department of neurology als center  
  Telephone: 212-305-1319 || Email:  
  als and neuromuscular disorders  


» back to ALS Evaluation

Laboratory Evaluation Magnetic Resonance Spectroscopy
Electromyography Transcranial Magnetic Stimulation
Lumbar Puncture Motor Unit Number Estimate
Magnetic Resonance Imaging Muscle and Nerve Biopsy
Quantitative Muscle Testing


Electromyography (EMG) evaluates the neurophysiological function of the peripheral motor and sensory nervous system and skeletal muscles. In other words, the EMG test determines if weakness in the muscles is caused by dysfunction of the muscles or the nerves controlling muscles and is one of most useful laboratory tests when evaluating patients who have neuromuscular diseases. The needle electrode EMG can determine if the disease is originating in the nerve or muscle, the distribution and the duration of the disease. Nerve Conduction Velocity studies (NCV) are able to evaluate the functional integrity of motor and sensory nerves. This test is done at the same time as the EMG and can determine if the disease is primarily in the nerve fibers themselves or the myelin sheath (coating on the nerve) causing slowed electrical conduction.

The EMG Laboratory at Columbia Presbyterian is directed by Louis H. Weimer, MD.
Center For Neuromuscular Diseases -

Copyright © 2008 The Eleanor and Lou Gehrig MDA/ALS Multidisciplinary Care Center | Department of Neurology | Columbia University Medical Center |
About Us | History of the Center | ALS Evaluation | ALS Multidisciplinary Clinic | Research | Patient Education | Events |
Profiles in Courage | Equipment Donation | Clinical Staff Members | Making an Appointment | Partnership Program | MDA | Resources | Contact Us | Sitemap |

Last updated: February 6, 2014 | Comments
ALS Center Neurology, Columbia University CUMC