ACNS guidelines – EEG Questions With Complete Solutions

What is the minimal amount of channels needed to record an EEG? correct answer: Sixteen channels What type of current is required for equipment? correct answer: Alternating Current (AC) Filters should be within correct answer: Within recommendations of guideline 4 Evidence suggest material made of these two types of electrodes are best correct answer: Silver-silver chloride or gold disk electrodes are best Impedances must be below correct answer: 10kOhms and must be balanced Appropriate calibration at the beginning of each EEG should be at least correct answer: At least 10 seconds or until it reaches a stable recording The sensitivity of the EEG should be between correct answer: 5 to 10 uV/mm (7uV/mm) The time constant should be at least correct answer: 0.16 second The baseline EEG recording should be a minimum of correct answer: 20 minutes The EEG recordings should include periods of when the eyes are correct answer: open and closed Photic stimulation should be performed in a room with correct answer: Dimmed lighting Photic stimulation should be placed at least ____ from the patients face correct answer: 30 cm Photic stimulation should be performed HV or at least ___ after HV correct answer: 3 minutes Hyperventilation contraindications correct answer: Recent intracranial hemorrhage, significant cardiopulmonary disease, sickle cell disease or trait, or unwillingness to cooperate