World's Best Scientists 2026 revealed!

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Neuroscience 135 233 208 31 29 804 70059
Medicine 136 1973 1838 205 197 807 71046

Roger A. Barker publications per year

The chart shows the history of publications by Roger A. Barker between 1951 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Roger A. Barker published across 75 years, from 1951 to 2025, averaging 12.2 papers a year. Output peaked at 54 publications in 2016. 75 of the 915 publications appeared in the last two years.

No. of publications
10 20 30 40 50
Bar chart. Horizontal axis: year, 1951 to 2025. Vertical axis: number of publications, 0 to 54. Peak 54 publications in 2016. 1951: 1 publication 1952: 0 publications 1953: 0 publications 1954: 0 publications 1955: 0 publications 1956: 0 publications 1957: 0 publications 1958: 0 publications 1959: 0 publications 1960: 0 publications 1961: 0 publications 1962: 0 publications 1963: 0 publications 1964: 0 publications 1965: 0 publications 1966: 0 publications 1967: 0 publications 1968: 0 publications 1969: 0 publications 1970: 0 publications 1971: 0 publications 1972: 0 publications 1973: 0 publications 1974: 0 publications 1975: 0 publications 1976: 0 publications 1977: 0 publications 1978: 0 publications 1979: 0 publications 1980: 0 publications 1981: 0 publications 1982: 0 publications 1983: 0 publications 1984: 0 publications 1985: 1 publication 1986: 0 publications 1987: 0 publications 1988: 3 publications 1989: 4 publications 1990: 2 publications 1991: 1 publication 1992: 0 publications 1993: 4 publications 1994: 3 publications 1995: 9 publications 1996: 14 publications 1997: 7 publications 1998: 10 publications 1999: 9 publications 2000: 15 publications 2001: 16 publications 2002: 10 publications 2003: 19 publications 2004: 21 publications 2005: 19 publications 2006: 27 publications 2007: 19 publications 2008: 22 publications 2009: 33 publications 2010: 38 publications 2011: 31 publications 2012: 37 publications 2013: 45 publications 2014: 47 publications 2015: 42 publications 2016: 54 publications 2017: 39 publications 2018: 43 publications 2019: 31 publications 2020: 54 publications 2021: 52 publications 2022: 33 publications 2023: 25 publications 2024: 42 publications 2025: 33 publications
1951 2025

915 publications in total across all disciplines

View publications per year as a table
Roger A. Barker: publications per year, 1951 to 2025
Year Publications
1951 1
1952 0
1953 0
1954 0
1955 0
1956 0
1957 0
1958 0
1959 0
1960 0
1961 0
1962 0
1963 0
1964 0
1965 0
1966 0
1967 0
1968 0
1969 0
1970 0
1971 0
1972 0
1973 0
1974 0
1975 0
1976 0
1977 0
1978 0
1979 0
1980 0
1981 0
1982 0
1983 0
1984 0
1985 1
1986 0
1987 0
1988 3
1989 4
1990 2
1991 1
1992 0
1993 4
1994 3
1995 9
1996 14
1997 7
1998 10
1999 9
2000 15
2001 16
2002 10
2003 19
2004 21
2005 19
2006 27
2007 19
2008 22
2009 33
2010 38
2011 31
2012 37
2013 45
2014 47
2015 42
2016 54
2017 39
2018 43
2019 31
2020 54
2021 52
2022 33
2023 25
2024 42
2025 33
Total 915
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Roger A. Barker publication distribution in Neuroscience in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Neuroscience in 2026. The highlighted bar marks where Roger A. Barker sits on this spectrum.

