The north Indian "Kathak" dance differs from the south Indian "Bharatanatyam" in several ways, even though both have roots in the Hindu text "Natya Shastra". Kathak expressions – particularly in Hindu devotional styles – are more introverted and withdrawn, while "Bharatanatyam" is more extroverted and expansive. "Kathak" is normally performed in a standing form with legs and torso typically straight, while "Bharatanatyam" extensively utilizes bent knee form ("ara mandi", half sitting position that is somewhat similar to "Demi Plié" ballet move).