Neurology

Electroencephalogram (EEG)

The electroencephalogram (EEG) is a non-invasive test used to evaluate brain function or disorders, or to determine brain death.

An EEG may be done for the following reasons:

• To diagnose epilepsy.
• To diagnose brain injury.
• To assess conditions and diseases that affect the brain, such as coma, mental retardation, encephalitis, cognitive impairment, brain tumors, or certain psychological disorders.

For more information on Electroencephalogram (EEG) please visit our Health Information area.

Electromyography (EMG)

The measurement and recording of electrical activity generated in muscle in response to a nervous stimulation.

Electromyography (EMG) is often performed at the same time as nerve conduction studies, which aid in the diagnosis of peripheral nerve disorders.

An EMG is most often done for the following reasons:

• To diagnose the source of pain, cramping, or weakness in the muscles and nerves.
• To differentiate between true muscle weakness and limitations due to pain.
• To determine if muscles are working properly.
• To differentiate between muscular conditions and dysfunction due to nerve disorders.

For more information on Electroencephalogram (EEG) please visit our Health Information area.