Spasticity We offer an implantable spinal infusion pump ( baclofen pump ) to patients who have failed standard medical management of severe spasticity. Spasticity is an abnormal muscular hyperactivity with increase in muscle tone ( rigidity ), and sustained muscle contractions ( spasm ), caused by damage to the central nervous system. Spasticity occurs when the damaged brain is unable to generate adequate inhibitory stimulus to the spinal cord or when the damaged spinal cord cannot relay the signals to the alpha motor neuron of the spinal cord. The imbalance results in exaggeration of the excitatory impulses reaching the spinal cord from areas of the body below the neural damage.