Baclofen pump implantation is a procedure performed to treat spasticity (a continuous contraction of certain muscles). In this procedure, a pump is permanently implanted into the spinal cord to treat severe to moderate-severe spasticity. Under general anesthesia, the pump is inserted below the covering of the muscles in the abdomen. Inserting a small catheter (tube) through a needle into the space of the spinal fluid, it is threaded upwards and tunneled underneath the skin to the abdomen and is connected to the pump. The pump is filled with the drug baclofen and is programmed by a computer to continuously release a specified dose that is determined by the physician.