What is the primary function of the electrodes used in EEG recordings?

The primary function of the electrodes used in EEG recordings is to detect electrical activity from the brain. Electrodes are strategically placed on the scalp to pick up the tiny electrical impulses generated by neuronal activity. These impulses are then converted into electrical signals that can be recorded and analyzed, allowing for the observation of various brain states, such as sleep patterns, seizures, and cognitive responses.

The design and placement of the electrodes are critical because they need to capture the electrical signals from different regions of the brain. By analyzing these signals, healthcare professionals can gather important insights regarding neurological function and diagnosis.

Other options do not reflect the purpose of EEG electrodes. For instance, amplifying sound waves pertains to audiology and sound technology, measuring blood pressure is related to cardiovascular assessments, and stimulating muscle contractions ties into neuromuscular studies rather than monitoring brain activity. Each of these functions serves a distinct area in medical diagnostics and treatment but does not align with the core purpose of EEG electrodes.