Mental Disorder
(b) The current definition of mental disorder
The MHA 2007 amended s.1 of the MHA 1983, in many ways simplifying things. It removed the previous 4 categories, and replaced them with one definition of mental disorder.
Section 1(2) MHA 1983 now simply defines mental disorder as;
‘Any disorder or disability of the mind’
Note: No-one should be considered to be mentally disordered solely because of their political, religious or cultural beliefs, values or opinions.
Some exclusions from what can be considered to be a mental disorder for the MHA 1983 purposes still remain for example in relation to those with a learning disability.
As with the earlier provisions, the current MHA 1983 requires a disorder/ disability of the mind. Contrast this with the application of the Mental Capacity Act 2005 (MCA 2005) which applies to an impairment or disturbance of functioning of mind or brain.
Let’s look at the guidance on the s.1 definition of mental disorder is given at Chapter 2 of the Code of Practice, including a ‘table’ below (at Figure 1) of examples of clinically recognised conditions that fall within the definition of mental disorder.
Figure 1: Clinically recognised conditions which could fall within the Act’s definition of mental disorder
- Affective disorders, such as depression and bipolar disorder
- Schizophrenia and delusional disorders
- Neurotic, stress-related and somatoform disorders, such as anxiety, phobic disorders, obsessive compulsive disorders, post-traumatic stress disorder and hypochondriacal disorders
- Organic mental disorders such as dementia and delirium (however caused)
- Personality and behavioural changes caused by brain injury or damage (however acquired)
- Personality disorders (see paragraphs 2.19 – 2.20 and chapter 21)
- Mental and behavioural disorders caused by psychoactive substance use (see paragraphs 2.9 – 2.13)
- Eating disorders, non-organic sleep disorders and non-organic sexual disorders
- Learning disabilities (see paragraphs 2.14 – 2.18 and chapter 20)
- Autistic spectrum disorders (including Asperger’s syndrome) (see paragraphs 2.14 – 2.18 and chapter 20)
- Behavioural and emotional disorders of children and young people
- (Note: this list is not exhaustive)
Note: The previous exemptions for “promiscuity or other immoral act” have not been included in the amendments made by the 2007 Mental Health Act. This means that persons diagnosed with paedophilia can be detained in hospital by virtue of that alone.