What is the LFF, HFF, sensitivity, and sampling rate for the channel F4-M1?

In sleep studies, each EEG channel has specific parameters that are essential for accurate interpretation of the data. The Low Frequency Filter (LFF), High Frequency Filter (HFF), sensitivity, and sampling rate are all critical components that determine how the electrical signals from the brain are recorded and processed.

For channel F4-M1, the correct values are a LFF of 0.3 Hz, an HFF of 35 Hz, a sensitivity of 7 µV/mm, and a sampling rate of 500 Hz. This configuration is optimal for capturing the relevant frequencies present in sleep-related brain activity, especially the slower waves (like those found in NREM sleep) up to the beta range without introducing unnecessary noise from high-frequency signals.

The LFF of 0.3 Hz ensures that low-frequency brain waves, such as delta waves, are accurately captured, while the HFF of 35 Hz allows for the detection of upper alpha and lower beta waves, which are vital for monitoring sleep stages. The sensitivity of 7 µV/mm provides a good balance for viewing the amplitude of the brain signals on the EEG without clipping, allowing for a clear and interpretable waveform. Finally, a sampling rate of 500 Hz is sufficient for capturing detailed