World's Best Scientists 2026 revealed!
Brian E. Leonard

Brian E. Leonard

D-Index & Metrics

Medicine

D-Index
82
Citations
26156
World Ranking
16055
National Ranking
44

Brian E. Leonard publication distribution in Medicine in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Medicine in 2026. The highlighted bar marks where Brian E. Leonard sits on this spectrum.

101–120 publications: 5 scientists 121–140 publications: 26 scientists 141–160 publications: 73 scientists 161–180 publications: 155 scientists 181–200 publications: 230 scientists 201–220 publications: 363 scientists 221–240 publications: 487 scientists 241–260 publications: 545 scientists 261–280 publications: 722 scientists 281–300 publications: 768 scientists 301–320 publications: 834 scientists 321–340 publications: 895 scientists 341–360 publications: 922 scientists 361–380 publications: 838 scientists 381–400 publications: 861 scientists 401–420 publications: 918 scientists 421–440 publications: 806 scientists 441–460 publications: 771 scientists 461–480 publications: 751 scientists 481–500 publications: 713 scientists 501–520 publications: 617 scientists 521–540 publications: 611 scientists 541–560 publications: 537 scientists 561–580 publications: 504 scientists 581–600 publications: 509 scientists 601–620 publications: 396 scientists 621–640 publications: 386 scientists 641–660 publications: 371 scientists 661–680 publications: 340 scientists 681–700 publications: 336 scientists 701–720 publications: 307 scientists 721–740 publications: 259 scientists 741–760 publications: 230 scientists 761–780 publications: 228 scientists 781–800 publications: 217 scientists 801–820 publications: 204 scientists 821–840 publications: 186 scientists 841–860 publications: 177 scientists 861–880 publications: 155 scientists 881–900 publications: 139 scientists 901–920 publications: 145 scientists 921–940 publications: 116 scientists 941–960 publications: 133 scientists 961–980 publications: 91 scientists 981–1,000 publications: 96 scientists 1,001–1,020 publications: 77 scientists 1,021–1,040 publications: 70 scientists 1,041–1,060 publications: 63 scientists 1,061–1,080 publications: 77 scientists 1,081–1,100 publications: 49 scientists 1,101–1,120 publications: 54 scientists 1,121–1,140 publications: 49 scientists 1,141–1,160 publications: 51 scientists 1,161–1,180 publications: 35 scientists 1,181–1,200 publications: 39 scientists 1,201–1,220 publications: 26 scientists 1,221–1,240 publications: 37 scientists 1,241–1,260 publications: 36 scientists 1,261–1,280 publications: 27 scientists 1,281–1,300 publications: 32 scientists 1,301–1,320 publications: 28 scientists 1,321–1,340 publications: 17 scientists 1,341–1,360 publications: 30 scientists 1,361–1,380 publications: 28 scientists 1,381–1,400 publications: 17 scientists 1,401–1,420 publications: 21 scientists 1,421–1,440 publications: 15 scientists 1,441–1,460 publications: 12 scientists 1,461–1,480 publications: 12 scientists 1,481–1,500 publications: 18 scientists 1,501–1,520 publications: 14 scientists 1,521–1,540 publications: 17 scientists 1,541–1,560 publications: 15 scientists 1,561–1,580 publications: 6 scientists 1,581–1,600 publications: 2 scientists 1,601–1,620 publications: 12 scientists 1,621–1,640 publications: 11 scientists 1,641–1,660 publications: 8 scientists 1,661–1,680 publications: 5 scientists 1,681–1,700 publications: 5 scientists 1,701–1,720 publications: 10 scientists 1,721–1,740 publications: 12 scientists 1,741–1,760 publications: 14 scientists 1,761–1,780 publications: 6 scientists 1,781–1,795 publications: 5 scientists 1,796+ publications: 100 scientists
101 publications 1,796+

This scientist: 746 publications — 84th percentile

84% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,796 publications or more.

Brian E. Leonard D-index placement in Medicine in 2026

The chart shows the D-index (discipline H-index) distribution of Medicine scientists ranked by Research.com in 2026. The highlighted bar marks where Brian E. Leonard sits on this spectrum.

