BUCKS MERCER NEUROLOGY​

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Frequently Ordered Tests

EEG (Electroencephalogram)
An EEG is a test to detect abnormalities in the electrical activity of the brain. A technician applies between 16-25 flat metal discs (electrodes) to different positions on your scalp. This test causes no discomfort. Although having electrodes pasted onto your skin may feel strange, they only record activity and do not produce sensation. This test is used to help diagnose the presence and type of seizure disorder, to look for causes of confusion, and to evaluate head injuries, tumors, infections, degenerative diseases and metabolic disturbances that affect the brain. This test will usually take 1 hour to perform.

How to prepare for an EEG
You must have clean hair.   Do not use hair spray or perfume. Do not wear jewlery.   If a sleep-deprived EEG is ordered, you will be given instructions on how much sleep is allowed to achieve the best test results.


EMG (Electromyography) and Nerve Conduction Studies
Records electrical activity from the brain and/or spinal cord to a peripheral nerve root (found in the arms and legs) that controls muscles during contraction and rest.  During an EMG, very fine wire electrodes are inserted into a muscle to assess changes in electrical voltage that occur during movement and when the muscle is at rest.  The electrodes are attached through a series of wires to a recording instrument.  Testing lasts about an hour but may take longer, depending on the number of muscles and nerves to be tested.  Most patients find this test to be somewhat uncomfortable.