Niels Okkels

1.8k total citations
33 papers, 623 citations indexed

About

Niels Okkels is a scholar working on Neurology, General Health Professions and Cognitive Neuroscience. According to data from OpenAlex, Niels Okkels has authored 33 papers receiving a total of 623 indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Neurology, 8 papers in General Health Professions and 5 papers in Cognitive Neuroscience. Recurrent topics in Niels Okkels's work include Parkinson's Disease Mechanisms and Treatments (9 papers), Neurological disorders and treatments (7 papers) and Mental Health and Psychiatry (5 papers). Niels Okkels is often cited by papers focused on Parkinson's Disease Mechanisms and Treatments (9 papers), Neurological disorders and treatments (7 papers) and Mental Health and Psychiatry (5 papers). Niels Okkels collaborates with scholars based in Denmark, United Kingdom and United States. Niels Okkels's co-authors include Povl Munk‐Jørgensen, Christina Blanner Kristiansen, Lea Nørgreen Gustafsson, Steve W. Cole, Renée D. Goodwin, Niklas Worm Andersson, Farah Taha, Norman Sartorius, Per Borghammer and Jacob Horsager and has published in prestigious journals such as NeuroImage, Brain and Scientific Reports.

In The Last Decade

Niels Okkels

32 papers receiving 614 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Niels Okkels Denmark 14 156 129 128 85 82 33 623
Giulia Menculini Italy 16 189 1.2× 293 2.3× 45 0.4× 53 0.6× 62 0.8× 62 681
Baptiste Pignon France 15 299 1.9× 261 2.0× 104 0.8× 57 0.7× 65 0.8× 66 681
Roos C. van der Mast Netherlands 14 69 0.4× 202 1.6× 80 0.6× 25 0.3× 105 1.3× 25 786
Teresa Bobes-Bascarán Spain 15 273 1.8× 208 1.6× 45 0.4× 39 0.5× 69 0.8× 42 711
Giovanna Fico Spain 17 355 2.3× 389 3.0× 57 0.4× 56 0.7× 42 0.5× 50 758
Roni Shiloh Israel 17 504 3.2× 179 1.4× 60 0.5× 54 0.6× 118 1.4× 34 1.0k
Sara J. Walker United States 13 117 0.8× 138 1.1× 108 0.8× 14 0.2× 62 0.8× 23 759
Hale Yapıcı Eser Türkiye 13 191 1.2× 325 2.5× 124 1.0× 32 0.4× 74 0.9× 45 883
Andrew Mayers United Kingdom 15 181 1.2× 185 1.4× 38 0.3× 24 0.3× 64 0.8× 28 877
Pia Gudmundsson Sweden 14 232 1.5× 57 0.4× 29 0.2× 142 1.7× 52 0.6× 24 643

Countries citing papers authored by Niels Okkels

Since Specialization
Citations

This map shows the geographic impact of Niels Okkels's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Niels Okkels with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Niels Okkels more than expected).

Fields of papers citing papers by Niels Okkels

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Niels Okkels. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Niels Okkels. The network helps show where Niels Okkels may publish in the future.

