Ursula Ptok

1.3k total citations
25 papers, 965 citations indexed

About

Ursula Ptok is a scholar working on Physiology, Psychiatry and Mental health and Molecular Biology. According to data from OpenAlex, Ursula Ptok has authored 25 papers receiving a total of 965 indexed citations (citations by other indexed papers that have themselves been cited), including 11 papers in Physiology, 6 papers in Psychiatry and Mental health and 5 papers in Molecular Biology. Recurrent topics in Ursula Ptok's work include Alzheimer's disease research and treatments (8 papers), Dementia and Cognitive Impairment Research (6 papers) and S100 Proteins and Annexins (3 papers). Ursula Ptok is often cited by papers focused on Alzheimer's disease research and treatments (8 papers), Dementia and Cognitive Impairment Research (6 papers) and S100 Proteins and Annexins (3 papers). Ursula Ptok collaborates with scholars based in Germany, Sweden and Australia. Ursula Ptok's co-authors include Reinhard Heun, Andreas Papassotiropoulos, Frank Jessen, Klaus von Bergmann, Dieter Lütjohann, Katrin Barkow, Martin Kockler, Wolfgang Maier, Heike Kölsch and M. Bagli and has published in prestigious journals such as Neurology, Molecular Psychiatry and Neuroreport.

In The Last Decade

Ursula Ptok

25 papers receiving 937 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ursula Ptok Germany 14 471 296 252 237 98 25 965
Silje Skrede Norway 22 342 0.7× 454 1.5× 262 1.0× 328 1.4× 49 0.5× 53 1.4k
Karen Sundell United States 20 534 1.1× 370 1.3× 93 0.4× 448 1.9× 117 1.2× 40 1.4k
Frank Hentschel Germany 19 309 0.7× 209 0.7× 119 0.5× 256 1.1× 95 1.0× 72 1.1k
Marie‐Louise Holm Denmark 13 162 0.3× 228 0.8× 172 0.7× 117 0.5× 72 0.7× 27 800
Elena Y. Bryleva United States 12 214 0.5× 290 1.0× 190 0.8× 116 0.5× 78 0.8× 14 931
Lan Cao China 20 386 0.8× 259 0.9× 81 0.3× 162 0.7× 167 1.7× 40 1.2k
H. Wormstall Germany 13 297 0.6× 148 0.5× 180 0.7× 90 0.4× 97 1.0× 29 797
Audun Osland Vik‐Mo Norway 14 265 0.6× 280 0.9× 211 0.8× 318 1.3× 29 0.3× 25 892
Nobuto Shibata Japan 21 564 1.2× 529 1.8× 159 0.6× 251 1.1× 138 1.4× 101 1.6k
Giuseppe Gambina Italy 22 483 1.0× 232 0.8× 52 0.2× 342 1.4× 135 1.4× 50 1.3k

Countries citing papers authored by Ursula Ptok

Since Specialization
Citations

This map shows the geographic impact of Ursula Ptok'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 Ursula Ptok with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ursula Ptok more than expected).

Fields of papers citing papers by Ursula Ptok

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ursula Ptok. 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 Ursula Ptok. The network helps show where Ursula Ptok may publish in the future.

