Needle Electromyography

Concentric needle EMG was introduced in 1929 by Adrian and Bronk1 and is the traditional method of assessing EMG. The needle, which resembles a hypodermic needle, is inserted into the external anal sphincter while the patient is placed in the left lateral decubitus position. The needle can be advanced either into the EAS or deeper into the puborectalis muscle under the guidance of a finger inserted into the anal canal.

The uptake area of the electrode is quite small and includes only a few motor units; therefore, it is important to measure the activity in various locations in the muscle. The electrical activity is usually monitored during rest, squeezing, and simulated evacuation (pushing).

Figure 11.1. Normal surface elec-tromyogram (EMG). The resting activity is normal and the activity is increased at STFiAiNiNi coughing and squeezing, but not at straining.

Was this article helpful?

0 0
Constipation Prescription

Constipation Prescription

Did you ever think feeling angry and irritable could be a symptom of constipation? A horrible fullness and pressing sharp pains against the bladders can’t help but affect your mood. Sometimes you just want everyone to leave you alone and sleep to escape the pain. It is virtually impossible to be constipated and keep a sunny disposition. Follow the steps in this guide to alleviate constipation and lead a happier healthy life.

Get My Free Ebook


Post a comment