No. of scientists
100 200 300 400 500
Bar chart with 86 bars. Horizontal axis: publications, 38–47 to 887+. Vertical axis: number of scientists, 0 to 539. Most scientists, 539, have 98–107 publications. The last bar groups every scientist with 887 publications or more. The highlighted bar, 798–807 publications, is where this scientist sits. 38–47 publications: 18 scientists 48–57 publications: 79 scientists 58–67 publications: 193 scientists 68–77 publications: 323 scientists 78–87 publications: 406 scientists 88–97 publications: 452 scientists 98–107 publications: 539 scientists 108–117 publications: 505 scientists 118–127 publications: 522 scientists 128–137 publications: 469 scientists 138–147 publications: 456 scientists 148–157 publications: 459 scientists 158–167 publications: 397 scientists 168–177 publications: 383 scientists 178–187 publications: 350 scientists 188–197 publications: 302 scientists 198–207 publications: 306 scientists 208–217 publications: 262 scientists 218–227 publications: 242 scientists 228–237 publications: 220 scientists 238–247 publications: 203 scientists 248–257 publications: 174 scientists 258–267 publications: 176 scientists 268–277 publications: 175 scientists 278–287 publications: 125 scientists 288–297 publications: 116 scientists 298–307 publications: 127 scientists 308–317 publications: 128 scientists 318–327 publications: 99 scientists 328–337 publications: 89 scientists 338–347 publications: 78 scientists 348–357 publications: 96 scientists 358–367 publications: 66 scientists 368–377 publications: 59 scientists 378–387 publications: 65 scientists 388–397 publications: 54 scientists 398–407 publications: 48 scientists 408–417 publications: 49 scientists 418–427 publications: 34 scientists 428–437 publications: 31 scientists 438–447 publications: 30 scientists 448–457 publications: 31 scientists 458–467 publications: 36 scientists 468–477 publications: 40 scientists 478–487 publications: 35 scientists 488–497 publications: 30 scientists 498–507 publications: 23 scientists 508–517 publications: 26 scientists 518–527 publications: 20 scientists 528–537 publications: 23 scientists 538–547 publications: 20 scientists 548–557 publications: 20 scientists 558–567 publications: 17 scientists 568–577 publications: 14 scientists 578–587 publications: 20 scientists 588–597 publications: 20 scientists 598–607 publications: 19 scientists 608–617 publications: 18 scientists 618–627 publications: 17 scientists 628–637 publications: 11 scientists 638–647 publications: 11 scientists 648–657 publications: 11 scientists 658–667 publications: 8 scientists 668–677 publications: 7 scientists 678–687 publications: 11 scientists 688–697 publications: 10 scientists 698–707 publications: 4 scientists 708–717 publications: 6 scientists 718–727 publications: 5 scientists 728–737 publications: 5 scientists 738–747 publications: 9 scientists 748–757 publications: 9 scientists 758–767 publications: 3 scientists 768–777 publications: 7 scientists 778–787 publications: 7 scientists 788–797 publications: 6 scientists 798–807 publications: 2 scientists 808–817 publications: 2 scientists 818–827 publications: 7 scientists 828–837 publications: 0 scientists 838–847 publications: 9 scientists 848–857 publications: 3 scientists 858–867 publications: 1 scientist 868–877 publications: 3 scientists 878–886 publications: 6 scientists 887+ publications: 100 scientists
38–47 publications 887+

This scientist: 804 publications — 99th percentile

99% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 887 publications or more.

View publications distribution as a table
Number of Neuroscience scientists by publication count, Research.com 2026 ranking edition. Based on 9,597 ranked scientists.
Publications Scientists This scientist
38–47 18
48–57 79
58–67 193
68–77 323
78–87 406
88–97 452
98–107 539
108–117 505
118–127 522
128–137 469
138–147 456
148–157 459
158–167 397
168–177 383
178–187 350
188–197 302
198–207 306
208–217 262
218–227 242
228–237 220
238–247 203
248–257 174
258–267 176
268–277 175
278–287 125
288–297 116
298–307 127
308–317 128
318–327 99
328–337 89
338–347 78
348–357 96
358–367 66
368–377 59
378–387 65
388–397 54
398–407 48
408–417 49
418–427 34
428–437 31
438–447 30
448–457 31
458–467 36
468–477 40
478–487 35
488–497 30
498–507 23
508–517 26
518–527 20
528–537 23
538–547 20
548–557 20
558–567 17
568–577 14
578–587 20
588–597 20
598–607 19
608–617 18
618–627 17
628–637 11
638–647 11
648–657 11
658–667 8
668–677 7
678–687 11
688–697 10
698–707 4
708–717 6
718–727 5
728–737 5
738–747 9
748–757 9
758–767 3
768–777 7
778–787 7
788–797 6
798–807 2 804
808–817 2
818–827 7
828–837 0
838–847 9
848–857 3
858–867 1
868–877 3
878–886 6
887+ 100
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Roger A. Barker D-index placement in Neuroscience in 2026

