Author

Jarkko J. Johansson

Umeå UniversityORCID 0000-0002-4501-4735Unclaimed ORCID profile · follow to get notified of new preprints

Biology Disciplines

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Signature Assays, Organisms & Methods

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Organism:human· 8 Approach:statistical model· 7 Assay:imaging· 6 Research Focus:differential expression· 3 Research Focus:spatial domain detection· 2 Research Focus:cell-cell communication· 1 Approach:deep learning· 1

Frequent Co-Authors

Alireza SalamiiD· 6 shared Lars BäckmaniD· 6 shared Kristin NordiniD· 5 shared Robin PederseniD· 5 shared Anna RieckmanniD· 4 shared Lars H NybergiD· 4 shared Farshad FalahatiiD· 3 shared Micael AnderssoniD· 3 shared

Activity by Year

2022-2026 · peak 3/yr

Co-Author Collaboration Network

10 top collaborators · 45 mutual co-author links

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6 shared papersNeuroscience

Alireza SalamiORCID

Mutual co-authors in cluster

Author profile →

8 papers

Recent·Most cited

Inter-individual variability of neurotransmitter receptor and transporter density in the human brain

Justine Y. Hansen, Jouni Tuisku, Jarkko J. Johansson, Zeyu Chang, Colm J. McGinnity, Vincent Beliveau, Synthia Guimond, Melanie Ganz, Martin Nørgaard, Marian Galovic, Gleb Bezgin, Sylvia M. L. Cox, Jarmo A. Hietala, Marco Leyton, Eliane Kobayashi, , Bratislav Mišić

This study quantifies inter-individual variability in PET-estimated receptor and transporter density across 12 neurotransmitter systems in the human brain.

Brain Structure and Function · Jan 13, 2026Peer-reviewedNeuroscience

Different dopaminergic circuits defined by D2/D3 receptor availablity patterns show structure-specific links to memory in ageing

Yeo‐Jin Yi, Jarkko J. Johansson, Berta Garcia‐Garcia, Peter Schulze, Kathrin Baldauf, Ines Bodewald, Marianne Patt, Swen Hesse, Andreas Schildan, Philipp Genseke, Simone Agnes Schenke, Matthew J. Betts, Joel Dunn, Christin Y.M. Sander, Osama Sabri, , Dorothea Hämmerer

This study links dopamine receptor availability in specific brain regions to memory performance in older adults, identifying distinct dopaminergic circuits associated with different memory outcomes.

bioRxiv · Jul 17, 2025 · PreprintNeuroscience

Two long-axis dimensions of hippocampal cortical integration support memory function across the adult lifespan

Kristin Nordin, Robin Pedersen, Farshad Falahati, Jarkko J. Johansson, Filip Grill, Micael Andersson, Saana M. Korkki, Lars Bäckman, Andrew Zalesky, Anna Rieckmann, Lars H Nyberg, Alireza Salami

The paper shows two hippocampal integration dimensions persist across adulthood, relate to memory and dopamine distribution, and decline with age.

eLife · Mar 20, 2025Peer-reviewedNeuroscience

Dedifferentiation of caudate functional organization is linked to reduced D1 dopamine receptor availability and poorer memory function in aging

Saana M. Korkki, Jarkko J. Johansson, Kristin Nordin, Robin Pedersen, Lars Bäckman, Anna Rieckmann, Alireza Salami

The paper investigates how reduced dopamine D1 receptor availability in aging is linked to decreased functional specificity in cortico-striatal circuits and poorer memory performance.

Imaging Neuroscience · Jan 1, 2025Peer-reviewedNeuroscience

Brain-Cognitive Gaps in relation to Dopamine and Health-related Factors: Insights from AI-Driven Functional Connectome Predictions

Morteza Esmaeili, Erin Beate Bjørkeli, Robin Pedersen, Farshad Falahati, Jarkko J. Johansson, Kristin Nordin, Nina Karalija, Lars Bäckman, Lars H Nyberg, Alireza Salami

The paper uses deep learning to predict cognitive performance from functional connectomes during different brain states and identifies the brain-cognition gap as a dopamine-related marker of cognitive vulnerability.

bioRxiv · Nov 19, 2024 · PreprintNeuroscience

Dopamine D1-receptor Organization Contributes to Functional Brain Architecture

Robin Pedersen, Jarkko J. Johansson, Kristin Nordin, Anna Rieckmann, Anders Wåhlin, Lars H Nyberg, Lars Bäckman, Alireza Salami

The paper shows that dopamine D1 receptor organization in humans aligns with a unimodal-to-transmodal functional gradient and influences network differentiation and connectivity.

Journal of Neuroscience · Feb 1, 2024Peer-reviewedNeuroscience

The iron-dopamine D1 coupling modulates neural signatures of working memory across adult lifespan

Jonatan Gustavsson, Jarkko J. Johansson, Farshad Falahati, Micael Andersson, Goran Papenberg, Bárbara Avelar‐Pereira, Lars Bäckman, Grégoria Kalpouzos, Alireza Salami

The paper investigates the relationship between brain iron levels and dopamine D1 receptors across the adult lifespan, finding that elevated iron and reduced D1DR in older adults correlate with impaired working memory.

NeuroImage · Aug 13, 2023Peer-reviewedNeuroscience

Bi-phasic patterns of age-related differences in dopamine D1 receptors across the adult lifespan

Jarkko J. Johansson, Kristin Nordin, Robin Pedersen, Nina Karalija, Goran Papenberg, Micael Andersson, Saana M. Korkki, Katrine Riklund, Marc Guitart‐Masip, Anna Rieckmann, Lars Bäckman, Lars H Nyberg, Alireza Salami

The paper identifies a bi-phasic pattern of age-related dopamine D1 receptor decline, with distinct functional consequences before and after 40 years of age.

bioRxiv · May 24, 2022 · PreprintNeuroscience