EEG Instrumentation and Filters

Sampling rate

• The number of points used to create the waveform

• The number of times a wave occurs in 1 second

• The ratio of input voltage to pen deflection

• Electronic device that can increase the power of a signal

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-5

Nyquist Theorem states:

• The sampling rate should be at least twice as fast as the fastest frequency being recorded

• Describes particular circuits within the amplifiers that attenuate frequencies or frequency bands

• A system is measured at an insufficient sampling rate and creates a frequency misrepresentation of the recorded activity.

• The rate at which the waveform data is sampled in order to convert it into a numerical format

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-5

This occurs when a system is measured at an insufficient sampling rate and creates a frequency misrepresentation of the recorded activity.

• Sampling rate

• Phase lag

• Aliasing

• Common mode rejection

If sampling points ____________, dwell time _____________.

• increases; decreases

• decreases; increases

• increases; stays the same

• decreases; stays the same

The amplifier contains:

• High filter

• Low filter

• Sensitivity

• Rejection/60 cycle filter

• Paper Speed

Differential amplifier

• Subtracts one signal's voltage from another signal

• Amplifies the difference between two signals

• Utilizes the polarity convention to display waveforms

• Electronic device that can increase the power of a signal

• Describes particular circuits within the amplifiers that attenuate frequencies or frequency bands

Common mode rejection only works if the electrode impedance is both low and balanced.

• True

• False

What function allows the EEG to be re-montaged?

• Analog-digital converter

• Common mode rejection

• Differential amplifier

• Screen display

The range of frequencies between Low Filter and High Filter settings is the:

• Bandwidth

• Analog-digital converter

• Differential amplifier

• Common mode rejection

Another name for the Low Frequency Filter is:

• High Pass Filter

• Low Pass Filter

• High Frequency Filter

• Sensitivity

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-5