Oh by the way contracture just means the muscle gets shortened and tight. When one is paralysed or very weak the muscles aren't put through their normal extensibility so they can become abnormally shortened. Sometimes there is also abnormal uncontrolled muscle tension in the muscles generated by the nervous system and this compounds the muscle contracture. It is worthwhile doing what one can to keep the muscles supple as possible as this can cause more problems as time goes on. Positioning and exercise can help with this.