Electroneuromiography: A Comprehensive Neurological Test

Electroneuromyography ‌allows⁤ for teh⁣ evaluation of peripheral nerves and/or muscle⁢ activity, representing a neurophysiological inquiry⁢ complementary to the clinical examination. Testing includes two parts: nerve conduction study and electromyography.

Electroneuromyography is performed by a neurologist and can be ‌performed on an outpatient basis or as part of hospitalization.The examination can vary depending on ‍the condition being investigated, ‍with an average duration of 20-60 minutes.

Nerve‍ Conduction Study is performed using a surface (bipolar) electrical stimulator by recording the nerve response after applying a low-intensity electrical stimulus (between 1-100⁣ mA) along the path‍ of the nerve being examined, multiple times and in multiple anatomical‌ areas. The conduction‍ study uses​ 2 electrodes, one active, which is applied to the⁣ muscle, and⁢ one reference, which is placed in⁤ a neutral location. this provides information ‌about both the nerve (motor ​and sensory fibers) and the muscle. Amplitude, velocity, and distal latency of the nerve are analyzed. Applying electrical current‍ may cause transient local discomfort. The presence of a pacemaker ⁣or mechanical valve does not constitute a contraindication to this technique.

Electromyography involves recording electrical activity in the muscle, activity generated spontaneously and consecutively with ‌muscle contraction. For these investigations, surface electrodes (small discs that adhere to ‌the skin) or needle electrodes (special, very fine, minimally invasive ⁢needles) can be‌ used.