The family of John Singleton, the director, producer, and screenwriter best known for his 1991 film “Boyz N the Hood,” is fighting for control of his business affairs after he suffered a stroke. His mother is seeking to be appointed his temporary conservator, and claims Mr. Singleton is in a coma, which several of his children dispute.

Mr. Singleton, 51, had a stroke on April 17 and was hospitalized in an intensive care unit. At the time, his family said in a statement he was under “great medical care.”

A native of South Los Angeles, Mr. Singleton has directed more than 10 films and TV series, including the recent FX crime drama “Snowfall” starring Damson Idris. Mr. Singleton was nominated for an Oscar for best director for “Boyz N the Hood,” his debut feature film. He has also directed classics like “Poetic Justice” and “Rosewood.”

His mother, Shelia Ward, filed papers in court in Los Angeles on Thursday seeking to be named his conservator, or guardian. In the papers, Ms. Ward said her son was in a coma.