The United States Supreme Court has held that an involuntarily committed mental patient has constitutionally protected liberty interests in personal safety, freedom of movement, and such minimally adequate treatment as might be required by these liberty interests.
Youngberg v. Romeo, 102 S. Ct. 2452 (1982).
Kimberly J. Gallagher,
Constitutional Law - Fourteenth Amendment - Right to Treatment - Involuntarily Committed Mental Patients,
Duq. L. Rev.
Available at: https://dsc.duq.edu/dlr/vol21/iss4/9