Systemic therapy is rooted in family therapy, a therapeutic adaptation of a larger interdisciplinary field known as systems theory.
Systems theory is a study of the complex systems present in nature, science and society, and its framework investigates and describes any group of objects that work together to produce a result. This could be a single organism such as a plant or a single human, or it could apply to a large organisation or indeed a family.
The therapy seeks to address people by understanding problems in a contextual framework within the system in which they live.
(Source: http://www.counselling-directory.org.uk/family-therapy.html)
Eye Movement Desensitization and Reprocessing (EMDR) is a psychotherapy treatment that was originally designed to alleviate the distress associated with traumatic memories
Please see the following link to the EMDR institute for further information:
https://www.emdr.com/what-is-emdr/