesthesia. A small incision is made near the axilla (armpit) or chest wall. The surgeon carefully isolates the long thoracic nerve and removes any constricting tissue or adhesions before closing the wound.
Advantages: It is the least invasive surgical option, highly suitable for early-stage compression, and offers a strong chance of progressive nerve recovery.
Recovery: Several weeks to months, closely coordinated with targeted physical therapy.

2. Nerve Repair or Grafting (إصلاح أو ترقيع العصب)

The Concept: Indicated when the nerve is physically severed, lacerated, or severely scarred due to direct trauma or surgical accidents.
The Procedure: The surgeon identifies the damaged segment. If the ends are close, they are cleanly reconnected (Direct Repair). If there is a large gap, a healthy segment of a nerve harvested from another part of the body (or a donor graft) is used to bridge the gap (Nerve Grafting).
Outcomes: Recovery is highly gradual, as nerve fibers must grow through the graft. Patients may achieve partial functional restoration, though some mild weakness or altered sensation may remain.

3. Nerve Transfer (نقل الأعصاب)

The Concept: When the long thoracic nerve is irreparably damaged, a small, redundant branch of a nearby healthy nerve is redirected and connected to the remaining healthy portion of the long thoracic nerve to reinnervate the serratus anterior muscle.
Advantages: Highly effective for severe, proximal nerve injuries, providing a fresh electrical source to revitalize the paralyzed muscle.

4. Muscle or Tendon Transfer (نقل العضلات أو الأوتار)

The Concept: This is the most common functional surgery for chronic cases where the nerve and muscle cannot recover. A healthy, working muscle nearby is repositioned to perform the duties of the paralyzed serratus anterior.
The Procedure: Usually, a portion of the pectoralis major muscle (the chest muscle) or its tendon is detached, elongated, and surgically anchored to the lower tip of the shoulder blade (scapula).
Advantages: Significantly reduces the cosmetic winging of the scapula and mechanically restores the ability to stabilize and raise the arm.
Disadvantages: Requires an extensive post-operative rehabilitation period, and may not fully replicate 100% of natural, original shoulder biomechanics.

5. Scapulothoracic Fusion / Arthrodesis (تثبيت لوح الكتف)

The Concept: Reserved as a last resort for extremely severe cases where all reconstructive and transfer options have completely failed.
The Procedure: The shoulder blade is physically fused directly to the rib cage using orthopedic plates, screws, or wires.
Disadvantages: This eliminates the winging by permanently restricting the natural sliding movement of the scapula. While it provides stability and relieves severe pain, it results in a permanent limitation of full shoulder mobility.

6. Endoscopic / Minimally Invasive Surgery

In advanced specialized centers, certain decompression techniques can be performed endoscopically. This offers the benefits of:

Smaller surgical incisions.
Reduced post-operative pain.
Faster initial wound healing (though actual nerve recovery time remains unchanged).

Recovery Timelines

1. Recovery Time Without Surgery (Conservative Care)

In mild to moderate cases undergoing physical therapy:

Initial clinical improvement is usually noticed within 2 to 6 months.
Full functional recovery can take anywhere from 6 months to 2 years.
Progress is slow because peripheral nerves heal and regenerate at a very gradual biological pace.

2. Recovery Time After Surgery

The timeline varies according to the specific procedure performed:

After Decompression: Light, guided movements begin within weeks; noticeable recovery occurs within 3 to 6 months; full recovery may take up to a year.
After Repair or Grafting: Nerve tissue regenerates at a rate of approximately 1 mm per day. Signs of muscle reinnervation may take several months to appear, with full recovery spanning 1 to 2 years.
After Muscle/Tendon Transfer: The arm is strictly immobilized in a sling for several weeks to allow the tendon to heal to the bone. Progressive physical therapy follows, with functional improvement stabilizing between 4 to 12 months.

Essential Rehabilitation Exercises

Rehabilitation must always be guided by a physical therapist. The following exercises are specifically designed to safely rebuild scapular stability:

1. The Wall Push-Up (تمرين دفع الحائط)

How to do it: Stand facing a wall at arm's length. Place your palms flat against the wall at shoulder height. Keeping your body straight, slowly bend your elbows to bring your chest closer to the wall, then firmly push back to the starting position.
Repetitions: 2 to 3 sets of 10 to 15 repetitions.

2. The Serratus Punch (تمرين دفع الكتف للأمام)

How to do it: Lie flat on your back on a firm surface. Extend your arm straight up toward the ceiling. Without bending your elbow, reach higher by lifting your shoulder blade off the floor (punching upward using your shoulder girdle). Lower your shoulder back to the floor.
Benefit: Directly isolates and strengthens the serratus anterior muscle.

3. Wall Slides (تمرين الانزلاق على الحائط)

How to do it: Stand facing a wall, resting your forearms flat against it. Slowly slide your forearms upward along the wall while focusing on keeping your shoulder blades flat and stable against your back. Slide back down smoothly.
Benefit: Enhances controlled overhead shoulder tracking.

4. Progressive Arm Raises

How to do it: Slowly raise your arm forward or out to the side. Start entirely without weights, focusing purely on perfect posture and scapular control, before gradually introducing very light resistance.

5. Elastic Resistance Band Exercises

Using a light therapy band anchored firmly:

Perform gentle rows (pulling backward).
External and internal shoulder rotations.
Benefit: Strengthens the rotator cuff and surrounding stabilizer muscles.

6. Targeted Stretching Exercises

Helps relieve secondary muscle tightness and spasms in the upper trapezius, neck, and chest muscles, thereby lowering chronic pain levels.

Critical Advice & Exercises to Avoid

???? Key Patient Tips:

Start slowly: Over-exerting a weak muscle will cause further strain.

Listen to your body: Immediately stop an exercise if it triggers sharp or increasing pain.

Consistency is king: Regular, low-intensity compliance yields far better nerve recovery outcomes than sporadic, aggressive workouts.

Expected Results: Changes typically become measurable within weeks to a few months depending on structural damage.

❌ Exercises to STRICTLY Avoid: During the recovery phase, avoid exercises that overload the shoulder girdle or compress the long thoracic nerve, including: