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What It Is:

EEG is a test that records the electrical activity of the brain using small electrodes placed on the scalp. It measures brain waves and helps assess brain function.

🩺 Common Uses:

• Diagnose epilepsy and seizures
• Detect sleep disorders
• Investigate causes of confusion, memory problems, or brain injury
• Monitor brain activity during surgery or coma

🧑‍⚕️ How It Works:

• Electrodes are attached to the scalp with a conductive gel.
• Brain waves are recorded as patterns on a computer.
• The test is painless and usually takes 20–40 minutes.

👂 ENG (Electronystagmography)

🔍 What It Is:

ENG is a test that evaluates balance and eye movements to help diagnose problems in the inner ear or vestibular system (which controls balance).

🩺 Common Uses:

• Investigate causes of dizziness, vertigo, or balance disorders
• Diagnose inner ear infections or vestibular dysfunction
• Assess how well the eyes track movement

🧑‍⚕️ How It Works:

• Small electrodes are placed around the eyes to record involuntary eye movements called nystagmus.
• The patient may be asked to follow moving objects or experience changes in position or temperature in the ears (caloric test).
• The test usually lasts 30–60 minutes.

📝 Summary Table