People with osteoarthritis often have joint pain and reduced motion. Unlike some other forms of arthritis, osteoarthritis affects only joints and not internal organs. Rheumatoid arthritis-the second most common form of arthritis-affects other parts of the body besides the joints.eople with osteoarthritis often have joint pain and reduced motion. Unlike some other forms of arthritis, osteoarthritis affects only joints and not internal organs. Rheumatoid arthritis-the second most common form of arthritis-affects other parts of the body besides the joints.
Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia, Wikipedia. Related to sleep fragmentation: polysomnography, polysomnogram. Arousals and awakenings that disrupt the normal stages and architecture of sleep. These events, which occur commonly in patients who have sleep apnea or chronic pain, contribute to daytime sleepiness and other health problems. Synonym: sleep interruption.
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. 3  Central sleep apnea is caused by a failure of the brain to activate the muscles of breathing during sleep.