At Neurodiagnostic Center, led by Dr. Ignacio Carrillo-Nunez, we offer Electromyography (EMG) to evaluate the health of muscles and the nerves that control them. Our advanced diagnostic technology and compassionate care ensure accurate results and a comfortable experience for all our patients.
Electromyography (EMG) is a diagnostic procedure that assesses the electrical activity of muscles at rest and during movement. During the test, a small needle electrode is inserted into the muscle to record the electrical signals produced by the muscle fibers. The results help detect neuromuscular disorders, muscle dysfunction, or nerve abnormalities.
Persistent muscle weakness or fatigue
Numbness, tingling, or burning sensations in the arms, legs, hands, or feet
Difficulty with grip strength or fine motor skills
Unexplained muscle pain or cramping
Twitching or involuntary muscle movements
Trouble walking, balancing, or coordinating movements
Needle Electrode Insertion: A thin, sterile needle electrode is inserted into the muscle to record electrical activity.
Resting Activity Measurement: The muscle’s activity is recorded while at rest to detect abnormal spontaneous electrical signals.
Muscle Contraction Assessment: You will be asked to gently contract the muscle to measure its response to nerve signals.
Data Interpretation: Dr. Carrillo-Nunez analyzes the recorded signals to determine if there are any signs of nerve or muscle dysfunction.
Preparation: No special preparation is required, but it’s best to wear loose, comfortable clothing.
Needle Insertion: A small, sterile needle electrode will be inserted into the targeted muscle. You may feel a mild discomfort, similar to a pinprick.
Muscle Contraction: You will be asked to contract and relax your muscles during the test. This helps assess how well the muscles and nerves are functioning.
Duration: The procedure typically takes 30-60 minutes, depending on the number of muscles being tested.
Post-Procedure: Some mild soreness may occur after the test, but this usually subsides within a few hours.
Carpal Tunnel Syndrome: Compression of the median nerve causing pain, numbness, and weakness in the hand.
Peripheral Neuropathy: Nerve damage often caused by diabetes, infections, or other systemic conditions.
Radiculopathy: Nerve root compression, often associated with spinal conditions such as herniated discs.
Amyotrophic Lateral Sclerosis (ALS): A progressive neurodegenerative disease affecting nerve cells in the brain and spinal cord.
Myopathy: Muscle disorders resulting from inflammation or inherited conditions.
Guillain-Barré Syndrome: A condition where the immune system attacks the peripheral nerves.
Q: Is an EMG painful?
A: You may feel a mild pinprick sensation when the needle electrode is inserted, followed by slight discomfort when the muscle contracts. However, most patients tolerate the procedure well.
Q: How long does it take to get results?
A: Results are typically available within 1-2 days after Dr. Carrillo-Nunez reviews and interprets the data.
Q: Do I need to stop taking my medications before an EMG?
A: Inform the doctor about any medications you are taking, especially blood thinners, as they may affect the procedure.
Q: Can I resume normal activities after the test?
A: Yes, you can resume normal activities immediately, although you may experience mild soreness in the tested muscles.
Q: Is an EMG performed alone or with other tests?
A: EMG is often performed alongside a Nerve Conduction Study (NCS) to provide a complete assessment of nerve and muscle function.
