Neuro(b)log for Patients

Have you received a referral for an electromyography (EMG) exam from your doctor, and the first thing you did was search online discussion forums? If so, you have likely come across terrifying stories of "unbearable pain" and medieval torture practices in the neurologist's office. As a neurologist who performs this examination, I want to show you the pure medical reality. Modern electrophysiology in neurology is a far cry from these internet rumors. An EMG is not a tool for torture, but a fascinating and extremely precise diagnostic method. Let's clear things up—pragmatically, scientifically, and without fear. 

A Supplementary Functional Exam: We Measure Condition, Not Determine the Entire Diagnosis

One of the most common misconceptions is the idea that an EMG on its own provides a one-hundred percent, definitive diagnosis. In reality, it is a supplementary functional examination. While magnetic resonance imaging (MRI) or CT scans show a static structural (anatomical) image, an EMG measures dynamic function—meaning how your nerves and muscles are actually functioning at that precise moment. For a neurologist, EMG results are a crucial piece of the puzzle, interpreted within the context of your medical history, clinical examination, and laboratory results.

Timely functional testing helps precisely localize issues across a wide spectrum of conditions: 

• Entrapment syndromes: Most commonly, this involves carpal tunnel syndrome (CTS, compression of the median nerve in the wrist) or compression of the ulnar nerve (nervus ulnaris) in the elbow area. 
• Root syndromes (radiculopathy): Damage or compression of a nerve root directly in the spine, most frequently due to a herniated disc in the lumbar or cervical region. 
• Post-traumatic conditions: Plays a vital role following car accidents, sports injuries, fractures, or severe dislocations. An EMG can precisely determine whether fixation, dislocation, or mechanical impact caused paresis (paralysis), interruption, or tearing of peripheral nerve plexuses, and tracks the success of subsequent regeneration. 
• Polyneuropathy: A systemic disorder of peripheral nerves, manifesting as symmetrical tingling, burning, or loss of sensation traveling up from the soles of the feet (e.g., in diabetes). 
• Neuromuscular transmission disorders and muscle diseases: Conditions such as myasthenia gravis (a breakdown in communication between nerve and muscle) or primary myopathies (disorders of the muscle fibers)

The Exam Consists of Two Parts (Not Always Performed Together)

Patients often confuse conduction studies and needle EMGs, assuming they must undergo both at the same time. In reality, they are two separate methods. Whether you undergo only one part or both is decided by the physician based on your specific indication. 

For instance, in mild and clear cases of carpal tunnel syndrome, a conduction study alone is often fully sufficient. 

Part 1: Nerve Conduction Studies (NCS) 

This part measures the speed and quality of signal transmission along your nerve pathways. 

• How it works: We apply surface electrodes to your skin. Before the measurement begins, the patient is always safely grounded using a special grounding electrode. This filters out unwanted electrical noise from the surroundings and ensures absolute safety. Using a small stimulator probe, we then send a mild, precisely calibrated electrical impulse into the nerve. 
• What it feels like: Patients most often describe this feeling as a quick twitch in the muscle, tingling, or like static electricity when you touch a car door handle in winter. It lasts a fraction of a second and is completely safe. 

Part 2: Needle Electromyography (The EMG itself) 

This part examines the health of the muscles themselves and how well they receive instructions from the nervous system. 

• How it works: An extremely thin, disposable needle electrode is inserted into the selected muscle. You then keep the muscle completely relaxed, or, conversely, slightly contract it upon my instruction. 
• What it feels like: The needle prick is comparable to a routine vaccination or acupuncture. We use the thinnest needles available on the market, so you feel a mild pressure rather than a sharp pain. The needle acts purely as a passive microphone—it does not emit any electrical current into your body; it only records the electrical sounds of your muscle. 

Contraindications and Technical Obstacles: When Can the Exam Not Be Performed?

