Medline NLM definition: a severe emotional disorder of psychotic depth characteristically marked by a retreat from reality with delusion formation, hallucinations, emotional disharmony, and regressive behavior.
Rethink is dedicated to improving the lives of everyone affected by severe mental illness, whether they have a condition themselves, care for others who do, or are professionals or volunteers working in the mental health field.
Mind is a leading mental health charity in England and Wales who work to create a better life for everyone with experience of mental distress.
Brain and Spine Foundation
Information on living with a neurological condition and on diagnosis. There are publications and resources. The useful glossary of neurological conditions (under 'Information and support') includes links to some other organisations as well as to Brain and Spine Foundation information.
Healthtalk: nerves and brain
Personal experiences of people living with various neurological conditions.
Collective voice for 80 organisations, including stroke and brain injury. Organisations are listed at https://www.neural.org.uk/our-members/, a good place to start if looking for information on those conditions. Site also includes information about living with a neurological condition, a glossary, and information about onset and diagnosis as well as a small set of real life stories.
NHS Inform: brain, nerves and spinal cord
NHS inform is Scotland's national health information service, with the aim of providing the people in Scotland with accurate and relevant information to help them make informed decisions about their own health and the health of the people they care for.