Eye colors depend on the amount of pigment (melanin) found in the iris and how it is distributed. Light gray-blue eyes contain much less pigment than extremely dark brown eyes. And there are many shades of eye color in between. SEE ALSO: What Determines Hazel Eye Color >.
Dystonia is a movement disorder in which a person's muscles contract uncontrollably. The contraction causes the affected body part to twist involuntarily, resulting in repetitive movements or abnormal postures. Dystonia can affect one muscle, a muscle group, or the entire body.ystonia can affect different body parts, and often the symptoms of dystonia progress through stages. Some early symptoms include: 1  A dragging leg. 2  Cramping of the foot. 3  Involuntary pulling of the neck. 4  Uncontrollable blinking.
Medications for Dystonia. What is Dystonia: Dystonia is a syndrome of abnormal muscle contraction that produces repetitive involuntary twisting movements and abnormal posturing of the neck, trunk, face, and extremities. Compare drugs associated with Dystonia.