Polysomnography questions with correct answers

What is a polysomnography? CORRECT ANSWER Sleep study What part of the brain are we most interested in? CORRECT ANSWER Thalamus, controls consciousness and sleep What is an electroencephalogram (EEG)? CORRECT ANSWER A measure of electrical activity of the brain recorded across the scalp. What is an electrooculgraphy (EOG)? CORRECT ANSWER Measures electrical activity of the eye and is essential for the documentation of the rapid eye movements characteristic of REM sleep. What is obstructive sleep apnea? CORRECT ANSWER Airway is blocked by tongue, uvula, soft palate or another foreign object. So, airflow is flat lining due to tongue moving to back of the mouth, but respiratory movements continue as seen in esophageal pressure. What is central sleep apnea? CORRECT ANSWER Part of brain stem not working properly. Not receiving signals from the brain. No airflow, and lungs are not trying to move in and out to receive ventilation. What is mixed sleep apnea? CORRECT ANSWER Combination of obstructive and central sleep apnea. Airflow and esophageal pressure flat line, but every once in while lungs try to ventilate. What esophageal pressure? CORRECT ANSWER Esophagus is as close as we can get to lungs, indirect measurement, so reflect