The chart shows the D-index (discipline H-index) distribution of Neuroscience scientists ranked by Research.com in 2026. The highlighted bar marks where Roger A. Barker sits on this spectrum.

No. of scientists
100 200 300 400 500
Bar chart with 68 bars. Horizontal axis: D-Index, 30–31 to 163+. Vertical axis: number of scientists, 0 to 512. Most scientists, 512, have 46–47 D-Index. The last bar groups every scientist with 163 D-Index or more. The highlighted bar, 134–135 D-Index, is where this scientist sits. 30–31 D-Index: 42 scientists 32–33 D-Index: 172 scientists 34–35 D-Index: 296 scientists 36–37 D-Index: 435 scientists 38–39 D-Index: 459 scientists 40–41 D-Index: 456 scientists 42–43 D-Index: 467 scientists 44–45 D-Index: 478 scientists 46–47 D-Index: 512 scientists 48–49 D-Index: 435 scientists 50–51 D-Index: 425 scientists 52–53 D-Index: 418 scientists 54–55 D-Index: 392 scientists 56–57 D-Index: 357 scientists 58–59 D-Index: 334 scientists 60–61 D-Index: 328 scientists 62–63 D-Index: 260 scientists 64–65 D-Index: 278 scientists 66–67 D-Index: 239 scientists 68–69 D-Index: 250 scientists 70–71 D-Index: 210 scientists 72–73 D-Index: 200 scientists 74–75 D-Index: 189 scientists 76–77 D-Index: 170 scientists 78–79 D-Index: 146 scientists 80–81 D-Index: 113 scientists 82–83 D-Index: 126 scientists 84–85 D-Index: 100 scientists 86–87 D-Index: 84 scientists 88–89 D-Index: 99 scientists 90–91 D-Index: 84 scientists 92–93 D-Index: 85 scientists 94–95 D-Index: 72 scientists 96–97 D-Index: 76 scientists 98–99 D-Index: 45 scientists 100–101 D-Index: 49 scientists 102–103 D-Index: 43 scientists 104–105 D-Index: 32 scientists 106–107 D-Index: 45 scientists 108–109 D-Index: 50 scientists 110–111 D-Index: 32 scientists 112–113 D-Index: 39 scientists 114–115 D-Index: 32 scientists 116–117 D-Index: 29 scientists 118–119 D-Index: 27 scientists 120–121 D-Index: 19 scientists 122–123 D-Index: 23 scientists 124–125 D-Index: 27 scientists 126–127 D-Index: 16 scientists 128–129 D-Index: 24 scientists 130–131 D-Index: 13 scientists 132–133 D-Index: 21 scientists 134–135 D-Index: 17 scientists 136–137 D-Index: 14 scientists 138–139 D-Index: 15 scientists 140–141 D-Index: 10 scientists 142–143 D-Index: 10 scientists 144–145 D-Index: 13 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 8 scientists 150–151 D-Index: 6 scientists 152–153 D-Index: 6 scientists 154–155 D-Index: 7 scientists 156–157 D-Index: 7 scientists 158–159 D-Index: 10 scientists 160–161 D-Index: 4 scientists 162 D-Index: 8 scientists 163+ D-Index: 100 scientists
30–31 D-Index 163+

This scientist: 135 D-Index — 98th percentile

98% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 163 D-Index or more.

