What does Christian Science teach about mental illnesses?

I understand that Christian Science believes that a person with a physical disease should not seek out medical treatment, but instead rely on prayer. Wikipedia says that adherents believe > …that disease is a mental error rather than physical disorder, and that the sick should be treated not by medicine, but by a form of prayer that seeks to correct the beliefs responsible for the illusion of ill health. > > The church does not require that Christian Scientists avoid all medical care – adherents use dentists, optometrists, obstetricians, physicians for broken bones, and vaccination when required by law – but maintains that Christian Science prayer is most effective when not combined with medicine. I'm curious to know what Christian Science teaches about mental illnesses (e.g. depression, schizophrenia, PTSD, and other mental illnesses recognized by the DSM-5 ). In particular, I'm wondering if mental illnesses are also described as mental errors or if they are something else. Also, what sort of treatment would be permitted? I presume that taking SSRIs and other medication would be strongly discouraged, but is seeking out a counselor permitted?