Spasticity is related to spastic paraplegia 41, autosomal dominant and spastic paraplegia 19, autosomal dominant. An important gene associated with Spasticity is SPAST (Spastin), and among its related pathways/superpathways is Sudden infant death syndrome (SIDS) susceptibility pathways. The drugs Dopamine and Memantine have been mentioned in the context of this disorder. Affiliated tissues include spinal cord and brain, and related phenotypes are nervous system and growth/size/body region