EMG & Nerve Conductions | Electronic EMG Manual : Lower Extremity Nerves

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ELECTRONIC EMG MANUAL®

OVERVIEW

The EMG Manual is a simple step-by-step approach to the basic understanding of EMG and Nerve Conductions studies. It is designed to familiarize the reader with the basic aspects of nerve conduction studies and needle examinations and can serve as a guide to the test, a preparation for the EMG rotation, or as a simple means for better understanding of the indications, preparations, interpretation and performance of EMG Nerve and Conduction studies

NERVE CONDUCTION STUDIES | LOWER EXTREMITY NERVES | THE FEMORAL AND SCIATIC NERVES

Femoral Nerve

Place the active recording electrode over the vastus medialis muscle and the reference electrode on the patella.

Stimulate the nerve in the groin over the femoral triangle or at Hunter's canal. You can also stimulate it above the inguinal ligament.

Because this nerve is difficult to stimulate in obese patients, especially above the inguinal ligament, needle electrodes may be used for that purpose.

Femoral Entrapment, Compression or Injury Sites

The posterior tibial nerve may be involved as part of a sciatic nerve injury; at the popliteal fossa; in the tarsal tunnel following ankle injury; and rarely at an anterior opening of the abductor hallucis muscle.

Sciatic Nerve

Place the recording electrodes on those muscles used in peroneal or posterior tibial testing. The stimulating electrode must be a needle electrode over the sciatic notch, which is halfway between the ischial tuberosity and greater trochanter.

Sciatic Entrapment, Compression or Injury Sites

The sciatic nerve may be injured high along its course at the roots and plexus level; underneath the pyriformis muscle; in the buttock (most notoriously by injury from intramuscular injections); and along its entire course in the thigh by fracture, missile wounds orother types of injuries.

	GUIDES & INFORMATION
		Electronic EMG Manual®
		Peripheral Nerves Anatomy
		General Muscles Anatomy
		Nerve Conduction Set-Ups
		Needle EMG Anatomy Atlas
		Patient Education Series (FAQ)
		Nerve Entrapment Guide

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This page was last updated on Sunday, March 04, 2012