Electroencephalography (EEG) Questions and Answers 2023

Electroencephalography (EEG) Questions and Answers 2023 EEG Records the Electric Activity of the Brain Things that EEG diagnose Epilepsy Brain tumor Head injury Encephalopathy Inflammation of the brain (encephalitis) Stroke Sleep disorders Memory impairment EEG waves 4; Alpha, Beta, Delta and Theta Alpha Recorded from Parietal & Occipital Lobes with person: Awake, Relaxed, Eyes Closed Amplitude decreases when the person opens their eyes. Beta Strongest from Frontal Lobes, recorded when Alert, Exposed to Visual Stimuli, Performing Mental Activity Theta Come from Temporal & Occipital lobes Common in Newborn infants Occurs during Sleep in adults, indicates severe Emotional Stress Delta Are from Cerebral Cortex Common during adult sleep & in awake infants Presence in an awake adult indicates Brain Damage Biopac An integrated set of software and hardware for Acquisition (recording) and Analysis of data. 3 components of Biopac Electrodes Mp30 Acquisition unit Computer & Monitor Electrodes Detect electric signals Mp30 Acquisition unit Amplifies the electric signals, converts them into numbers and send them to the computer Computer and monitor Coverts the signals into waves on the computer monitor Waveform concepts Amplitude and time Amplitude Units are shown on the Vertical scale; may be Volts, milli Volts, Degrees, beats per minute, etc. Baseline The reference point for the amplitude. Values above are considered (+) and below are considered (-) Time The units are shown on the Horizontal scale & are in milliseconds, seconds