Cervical Nerve Roots and Scapular Innervation

Introduction to Scapular Innervation

• The scapula is primarily innervated by cervical nerve roots C5 and C6, with variable contributions from C4, C7, and C8 depending on the specific scapular muscle, as noted by the American College of Radiology 1

Diagnostic Approaches for Scapular Function

• MRI of the brachial plexus is the preferred imaging modality for evaluating suspected plexopathies affecting scapular function, according to the American College of Radiology 1, 3
• Electrodiagnostic studies help confirm clinical diagnosis of plexopathy affecting scapular muscles, as recommended by the American College of Radiology 1

Clinical Considerations for Scapular Weakness

• Understanding the segmental innervation is crucial for accurate diagnosis and management of cervical radiculopathies affecting scapular function, as emphasized by the American College of Radiology 1, 2
• When evaluating scapular weakness, it's essential to differentiate between preganglionic (nerve root) and postganglionic (plexus) injuries as treatment approaches differ, according to the American College of Radiology 4, 5