Dr. Matilda Hellman is a research director at the Faculty of Social Sciences, University of Helsinki and head of the Centre for Research on Addiction, Control and Governance (CEACG).Dr. Michael Egerer is a university researcher at the University of Helsinki Centre for Research on Addiction, Control and Governance (CEACG).Janne Stoneham (BA Hons Soc. Sci.) works as a research assistant at the University of Helsinki Centre for Research on Addiction, Control and Governance (CEACG).Dr. Sarah Forberger is a senior scientist at the Leibniz Institute for Prevention Research and Epidemiology – BIPS.Vilja Männistö-Inkinen (M.Soc.Sci) works as a technical assistant at the University of Helsinki Centre for Research on Addiction, Control and Governance (CEACG).Doris Ochterbeck (MSc) works as a research associate at the Leibnitz Institute for Prevention Research and Epidemiology –BIPS.Samantha Rundle (MA) is a PhD candidate and graduate trainee at the University of Toronto and the Centre for Addiction and Mental Health.

• 1 Introduction- 2 Brain-Based Addiction as an Epistemic Project- 3 Popular Representations- 4 Epistemic Frameworks, Science Fields and Researchers- 5 The Brain Paradigm in the Addiction Service Field- 6 The Brain in Treatment Settings- 7 The Brain in Substance Use Prevention- 8 Conclusions.

Dr. Matilda Hellman is a research director at the Faculty of Social Sciences, University of Helsinki and head of the Centre for Research on Addiction, Control and Governance (CEACG).Dr. Michael Egerer is a university researcher at the University of Helsinki Centre for Research on Addiction, Control and Governance (CEACG).Janne Stoneham (BA Hons Soc. Sci.) works as a research assistant at the University of Helsinki Centre for Research on Addiction, Control and Governance (CEACG).Dr. Sarah Forberger is a senior scientist at the Leibniz Institute for Prevention Research and Epidemiology – BIPS.Vilja Männistö-Inkinen (M.Soc.Sci) works as a technical assistant at the University of Helsinki Centre for Research on Addiction, Control and Governance (CEACG).Doris Ochterbeck (MSc) works as a research associate at the Leibnitz Institute for Prevention Research and Epidemiology –BIPS.Samantha Rundle (MA) is a PhD candidate and graduate trainee at the University of Toronto and the Centre for Addiction and Mental Health.

• 1 Introduction- 2 Brain-Based Addiction as an Epistemic Project- 3 Popular Representations- 4 Epistemic Frameworks, Science Fields and Researchers- 5 The Brain Paradigm in the Addiction Service Field- 6 The Brain in Treatment Settings- 7 The Brain in Substance Use Prevention- 8 Conclusions.

Dr. Matilda Hellman is a research director at the Faculty of Social Sciences, University of Helsinki and head of the Centre for Research on Addiction, Control and Governance (CEACG).Dr. Michael Egerer is a university researcher at the University of Helsinki Centre for Research on Addiction, Control and Governance (CEACG).Janne Stoneham (BA Hons Soc. Sci.) works as a research assistant at the University of Helsinki Centre for Research on Addiction, Control and Governance (CEACG).Dr. Sarah Forberger is a senior scientist at the Leibniz Institute for Prevention Research and Epidemiology – BIPS.Vilja Männistö-Inkinen (M.Soc.Sci) works as a technical assistant at the University of Helsinki Centre for Research on Addiction, Control and Governance (CEACG).Doris Ochterbeck (MSc) works as a research associate at the Leibnitz Institute for Prevention Research and Epidemiology –BIPS.Samantha Rundle (MA) is a PhD candidate and graduate trainee at the University of Toronto and the Centre for Addiction and Mental Health.

• 1 Introduction- 2 Brain-Based Addiction as an Epistemic Project- 3 Popular Representations- 4 Epistemic Frameworks, Science Fields and Researchers- 5 The Brain Paradigm in the Addiction Service Field- 6 The Brain in Treatment Settings- 7 The Brain in Substance Use Prevention- 8 Conclusions.