The DRS stands for Drag Reduction System, which enables a car to open its rear wing to limit the downforces on the car. This increases the car's theoretical performance and in theory facilitates passing.
Sleep apnea facts. 1  Sleep apnea is defined as a reduction or cessation of breathing during sleep. 2  The three types of sleep apnea are central apnea, obstructive apnea, and a mixture of central and obstructive apnea.  Central sleep apnea is caused by a failure of the brain to activate the muscles of breathing during sleep.
Medical Definition of central sleep apnea. : sleep apnea that is caused by a disturbance in the brain's respiratory center Less common is central apnea (not usually linked to snoring), in which the brain fails to send the appropriate signals to the breathing muscles.âAndrew Weil, Self Healing, March 2002âcompare obstructive sleep apnea.