Electroencephalography (EEG)

EEG studies are performed by trained technologists using standardized electrode placement systems and are interpreted by qualified physicians with expertise in clinical neurophysiology.

Clinical Indications

EEG is commonly used in the assessment of:

• Seizure disorders and epilepsy
• Episodes of altered consciousness or unexplained loss of awareness
• Suspected encephalopathy or metabolic/toxic brain dysfunction
• Syncope versus seizure differentiation
• Cognitive or behavioral changes of unclear etiology
• Monitoring cerebral function in critically ill patients (where applicable)

Types of EEG Studies

Available EEG investigations may include:

• Routine EEG
• Sleep-deprived EEG
• Prolonged or ambulatory EEG (where available)
• EEG with activation procedures such as hyperventilation and photic stimulation

Procedure Overview

During an EEG, surface electrodes are applied to the scalp using a conductive medium. The test is painless and typically lasts 20–60 minutes, depending on the study type. Patients are monitored throughout the procedure to ensure comfort and data quality.

Reporting and Interpretation

EEG recordings are analyzed for abnormalities in background activity, focal or generalized slowing, epileptiform discharges, and other clinically relevant patterns. Results are interpreted in the context of the patient’s clinical presentation and communicated to the referring provider in a timely manner.