Hemiplegia is a condition caused by brain damage or spinal cord injury that leads to paralysis on one side of the body. It causes weakness, problems with muscle control, and muscle stiffness. The degree of hemiplegia symptoms vary depending on the location and extent of the injury.

If hemiplegia onsets before birth, during birth, or within the first 2 years of life, it’s known as congenital hemiplegia. If hemiplegia develops later in life, it’s known as acquired hemiplegia. Hemiplegia is non-progressive. Once the disorder begins, symptoms don’t get worse.