Registered Sleep Technologist Practice Exam 2025 – Complete Prep Guide

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What is the recommended impedance level for EEG electrodes?

Less than 5k ohms

The recommended impedance level for EEG electrodes is indeed less than 5k ohms. Maintaining a low impedance is critical for obtaining reliable and accurate readings in electroencephalography (EEG). If the impedance is too high, it can lead to poor signal quality, increased noise, and artifacts that may interfere with the interpretation of the brain's electrical activity.

Generally, an impedance level of less than 5k ohms is considered adequate for clinical and research purposes, as it strikes a balance between achieving good signal quality while ensuring that the electrodes maintain appropriate contact with the scalp. Operational protocols often suggest aiming for even lower levels, typically below 1k ohms, for optimal performance, but a threshold of 5k ohms is universally accepted as the upper limit for proper electrode function in most situations.

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Less than 10k ohms

Less than 3k ohms

Less than 1k ohms

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