View D-Index distribution as a table
Number of Neuroscience scientists by D-index, Research.com 2026 ranking edition. Based on 9,597 ranked scientists.
D-Index Scientists This scientist
30–31 42
32–33 172
34–35 296
36–37 435
38–39 459
40–41 456
42–43 467
44–45 478
46–47 512
48–49 435
50–51 425
52–53 418
54–55 392
56–57 357
58–59 334
60–61 328
62–63 260
64–65 278
66–67 239
68–69 250
70–71 210
72–73 200
74–75 189
76–77 170
78–79 146
80–81 113
82–83 126
84–85 100
86–87 84
88–89 99
90–91 84
92–93 85
94–95 72
96–97 76
98–99 45
100–101 49
102–103 43
104–105 32
106–107 45
108–109 50
110–111 32
112–113 39
114–115 32
116–117 29
118–119 27
120–121 19
122–123 23
124–125 27
126–127 16
128–129 24
130–131 13
132–133 21
134–135 17 135
136–137 14
138–139 15
140–141 10
142–143 10
144–145 13
146–147 9
148–149 8
150–151 6
152–153 6
154–155 7
156–157 7
158–159 10
160–161 4
162 8
163+ 100
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Overview

Roger A. Barker is affiliated with the University of Cambridge in the United Kingdom. Their research spans multiple disciplines within biomedical sciences, focusing notably on medicine, biochemistry, genetics, molecular biology, and neuroscience.

The scientist's publication record demonstrates significant engagement in neurology and molecular biology, with a considerable number of works contributing to cellular and molecular neuroscience, cognitive neuroscience, and physiology.

Research topics covered by Barker include Parkinson's disease mechanisms and treatments, neurological disorders and treatments, genetic neurodegenerative diseases, pluripotent stem cells, single-cell and spatial transcriptomics, mitochondrial function and pathology, as well as autism spectrum disorder research.

Frequent collaborators include Caroline H. Williams-Gray, Xiaoling He, Omer Ali Bayraktar, Sarah A. Teichmann, and Thomas Foltynie.

Typical venues for their research publications are:

  • bioRxiv (Cold Spring Harbor Laboratory)
  • Movement Disorders
  • Journal of Parkinson s Disease
  • Journal of Neurology
  • Nature

Notable recent papers include:

  • A cell atlas of human thymic development defines T cell repertoire formation, 2020, Science
  • Cells of the human intestinal tract mapped across space and time, 2021, Nature
  • ISSCR Guidelines for Stem Cell Research and Clinical Translation: The 2021 update, 2021, Stem Cell Reports
  • Comprehensive cell atlas of the first-trimester developing human brain, 2023, Science
  • Diagnostic criteria for mild cognitive impairment in Parkinson's disease: Movement Disorder Society Task Force guidelines, 2020, UNC Libraries

Barker's scholarly contributions include extensive work on Parkinson's disease mechanisms and treatments, reflecting a specialized commitment to understanding this condition alongside broader interests in neurological disorders.

Their multidisciplinary approach integrates cellular and molecular methods with clinical neuroscience, supporting developments in genetic neurodegenerative disease research as well as stem cell biology and transcriptomics.

This breadth of focus aligns with publication trends evident in highly regarded scientific journals, which serve as platforms for disseminating research findings across medical and molecular biology communities.

Best Publications

  • RNA velocity of single cells

    Gioele La Manno;Gioele La Manno;Ruslan Soldatov;Amit Zeisel;Amit Zeisel;Emelie Braun;Emelie Braun

  • Diagnostic Criteria for Mild Cognitive Impairment in Parkinson’s Disease: Movement Disorder Society Task Force Guidelines

    Irene Litvan;Jennifer G. Goldman;Alexander I. Tröster;Ben A. Schmand

  • A Functional Role for Adult Hippocampal Neurogenesis in Spatial Pattern Separation

    C. D. Clelland;M. Choi;C. Romberg;G. D. Clemenson

  • Evolution of cognitive dysfunction in an incident Parkinson's disease cohort

    C. H. Williams-Gray;T. Foltynie;C. E. G. Brayne;T. W. Robbins

  • The distinct cognitive syndromes of Parkinson's disease: 5 year follow-up of the CamPaIGN cohort

    Caroline H. Williams-Gray;Jonathan R. Evans;An Goris;An Goris;Thomas Foltynie

  • Enhanced or Impaired Cognitive Function in Parkinson's Disease as a Function of Dopaminergic Medication and Task Demands

    Roshan Cools;Roger A. Barker;Barbara J. Sahakian;Trevor W. Robbins

  • Neuropsychological and clinical heterogeneity of cognitive impairment and dementia in patients with Parkinson's disease

    Angie A Kehagia;Roger A Barker;Trevor W Robbins

  • Mild cognitive impairment in Parkinson disease: a multicenter pooled analysis.