Electromyography is very safe, yet clear medical limits (contraindications) and anatomical obstacles exist that can prevent or significantly complicate the examination: 

• For Nerve Conduction Studies (electrical stimulation):
  • Pacemaker / Implantable Cardioverter-Defibrillator (ICD): Electrical stimulation near these devices (especially on the left upper limb) is strictly contraindicated in Neurology Mištríková, as it could disrupt their proper function.
  • Swelling (Edemas): Severe swelling of the examined limb significantly complicates or entirely prevents conduction study testing. Fluid in the subcutaneous tissue acts as an electrical insulator—it increases the distance between the nerve and the surface electrode, which dampens the recorded signal and distorts measurement results.
  • Acute skin infections and burns: There must be no open wounds or infectious inflammation in the areas where the electrodes are placed. 
• For Needle EMG:
• Severe blood clotting disorders (hypocoagulation): If a patient suffers from severe bleeding tendencies, inserting a needle into the muscle poses a risk of deep bleeding. 

Practical Rules: How to Prepare and What to Do After the Exam?

You do not need to fast or stop taking your routine medication; just follow a few practical guidelines: 

Before the examination:

• Dress comfortably: Wear loose clothing on the day of your appointment. For upper limb measurements, we need to easily roll up sleeves past the elbow; for lower limbs, trousers need to roll up above the knee (loose trousers or a skirt are ideal). This saves you unnecessary changing.
• No creams or oils: Do not apply any body lotions, creams, or oils to your body (especially your hands and feet) on the day of the exam. A greasy film on the skin significantly impairs signal transmission and hinders correct electrode recording.
• Limb temperature is key: The temperature of the examined limb must be sufficient; it cannot be too cold. Cold hands or feet naturally conduct electrical impulses more slowly, which artificially and falsely distorts measurement results (the device could show a pathological slowdown where the nerve is perfectly healthy). In the winter months, please arrive at the waiting room 10 to 15 minutes early so your skin has time to warm up to room temperature. In some cases, the nurse may soak your hands in warm water to warm them up.
• Report blood thinners in advance: If you take medications affecting blood clotting (especially stronger anticoagulants such as Warfarin, Pradaxa, Xarelto, Eliquis, etc.), please inform us as soon as you arrive at the clinic, before starting the needle portion of the exam.
• Tendency to faint during injections: If you are afraid of needles, feel faint at the sight of blood, or have a tendency to pass out (collapse) during routine medical procedures, tell us in advance. We will adjust your position on the bed and ensure that you get through everything in absolute safety and peace. 

After the examination:

• Avoid unnecessary strain on the limb: Immediately following a needle EMG, we recommend not physically overexerting the examined arm or leg for the rest of the day. Avoid heavy gym workouts, carrying heavy groceries, or prolonged manual labor. Muscle fibers need a little time to recover.
• Expect a potential minor bruise: After the needle is inserted, a small bruise (hematoma) or mild muscle soreness may naturally appear at the puncture site, similar to a standard blood draw or vaccination. This is a completely normal reaction that will fade away on its own within a few days without leaving a trace. 

Conclusion: 

Results Immediately and Without Long Waiting Times

A massive advantage of private care at Neurologie Mištríková is receiving complete results along with a detailed explanation without long waiting times. You don't have to wait weeks in anxiety—not only for an appointment slot, but also to find out what the machines revealed. If you have a referral for an EMG or are troubled by long-term tingling in your limbs, book an appointment with us. The entire process is guided by myself and an experienced nurse with the utmost sensitivity, technological precision, and regard for your absolute comfort. 

MUDr. Petra Mištríková, MBA

FAQ

Do you have a referral for an EMG exam?
Book your appointment by emailing us at neurologie@neurologiemistrikova.cz.

Please include the following in your email:

• A photo or scan of your referral from your GP or neurologist (specifying the required scope of the exam).

• Your contact details for quick confirmation of your appointment.

• Don't have a referral? No problem. Email us, and we will arrange the scope and type of examination 

The cost of the examination depends on the specific method used (conduction study / needle EMG) and the scope recommended by your doctor.