Co-authorship network of co-authors of Ursula Ptok

This figure shows the co-authorship network connecting the top 25 collaborators of Ursula Ptok. A scholar is included among the top collaborators of Ursula Ptok 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 Ursula Ptok. Ursula Ptok 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.
Heun, Reinhard, Ursula Ptok, Heike Kölsch, Wolfgang Maier, & Frank Jessen. (2004). Contribution of Apolipoprotein E and Cathepsin D Genotypes to the Familial Aggregation of Alzheimer’s Disease. Dementia and Geriatric Cognitive Disorders. 18(2). 151–158. 5 indexed citations
2.
Kölsch, Heike, Ursula Ptok, Michael Majores, et al.. (2004). Putative association of polymorphism in the mannose 6-phosphate receptor gene with major depression and Alzheimer's disease. Psychiatric Genetics. 14(2). 97–100. 10 indexed citations
3.
Brune, Sebastian, Ursula Ptok, Michael Majores, et al.. (2003). Polymorphism in the peroxisome proliferator-activated receptor ? gene influences the risk for Alzheimer?s disease. Journal of Neural Transmission. 110(9). 1041–1050. 39 indexed citations
4.
Heun, Reinhard, Martin Kockler, & Ursula Ptok. (2003). Subjective Memory Complaints of Family Members of Patients with Alzheimer’s Disease and Depression. Dementia and Geriatric Cognitive Disorders. 16(2). 78–83. 9 indexed citations
5.
Kölsch, Heike, et al.. (2003). Association of the C766T polymorphism of the low‐density lipoprotein receptor‐related protein gene with Alzheimer's disease. American Journal of Medical Genetics Part B Neuropsychiatric Genetics. 121B(1). 128–130. 33 indexed citations
6.
Barkow, Katrin, et al.. (2003). Lifetime depressive and somatic symptoms as preclinical markers of late-onset depression. European Archives of Psychiatry and Clinical Neuroscience. 253(1). 16–21. 33 indexed citations
7.
Kockler, Martin, et al.. (2003). Lifetime symptoms of depression in Alzheimer's disease. European Psychiatry. 18(2). 63–69. 17 indexed citations
8.
Bagli, Metin, Andreas Papassotiropoulos, Ursula Ptok, et al.. (2003). Polymorphisms of the gene encoding the inflammatory cytokine interleukin-6 determine the magnitude of the increase in soluble interleukin-6 receptor levels in Alzheimer's disease. European Archives of Psychiatry and Clinical Neuroscience. 253(1). 44–48. 22 indexed citations
9.
Heun, Reinhard, Martin Kockler, & Ursula Ptok. (2002). Depression in Alzheimer’s disease: is there a temporal relationship between the onset of depression and the onset of dementia?. European Psychiatry. 17(5). 254–258. 38 indexed citations
10.
Kockler, Martin, et al.. (2002). Physical disorders and causes of death in relatives of Alzheimer's disease patients. International Journal of Geriatric Psychiatry. 17(4). 335–342. 2 indexed citations
11.
Ptok, Ursula, Katrin Barkow, & Reinhard Heun. (2002). Fertility and number of children in patients with Alzheimer's disease. Archives of Women s Mental Health. 5(2). 83–86. 63 indexed citations
12.
Heun, Reinhard, Martin Kockler, & Ursula Ptok. (2002). Psychiatric disorders in relatives of subjects with Alzheimer's disease. European Archives of Psychiatry and Clinical Neuroscience. 252(2). 93–97. 3 indexed citations
13.
Sutter, A.-L., et al.. (2002). Identification of a single nucleotide polymorphism in the choline acetyltransferase gene associated with Alzheimer's disease. Neuroscience Letters. 333(1). 9–12. 31 indexed citations
14.
Kölsch, Heike, Dieter Lütjohann, Michael Ludwig, et al.. (2002). Polymorphism in the cholesterol 24S-hydroxylase gene is associated with Alzheimer's disease. Molecular Psychiatry. 7(8). 899–902. 115 indexed citations
15.
Majores, Michael, Heike Kölsch, M. Bagli, et al.. (2002). The insulin gene VNTR polymorphism in Alzheimer's disease: results of a pilot study. Journal of Neural Transmission. 109(7-8). 1029–1034. 10 indexed citations
16.
Papassotiropoulos, Andreas, Dieter Lütjohann, M. Bagli, et al.. (2002). 24S-hydroxycholesterol in cerebrospinal fluid is elevated in early stages of dementia. Journal of Psychiatric Research. 36(1). 27–32. 192 indexed citations
17.
Ptok, Ursula, Andreas Papassotiropoulos, W. Maier, & Reinhard Heun. (2001). Seasonal distribution of births in patients with Alzheimer’s disease and elderly depressive patients. European Psychiatry. 16(3). 157–161. 10 indexed citations
18.
Ptok, Ursula, Andreas Papassotiropoulos, Reinhard Heun, & Wolfgang Maier. (2000). Advanced Parental Age:. International Psychogeriatrics. 12(4). 445–451. 12 indexed citations
19.
Heun, Reinhard, Andreas Papassotiropoulos, & Ursula Ptok. (2000). Subthreshold depressive and anxiety disorders in the elderly. European Psychiatry. 15(3). 173–182. 70 indexed citations
20.
Ptok, Ursula & Horst Dilling. (1999). The psychiatrists Oscar Wattenberg and Johannes Enge and the history of psychiatry in the Hanseatic City of Lübeck between 1900 and 1945. History of Psychiatry. 10(39). 319–328. 1 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.

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