(a) A person is not responsible for criminal conduct if at the time of such conduct as a result of mental disease or defect he did not know or appreciate the nature, quality or wrongfulness of his conduct or was incapable of conforming his conduct to the requirements of law.

    (b) The procedures for the defense of lack of responsibility because of mental disease or defect are governed by the applicable provisions of chapter 522 RSMo.

(Code 1964, § 7.625)

     State law reference(s)--Similar provisions, RSMo. § 562.086.