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.
Central sleep apnea is a much less common type of sleep apnea that involves the central nervous system, occuring when the brain fails to signal the muscles that control breathing. People with central sleep apnea seldom snore. Complex sleep apnea is a combination of obstructive sleep apnea and central sleep apnea.