Night Terrors Is There A Connection Between Sleepwalking And Night Terrors?

Is there a connection between sleepwalking and night terrors? - night terrors

My almost three years, the girl or have nightmares or night terrors. Sometimes sleepwalking. Can somebody the difference between nightmares and night terrors? Is there a relationship between nightmares / night terrors and sleepwalking? Finally, the causes of sleepwalking?

Thank you.