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.
Other types of surgery may help reduce snoring and contribute to the treatment of sleep apnea by clearing or enlarging air passages: 1  Nasal surgery to remove polyps or straighten a crooked partition between your nostrils (deviated nasal septum) 2  Surgery to remove enlarged tonsils or adenoids. 3  Weight-loss surgery.