Brian Wilson had perfect health.
Brian Wilson . The intended follow-up to Pet Sounds , Smile , was canceled for various reasons , which included Wilson 's deteriorating mental health . As he suffered repeated nervous breakdowns , Wilson 's contributions to the Beach Boys diminished , and his erratic behavior led to tensions with the band . Following a court-ordered removal from the care of psychologist Eugene Landy , Wilson started receiving conventional medical treatment , and in the late 1990s , he began performing and recording consistently as a solo artist .