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Erb's palsy
diagnosis process

Diagnosis starts in the delivery room and unfolds across the first weeks of life. Physical exam, imaging, and nerve conduction studies together build the picture — and the sooner that picture comes into focus, the better the outcomes.

Medically reviewed
Updated May 2026
~ min read
Hours, not days
Initial exam typically happens in the first hours of life
Multi-step
Physical exam, imaging, and nerve studies in combination
Specialist-led
Pediatric neurologists guide the workup and findings

The Erb’s palsy diagnosis process is a critical journey for families and healthcare professionals. The condition arises from a brachial plexus injury, which can significantly impact a newborn’s arm function. Timely, accurate diagnosis ensures the right treatment and support. The process combines physical examination, clinical evaluation, and medical tests — aiming for both early intervention and long-term planning.

This page walks through assessment steps, the role of pediatric neurology, clinical evaluation, and medical tests used to confirm Erb’s palsy. For the broader picture, see Erb’s palsy overview.

Erb's palsy assessment steps

Assessment begins right in the delivery room or shortly after birth — especially when birth-related nerve injury is suspected. Early detection allows immediate intervention and improves prognosis.

Initial physical examination for newborns

Understanding birth-related nerve injury

Diagnosing Erb's palsy in infants

Diagnosis combines clinical evaluation with specific medical tests — identifying the extent of nerve damage and associated muscle weakness. A multidisciplinary team, including pediatric neurologists, is central to the process.

Pediatric specialist examining a newborn's arm during an Erb's palsy diagnostic evaluation

What the workup includes

The diagnostic toolkit typically combines:

  • Detailed physical exam by a pediatric neurologist
  • Birth history and obstetric review
  • Imaging (MRI, ultrasound, X-ray as appropriate)
  • Nerve conduction studies and EMG
  • Repeat assessments at 1, 3, and 6 months

Role of pediatric neurology in diagnosis

Evaluating newborn muscle weakness

Clinical evaluation for Erb's palsy

A thorough clinical evaluation investigates potential symptoms and the timeline of nerve injury. Pediatric neurology expertise combined with knowledge of obstetric complications during delivery forms the backbone of this assessment.

Importance of nerve conduction studies

Assessing nerve damage in infants

Medical tests for Erb's palsy

Medical tests confirm the presence of nerve injuries and define their scope. Physical examinations combined with advanced nerve damage assessment techniques ensure the diagnosis is accurate and comprehensive.

Diagnostic criteria and procedures

Timeline for Erb's palsy diagnosis

When the diagnosis points to medical negligence

If excessive force or improper delivery technique contributed to your child’s Erb’s palsy, a legal claim can recover the cost of therapy, surgery, and lifetime care. Specialized birth injury lawyers can review your case at no cost.

Frequently asked questions about Erb's palsy diagnosis

Erb’s palsy is weakness or paralysis of the arm due to injury to the brachial plexus nerves — typically occurring during birth. It affects movement and sensation in the shoulder, arm, and hand.

Through a combination of physical examination and medical history review. Doctors may also use imaging tests like MRI, ultrasound, or X-rays to assess the extent of nerve damage.

Often from shoulder dystocia during childbirth — the baby’s shoulder gets stuck behind the mother’s pelvic bone, stretching or tearing the nerves. See Erb’s palsy risk factors.

As soon as symptoms such as lack of movement or weakness in the arm are noticed. Early diagnosis leads to more effective treatments and better outcomes.

Costs vary by provider and tests like imaging. Check with your insurance about coverage for diagnostic procedures.

Early diagnosis allows timely intervention — significantly improving the chances of recovery. Early physical therapy strengthens muscles and improves arm function.

Though rare, misdiagnosis can occur, especially with mild symptoms. A thorough examination by a specialist and appropriate imaging tests help ensure accuracy.