What is "thalavattam"

Thalavattam ( Malayalam: താളവട്ടം) is a 1986 Malayalam drama film written and directed by Priyadarshan and starring Mohanlal, M. G. Soman and Karthika. The story is based on the movie One Flew Over the Cuckoo's Nest which itself was based on the novel One Flew Over the Cuckoo's Nest. It was remade in Hindi as Kyon Ki in 2005 by Priyadarshan himself. The film was also remade in Tamil in 1988 by Robert-Rajasekhar as Manasukkul Mathappu with Prabhu and Saranya playing the lead.