what is Sps means
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 donât 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.