ENGR 311 exam 3 Questions and Answers Already Passed Latest Update

ENGR 311 exam 3 Questions and Answers Already Passed Latest Update bipolar recording montage - Answers each electrode is referenced to an adjacent neighbor referential recording montage - Answers all electrodes are referenced to a single reference electrode physiological artifacts - Answers extraphysiological artifacts - Answers electrical noise in the EEG that originate from outside the body (EX. 60 Hz AC line noise, interferences) strengths of scalp EEG - Answers excellent temporal resolution, low cost, low morbidity, readily repeatable latency - Answers delay between an arbitrary event (stimulus) and another event reactivity - Answers activity or behavior of the subject that affects the waveform alpha waves - Answers f: 8-13 Hz location: stronger in occipital areas reactivity: best when eyes closed mu waves - Answers subset of alpha f: 8-10 Hz location: stronger in centroparietal areas reactivity: decreases in amplitude with contralateral arm movement, the thought of a movement, or tactile stimulation beta waves - Answers f: 13-30 Hz location: mostly frontal and parietal reactivity: mental tasks and concentration, sleep stages 1 and 2, decreases during deep sleep stages theta rhythm - Answers f: 4-8 Hz location: parietal and temporal regions reactivity: early sleep stages (hypnagogic), dreaming states, emotional arousal, navigation delta rhythm - Answers f: 0.5-4 Hz location: frontal and parietal regions reactivity: sleep or relaxed state with eyes closed sleep stage 1 - Answers brief transition stage when first falling asleep sleep stage 2 - Answers k-complexes and sleep spindles begin to appear in the EEG sleep stage 3 - Answers delta waves begin to appear, breathing and pulse slow