Electromyography (EMG) is a diagnostic test used to evaluate the health of muscles and the nerves that control them. It measures electrical activity in muscles and can help identify problems with nerves, muscles, or communication between the two.
Your healthcare provider may recommend an EMG if you experience symptoms that could indicate a nerve or muscle condition.
When is an EMG needed?
An EMG may be recommended if you experience symptoms such as:
- Tingling or numbness
- Muscle weakness
- Muscle pain or cramping
- Certain types of arm or leg pain
What can an EMG help diagnose?
EMG testing can help diagnose or rule out several types of nerve and muscle disorders, including:
- Muscle disorders: Such as muscular dystrophy or polymyositis
- Nerve-to-muscle communication disorders: Such as myasthenia gravis
- Peripheral nerve disorders: Such as carpal tunnel syndrome or peripheral neuropathy
- Motor neuron disorders: Such as amyotrophic lateral sclerosis (ALS) or polio
- Nerve root disorders: Such as those associated with a herniated spinal disk
How does an EMG work?
Motor neurons send electrical signals that cause muscles to contract. During an EMG, small electrodes detect electrical activity in the muscles. The signals are translated into graphs, sounds, or numerical measurements that a specialist interprets to evaluate muscle and nerve function.
Todd Troll, MD
The Iowa Clinic
Phone #: (641) 774-3245
Appointments in Specialty Clinic
Meet Your Provider
Dr. Todd Troll specializes in Physical Medicine and Rehabilitation, with expertise in electrodiagnostic medicine. He is board-certified by the American Board of Physical Medicine and Rehabilitation and provides diagnostic testing to evaluate nerve and muscle function.
Dr. Troll earned his medical degree from Indiana University School of Medicine and completed his residency at the Medical College of Ohio in Toledo, Ohio. Through his work with The Iowa Clinic, he helps patients identify the causes of symptoms such as numbness, tingling, muscle weakness, and pain.
Appointments & Insurance
Dr. Troll provides electromyography (EMG) services at LCHC’s Specialty Clinic.
For appointment information or scheduling, contact our Specialty Clinic at (641) 774-3245.
Insurance coverage and referral requirements may vary. Please contact your insurance provider to confirm coverage for EMG testing and whether a referral or prior authorization is required.