I am a cognitive neuroscientist interested in habits and how they find their way into the brain. The neurotransmitter dopamine particularly motivates me. Currently, I work as a postdoctoral researcher at the Institute of Psychology at Otto von Guericke University Magdeburg in Germany. On this website, I collect (links to) my work and related topics that are dear to my heart.

This website is under construction.

by Kokota, EE thenounproject.com

brief CV


’17 | PhD in Medical Sciences
@Radboud University Nijmegen, Donders Institute

Thesis on neurocognitive mechanisms of compulsive behavior (thesis)

’11 | MSc in Cognitive Neuroscience
@Radboud University Nijmegen

Thesis on state-dependent tactile processing in rat barrel cortex (thesis)

’09 | BSc in Psychobiology
@University of Amsterdam

Thesis on motor imagery (doi)


’21-now | Postdoc
@OVGU, Neuropsychology, Madgeburg

’17-’21 | Postdoc
@Leipzig University, MPI-CBS, Leipzig

Behavioral & imaging studies on dopamine, learning, working memory, and decision-making in diet-induced obesity

’12-’17 | PhD
@Radboud University Nijmegen, Donders Institute

Intervention study on the neurcognitive mechanisms of mindful eating

’11-’12 | Research Assistant
@Radboudumc Nijmegen, Donders Institute

Pharmacological study on the role of dopamine in gambling


Experimental methods | behavioral paradigms of reinforcement learning, reward-processing, decision-making, cognitive control, motor imagery | neuroimaging: fMRI, PET, EEG, intracranial EEG (rats) | interventions: pharmacological dopamine agents, dietary dopamine depletion, mindful eating vs. active control

Coding | R, Matlab (SPM, Psychtoolbox, Fieldtrip), Octave, Presentation, and a bit of Python

Key publications

Janssen, LK, Mahner, FP, Schlagenhauf, F, Deserno, L, & Horstmann, A (2020). Reliance on model-based and model-free control in obesity. Sci Rep 10, 22433. https://doi.org/10.1038/s41598-020-79929-0

Janssen, LK, Herzog, N, Waltmann, M et al. (2019). Lost in Translation? On the Need for Convergence in Animal and Human Studies on the Role of Dopamine in Diet-Induced Obesity. Curr Addict Rep 6, 229–257.

van Holst, RJ, Sescousse, G, Janssen, LK, Janssen, M, Berry, AS, Jagust, WJ, & Cools, R (2018). Increased Striatal Dopamine Synthesis Capacity in Gambling Addiction. Biological psychiatry, 83(12), 1036–1043. https://doi.org/10.1016/j.biopsych.2017.06.010

Janssen LK, Duif I, van Loon I, Wegman J, de Vries JHM, Cools R, & Aarts E (2017). Loss of lateral prefrontal cortex control in food-directed attention and goal-directed food choice in obesity. Neuroimage 146, 148-156. https://doi.org/10.1016/j.neuroimage.2016.11.015

Janssen, LK, Sescousse, G, Hashemi, MM, et al. (2015). Abnormal modulation of reward versus punishment learning by a dopamine D2-receptor antagonist in pathological gamblers. Psychopharmacology 232, 3345–3353. https://doi.org/10.1007/s00213-015-3986-y





  • 2021. Jul. Bad habits (German). Ach Mensch! Podcast.
  • 2020. Feb. Dopamine fasting (German). Circus of Science. Leipzig.
  • 2017. Nov. Mindful eating (Dutch). Coffee&Science. InScience Film Festival. Lux. Nijmegen.
  • 2017. Jun. Breaking Bad Habits (Dutch). Public Symposium. Donders Institute. Nijmegen.
  • 2016. Jun. Resisting temptations (Dutch). Waddenacademie. Cultural festival Oerol. Terschelling.
  • 2016. Apr. Breaking bad habits (English). FameLab Nationals. Utrecht.
  • 2016. Mar. Resisting temptations (English). FameLab Regionals. Lux. Nijmegen.
  • 2015. Nov. Mindful eating (Dutch). “Universiteit van Beek”. Library of Beek. Beek.
  • 2015. Sep. Brain Art (Dutch). Radboud Researchers Night. Lux. Nijmegen.
  • 2015. Mar. High school masterclass. Brain Awareness Week. Elzendaalcollege. Boxmeer.