National League for Nursing (NLN PAX) Practice Exam

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What does an electroencephalogram allow a physician to examine?

The impulses of the specialized muscle cells of the heart
The impulses of the nerve cells within the brain
The pressure within the eye
The amount of air upon exhalation

The correct answer is: The impulses of the nerve cells within the brain

An electroencephalogram (EEG) is a diagnostic test specifically designed to measure and record the electrical activity of the brain. The test detects the tiny electrical charges that result from the activity of the brain’s nerve cells, known as neurons. This information is crucial for evaluating various neurological conditions, understanding brain function, diagnosing seizure disorders, and assessing brain injury, among other purposes. The option that refers to the impulses of the nerve cells within the brain directly aligns with the primary function of an EEG. While other options pertain to different types of physiological measurements (such as heart activity, intraocular pressure, or respiratory function), they do not represent the purpose of an EEG, which is solely focused on the brain’s electrical activity.