Co-authorship network of co-authors of Niels Okkels

This figure shows the co-authorship network connecting the top 25 collaborators of Niels Okkels. A scholar is included among the top collaborators of Niels Okkels based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Niels Okkels. Niels Okkels is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Johnsen, Erik, Mette Møller, Erik Hvid Danielsen, et al.. (2025). Cholinergic patterns correlate with dopamine medication ON freezing of gait in Parkinson's disease. Brain. 148(12). 4508–4518.
2.
Okkels, Niels, Michel J. Grothe, John‐Paul Taylor, et al.. (2024). Cholinergic changes in Lewy body disease: implications for presentation, progression and subtypes. Brain. 147(7). 2308–2324. 21 indexed citations
3.
Borghammer, Per, Niels Okkels, & Daniel Weintraub. (2024). Parkinson’s Disease and Dementia with Lewy Bodies: One and the Same. Journal of Parkinson s Disease. 14(3). 383–397. 9 indexed citations
4.
Knudsen, Karoline, et al.. (2024). Non-motor asymmetry and dopamine degeneration in Parkinson’s disease. Brain Communications. 7(1). fcaf002–fcaf002. 1 indexed citations
5.
Fedorova, Tatyana D., Karoline Knudsen, Jacob Horsager, et al.. (2023). Dopaminergic Dysfunction Is More Symmetric in Dementia with Lewy Bodies Compared to Parkinson’s Disease. Journal of Parkinson s Disease. 13(4). 515–523. 18 indexed citations
6.
Okkels, Niels, Jacob Horsager, Miguel A. Labrador‐Espinosa, et al.. (2023). Distribution of cholinergic nerve terminals in the aged human brain measured with [18F]FEOBV PET and its correlation with histological data. NeuroImage. 269. 119908–119908. 13 indexed citations
7.
Okkels, Niels, Jacob Horsager, Miguel A. Labrador‐Espinosa, et al.. (2023). Severe cholinergic terminal loss in newly diagnosed dementia with Lewy bodies. Brain. 146(9). 3690–3704. 29 indexed citations
8.
Horsager, Jacob, Niels Okkels, Tatyana D. Fedorova, et al.. (2022). [18F]FEOBV positron emission tomography may not be a suitable method to measure parasympathetic denervation in patients with Parkinson's disease. Parkinsonism & Related Disorders. 104. 21–25. 3 indexed citations
9.
Cesari, Matteo, Christopher E. J. Doppler, Niels Okkels, et al.. (2022). RBDtector: an open-source software to detect REM sleep without atonia according to visual scoring criteria. Scientific Reports. 12(1). 20886–20886. 9 indexed citations
10.
Horsager, Jacob, Niels Okkels, Nathalie Van Den Berge, et al.. (2022). In vivo vesicular acetylcholine transporter density in human peripheral organs: an [18F]FEOBV PET/CT study. EJNMMI Research. 12(1). 17–17. 6 indexed citations
11.
Horsager, Jacob, Casper Skjærbæk, Karoline Knudsen, et al.. (2021). Fasting gallbladder volume is increased in patients with Parkinson's disease. Parkinsonism & Related Disorders. 87. 56–60. 4 indexed citations
12.
Horsager, Jacob, Uwe Walter, Tatyana D. Fedorova, et al.. (2021). Vagus Nerve Cross-Sectional Area in Patients With Parkinson's Disease—An Ultrasound Case-Control Study. Frontiers in Neurology. 12. 681413–681413. 15 indexed citations
13.
Okkels, Niels, Christina Blanner Kristiansen, Povl Munk‐Jørgensen, & Norman Sartorius. (2018). Urban mental health. Current Opinion in Psychiatry. 31(3). 258–264. 76 indexed citations
14.
Okkels, Niels, Christina Blanner Kristiansen, & Povl Munk‐Jørgensen. (2016). Mental Health and Illness in the City. 1 indexed citations
15.
Okkels, Niels, Betina B. Trabjerg, Mikkel Arendt, & Carsten Bøcker Pedersen. (2016). Traumatic Stress Disorders and Risk of Subsequent Schizophrenia Spectrum Disorder or Bipolar Disorder: A Nationwide Cohort Study. Schizophrenia Bulletin. 43(1). 180–186. 40 indexed citations
16.
Andersson, Niklas Worm, Lea Nørgreen Gustafsson, Niels Okkels, et al.. (2015). Depression and the risk of autoimmune disease: a nationally representative, prospective longitudinal study. Psychological Medicine. 45(16). 3559–3569. 71 indexed citations
17.
Munk‐Jørgensen, Povl, et al.. (2015). The gap between available knowledge and its use in clinical psychiatry. Acta Psychiatrica Scandinavica. 132(6). 441–450. 18 indexed citations
18.
Okkels, Niels, et al.. (2015). Training students in research and scientific writing. Acta Psychiatrica Scandinavica. 132(6). 431–432. 2 indexed citations
19.
Okkels, Niels, et al.. (2013). A nationwide study on delirium in psychiatric patients from 1995 to 2011. Acta Neuropsychiatrica. 26(4). 234–239. 10 indexed citations
20.
Bauer, Jeanett, Niels Okkels, & Povl Munk‐Jørgensen. (2012). State of psychiatry in Denmark. International Review of Psychiatry. 24(4). 295–300. 17 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Giulia Menculini Breakdown of academic impact, for papers by Baptiste Pignon Breakdown of academic impact, for papers by Roos C. van der Mast Breakdown of academic impact, for papers by Teresa Bobes-Bascarán Breakdown of academic impact, for papers by Giovanna Fico Breakdown of academic impact, for papers by Roni Shiloh Breakdown of academic impact, for papers by Sara J. Walker Breakdown of academic impact, for papers by Hale Yapıcı Eser Breakdown of academic impact, for papers by Andrew Mayers Breakdown of academic impact, for papers by Pia Gudmundsson
Rankless by CCL
2026