    D. Aarsland;K. Bronnick;C. Williams-Gray;D. Weintraub

  • The cognitive ability of an incident cohort of Parkinson's patients in the UK. The CamPaIGN study

    Thomas Foltynie;Carol E. G. Brayne;Trevor W. Robbins;Roger A. Barker

  • Molecular Diversity of Midbrain Development in Mouse, Human, and Stem Cells

    Gioele La Manno;Gioele La Manno;Daniel Gyllborg;Simone Codeluppi;Simone Codeluppi;Kaneyasu Nishimura

  • A cell atlas of human thymic development defines T cell repertoire formation.

    Jong-Eun Park;Rachel A. Botting;Cecilia Domínguez Conde;Dorin-Mirel Popescu

  • The CamPaIGN study of Parkinson's disease: 10-year outlook in an incident population-based cohort

    Caroline H Williams-Gray;Sarah L Mason;Jonathan R Evans;Thomas Foltynie

  • Heterogeneity of Parkinson’s disease in the early clinical stages using a data driven approach

    S J G Lewis;T Foltynie;A D Blackwell;T W Robbins

  • Cognitive impairments in early Parkinson's disease are accompanied by reductions in activity in frontostriatal neural circuitry.

    Simon J. G. Lewis;Anja Dove;Trevor W. Robbins;Roger A. Barker

  • Cognitive impairment in Parkinson's disease: the dual syndrome hypothesis.

    Angie A. Kehagia;Roger A. Barker;Trevor W. Robbins

  • Cells of the human intestinal tract mapped across space and time.

    Rasa Elmentaite;Natsuhiko Kumasaka;Kenny Roberts;Aaron Fleming

  • l-Dopa medication remediates cognitive inflexibility, but increases impulsivity in patients with Parkinson’s disease

    Roshan Cools;Roger A Barker;Barbara J Sahakian;Trevor W Robbins

  • The spectrum of nonmotor symptoms in early Parkinson disease

    Tien Kheng Khoo;Alison J Yarnall;Gordon W Duncan;Shirley Coleman

  • Microglial activation correlates with severity in Huntington disease A clinical and PET study

    N. Pavese;A. Gerhard;Y. F. Tai;A. K. Ho

  • Long-term safety and tolerability of ProSavin, a lentiviral vector-based gene therapy for Parkinson's disease: a dose escalation, open-label, phase 1/2 trial

    Stéphane Palfi;Jean Marc Gurruchaga;G Scott Ralph;Helene Lepetit

  • Mechanisms of cognitive set flexibility in Parkinson's disease.

    Roshan Cools;Roger A. Barker;Barbara J. Sahakian;Trevor W. Robbins

  • Dopaminergic modulation of high‐level cognition in Parkinson’s disease: the role of the prefrontal cortex revealed by PET

    Roshan Cools;Elka Stefanova;Roger A. Barker;Trevor W. Robbins

Frequent Co-Authors

Thomas Foltynie
Thomas Foltynie University College London
David J. Burn
David J. Burn Newcastle University
James B. Rowe
James B. Rowe University of Cambridge
Trevor W. Robbins
Trevor W. Robbins University of Cambridge
Stephen B. Dunnett
Stephen B. Dunnett Cardiff University
Anne Elizabeth Rosser
Anne Elizabeth Rosser Cardiff University
Adrian M. Owen
Adrian M. Owen University of Western Ontario
David J. Brooks
David J. Brooks Newcastle University
Nicholas W. Wood
Nicholas W. Wood University College London
Paola Piccini
Paola Piccini Imperial College London

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