Neurodiagnostic Center

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Neurological symptoms can be challenging to interpret and hard to replicate in a physician's office. At Middlesex Health, our specialized neurodiagnostic lab is equipped with advanced technology that allows us to study your nervous system's electrical activity and interpret your neurological symptoms. 

We use results from these tests to provide insight into a patient's condition and to assist our Neurologists in developing an individualized treatment plan for each patient.

EEG Tests

The main test performed at our neurodiagnostic center is the electroencephalography (EEG). During this test, dozens of tiny metal disks connected to a computer record your brain waves. Changes in your brain waves can help doctors diagnose neurological problems related to epilepsystrokebrain injury and more.

  • Confusion
  • Dizziness
  • Acute Aphasia 
  • Syncopal episodes
  • New onset Seizures
  • Abnormal movement while awake or asleep
  • Headaches with focal sensory or motor change deficits
  • Dementia with worsening cognitive or behavioral symptoms

  • Please avoid consuming any food or drinks containing caffeine for 8 hours prior to having a routine EEG.
  • Wash your hair the night before or the day of the test, but don't use any Hair Products. Hair products can make it harder for the sticky patches that hold the electrodes to adhere to your scalp.
  • If you're supposed to sleep during your EEG, your health care provider might ask you to sleep less or avoid sleep the night before your EEG.

You'll feel little or no discomfort during an EEG. The electrodes don't transmit any sensations. They just record your brain waves.

Here are some things you can expect to happen during an EEG:

  • A technician measures your head and marks your scalp with a special pencil or marker to indicate where to attach the electrodes. These spots on your scalp will be scrubbed with a gritty cream to improve the quality of the recording.
  • A technician attaches discs (electrodes) to your scalp using a special conductive paste.. The electrodes are connected with wires to an instrument that amplifies the brain waves and records them on computer equipment. Once the electrodes are in place, an EEG typically takes between 25 and 40 minutes. Testing for certain conditions requires you to sleep during the test. In that case, the test can be longer.
  • You relax in a comfortable position with your eyes closed during the test. At various times, the technician might ask you to open and close your eyes, perform a few simple calculations , read a paragraph, look at a picture, breathe deeply for a few minutes, or look at a flashing light.
  • Video is routinely recorded during the EEG. Your body motions are captured by a video camera while the EEG records your brain waves. This combined recording can help your doctor diagnose and treat your condition.

Nerve Conduction Studies & Electromyography (EMG)

A Nerve Conduction Study (NCS) is a diagnostic test that evaluates the function of your peripheral nerves. An NCS can help detect the presence and extent of peripheral nerve damage. Your peripheral nerves are the nerves that lie outside of your central nervous system. Your peripheral nerves consist of your motor nerves, which control your muscles, and sensory nerves, which carry signals to your brain about the things you touch, taste, smell, and see. Your healthcare provider may recommend an NCS if you have symptoms such as tingling or numbness. 
At Middlesex Health, we often perform an EMG (electromyography) test and a nerve conduction study in the same appointment, but they’re different tests. An EMG measures how much electrical activity a muscle contraction produces. An NCS assesses the flow of electrical current through a peripheral nerve before it reaches a muscle. It can also detect the flow of electricity through sensory nerves.

Nerve conduction studies help diagnose issues with your peripheral nerves — mainly peripheral neuropathy and nerve compression syndromes. They can help healthcare providers determine the cause, severity, and prognosis of these conditions.

Nerves are like cables that carry electrical impulses or signals between your brain and the rest of your body. These impulses help you feel sensations and move your muscles. A nerve conduction study works by testing the transmission of these signals, especially the speed at which they travel and their “strength.”
The study involves wires (electrodes) taped to your skin in specific places along a nerve pathway. A provider stimulates the nerve with a mild electrical shock. As the electrical current travels down the nerve, the electrodes record the current and how fast it’s traveling. 
In healthy nerves, electrical signals can travel up to 120 miles per hour. If your nerve is damaged, the current will be slower and weaker. By stimulating the nerve at various places, the provider can determine the specific site of the nerve injury or issue.

Before you have a nerve conduction study, you should:

  • Bathe or shower and wear comfortable, loose-fitting clothing.
  • Avoid putting on any skin products or perfume.
  • Tell the provider performing the study if you have a pacemaker or any other electrical medical device.

Nerve conduction studies are generally safe. Although the electrical stimulation may startle you initially, it shouldn’t be painful. The shock feels similar to a shock you experience from static electricity, or it may feel like a mild tingling. Most people can complete the test without issues.

Your Care Team

Marina Zaretskaya-Fuchs, MD

Marina Zaretskaya-Fuchs, MD


  • Middletown, CT


1 Specialty Care Location

1Middlesex Health Neurodiagnostic Center

534 Saybrook Rd
Middletown, CT 06457
Office Hours
7:00 AM - 3:30 PM
7:00 AM - 3:30 PM
7:00 AM - 3:30 PM
7:00 AM - 3:30 PM
7:00 AM - 3:30 PM
Middlesex Health Neurodiagnostic Center