2024 Workshop Handout Bundle-W45ATH~1

W45ATH~1

Pdf Summary

The document, "The Electrodiagnostic Assessment of Cervical Radiculopathies and Brachial Plexopathies" by Mark A. Ferrante, MD, provides a comprehensive review of the electrodiagnostic (EDX) examination used to assess peripheral nerve disorders, specifically cervical radiculopathies and brachial plexopathies. The EDX examination is divided into two main components: nerve conduction studies (NCS), which are further split into sensory and motor NCS, and needle electrode examination (NEE).<br /><br />EDX examinations assess the integrity of sensory and motor neurons, neuromuscular junctions, and muscle fibers. Sensory NCS are pivotal for lesion localization, while motor NCS gauge lesion severity and pathology (axon vs. myelin disruption). NEE refines lesion locations and characterizes chronicity and progression.<br /><br />EDX testing is crucial for identifying radiculopathies, which predominantly affect the C7 and C6 roots. These conditions often manifest as preganglionic nerve fiber involvement, rendering conventional sensory NCS results normal. However, motor NCS and NEE can identify axonal disruptions and neurogenic motor unit action potentials (MUAPs).<br /><br />The assessment of brachial plexopathies divides the brachial plexus into the supraclavicular, retroclavicular, and infraclavicular regions, examining nerve roots, trunks, divisions, cords, and terminal nerves. The examination integrates regional approaches, using sensory NCS results to guide further testing and confirm lesion localization.<br /><br />The document concludes that while EDX testing may miss some radiculopathies due to minimal motor axon disruptions or demyelinating pathologies, it remains a vital tool. It provides reliable lesion localization, characterizes chronic changes, and can influence management strategies.<br /><br />Overall, this detailed guide highlights the importance of accurate anatomical knowledge and systematic electrodiagnostic assessment in diagnosing and managing cervical radiculopathies and brachial plexopathies effectively.

Keywords

Electrodiagnostic

Cervical Radiculopathies

Brachial Plexopathies

Nerve Conduction Studies

ncs

Needle Electrode Examination

Sensory NCS

Motor NCS

Lesion Localization

Axonal Disruptions

Neurogenic MUAPs

nerve conduction studies

nerve conduction study

ncs