2021 Workshop Handout Bundle-Needle EMG Basics- Patel

Needle EMG Basics- Patel

Pdf Summary

This document provides an overview of the basics of needle electromyography (EMG) and its role in electrodiagnostic (EDX) evaluations. The needle examination helps differentiate various conditions and complements the information obtained from nerve conduction studies and clinical presentation. The author emphasizes the importance of a thorough history and physical examination in guiding the EDX evaluation and designing the study.<br /><br />The reasons for performing a needle examination include assessing motor function directly, distinguishing between muscle diseases, neuromuscular disorders, and neurogenic conditions, and determining the chronicity of a neuropathic process. The examination can also quantify the extent of axonal involvement or injury. Approaching the EDX evaluation involves considering the referral source, performing a focused history and peripheral neuromuscular examination, and narrowing down the differential diagnosis.<br /><br />The document also covers the basics of the needle examination, including the equipment needed, the type of needle used, and safety precautions such as wearing gloves and using alcohol. It discusses the physiology behind the examination, including the definition of a motor unit, innovation ratio, and motor nerve conduction studies. These elements help differentiate between primary muscle diseases, neuromuscular junction disorders, and neurogenic processes.<br /><br />This monograph serves as a background resource for a hands-on workshop session and was originally prepared in 1985 by Dr. Richard Ball. It was later revised in 1998. The ideas and opinions presented in the document are those of the author and do not necessarily represent the views of the American Association of Neuromuscular & Electrodiagnostic Medicine (AANEM).

Keywords

needle electromyography

electrodiagnostic evaluations

nerve conduction studies

clinical presentation

motor function

muscle diseases

neuromuscular disorders

neurogenic conditions

chronicity of neuropathic process

axonal involvement

ncs