Was 2013 the year of Pharrell Williams? With chart toppers such as Blurred Lines and Get Lucky, this writing and producing veteran has suddenly become a rising star.
1 Take the Exercise and Fitness Quiz!  AMS (acute mountain sickness): Acute mountain sickness (AMS) is the effect on the body of being in a high altitude environment. AMS is common at high altitudes, that is above 8,000 feet (2,440 meters). Three-quarters of people have mild symptoms of AMS over 10,000 feet (3,048 meters).
Stiff-person syndrome (SPS) is a rare neurological disorder with features of an autoimmune disease.SPS is characterized by fluctuating muscle rigidity in the trunk and limbs and a heightened sensitivity to stimuli such as noise, touch, and emotional distress, which can set off muscle spasms.Abnormal postures, often hunched over and stiffened, are characteristic of the disorder.t is frequently associated with other autoimmune diseases such as diabetes, thyroiditis, vitiligo, and pernicious anemia. Scientists donât yet understand what causes SPS, but research indicates that it is the result of an autoimmune response gone awry in the brain and spinal cord.