70–71 D-Index: 226 scientists 72–73 D-Index: 391 scientists 74–75 D-Index: 574 scientists 76–77 D-Index: 730 scientists 78–79 D-Index: 891 scientists 80–81 D-Index: 972 scientists 82–83 D-Index: 1,027 scientists 84–85 D-Index: 1,003 scientists 86–87 D-Index: 960 scientists 88–89 D-Index: 970 scientists 90–91 D-Index: 922 scientists 92–93 D-Index: 839 scientists 94–95 D-Index: 808 scientists 96–97 D-Index: 779 scientists 98–99 D-Index: 668 scientists 100–101 D-Index: 611 scientists 102–103 D-Index: 630 scientists 104–105 D-Index: 513 scientists 106–107 D-Index: 541 scientists 108–109 D-Index: 445 scientists 110–111 D-Index: 429 scientists 112–113 D-Index: 400 scientists 114–115 D-Index: 393 scientists 116–117 D-Index: 318 scientists 118–119 D-Index: 302 scientists 120–121 D-Index: 287 scientists 122–123 D-Index: 255 scientists 124–125 D-Index: 256 scientists 126–127 D-Index: 252 scientists 128–129 D-Index: 230 scientists 130–131 D-Index: 179 scientists 132–133 D-Index: 168 scientists 134–135 D-Index: 163 scientists 136–137 D-Index: 159 scientists 138–139 D-Index: 134 scientists 140–141 D-Index: 134 scientists 142–143 D-Index: 118 scientists 144–145 D-Index: 109 scientists 146–147 D-Index: 106 scientists 148–149 D-Index: 74 scientists 150–151 D-Index: 79 scientists 152–153 D-Index: 80 scientists 154–155 D-Index: 87 scientists 156–157 D-Index: 57 scientists 158–159 D-Index: 74 scientists 160–161 D-Index: 69 scientists 162–163 D-Index: 60 scientists 164–165 D-Index: 53 scientists 166–167 D-Index: 39 scientists 168–169 D-Index: 42 scientists 170–171 D-Index: 32 scientists 172–173 D-Index: 39 scientists 174–175 D-Index: 40 scientists 176–177 D-Index: 28 scientists 178–179 D-Index: 19 scientists 180–181 D-Index: 23 scientists 182–183 D-Index: 31 scientists 184–185 D-Index: 18 scientists 186–187 D-Index: 20 scientists 188–189 D-Index: 22 scientists 190–191 D-Index: 13 scientists 192–193 D-Index: 21 scientists 194–195 D-Index: 12 scientists 196–197 D-Index: 12 scientists 198–199 D-Index: 14 scientists 200–201 D-Index: 15 scientists 202–203 D-Index: 13 scientists 204–205 D-Index: 10 scientists 206–207 D-Index: 8 scientists 208–209 D-Index: 4 scientists 210–211 D-Index: 12 scientists 212–213 D-Index: 11 scientists 214–215 D-Index: 10 scientists 216 D-Index: 4 scientists 217+ D-Index: 98 scientists
70 D-Index 217+

This scientist: 82 D-Index — 21st percentile

21% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 217 D-Index or more.

Research.com Recognitions

  • 1983 - Member of the Royal Irish Academy

Overview

Brian E. Leonard is affiliated with the National University of Ireland, Galway, located in Ireland. Their research spans several interconnected fields within the social sciences, agricultural and biological sciences, and economics, econometrics, and finance.

Their recent publication is titled Toward a broader understanding of boomerang effects: The negative unintended consequences of poverty alleviation programs, published in 2025 in the AMS Review.

Leonard's work addresses topics such as:

  • Income, Poverty, and Inequality
  • Agricultural risk and resilience
  • Microfinance and Financial Inclusion

Their main fields of study include:

  • Social Sciences
  • Agricultural and Biological Sciences
  • Economics, Econometrics and Finance

Within these fields, they focus on subfields such as:

  • Sociology and Political Science
  • Soil Science
  • Economics and Econometrics

Leonard has collaborated frequently with several coauthors, including:

  • Robert Alfonso Arias
  • Iina Ikonen
  • Kristin Scott
  • Stephen Juma
  • Anne Faber

Their publications have appeared predominantly in the AMS Review.

Leonard was honored as a Member of the Royal Irish Academy in 1983, reflecting a recognized standing within the academic community.

Best Publications

  • The olfactory bulbectomised rat as a model of depression

    Cai Song;Brian E. Leonard

  • The olfactory bulbectomized rat as a model of depression: An update

    J.P. Kelly;A.S. Wrynn;B.E. Leonard

  • The new '5-HT' hypothesis of depression: cell-mediated immune activation induces indoleamine 2,3-dioxygenase, which leads to lower plasma tryptophan and an increased synthesis of detrimental tryptophan catabolites (TRYCATs), both of which contribute to the onset of depression.

    M. Maes;B.E. Leonard;A.M. Myint;M. Kubera

  • Mechanistic explanations how cell-mediated immune activation, inflammation and oxidative and nitrosative stress pathways and their sequels and concomitants play a role in the pathophysiology of unipolar depression.

    Brian Leonard;Michael Maes

  • Depression and sickness behavior are Janus-faced responses to shared inflammatory pathways

    Michael Maes;Michael Berk;Lisa Goehler;Cai Song

  • The role of pro-inflammatory cytokines in neuroinflammation, neurogenesis and the neuroendocrine system in major depression.

    Yong Ku Kim;Kyoung Sae Na;Aye Mu Myint;Brian E. Leonard

  • Depression, stress and immunological activation: the role of cytokines in depressive disorders.

    Thomas J. Connor;Brian E. Leonard

  • Th1, Th2, and Th3 cytokine alterations in major depression.

    Aye Mu Myint;Brian E. Leonard;Harry W.M. Steinbusch;Yong Ku Kim

  • The immune system, depression and the action of antidepressants.

    Brian E. Leonard

  • Inflammation, depression and dementia: are they connected?

    Brian E. Leonard;Brian E. Leonard

  • Association of high-sensitivity C-reactive protein with de novo major depression

    Julie A. Pasco;Geoffrey C. Nicholson;Lana J. Williams;Felice N. Jacka

  • A review of the role of serotonin receptors in psychiatric disorders.

    Marie Naughton;Jane B. Mulrooney;Brian E. Leonard

  • The Concept of Depression as a Dysfunction of the Immune System

    Brian E. Leonard

  • Effects of psychotropic drugs on the behavior and neurochemistry of olfactory bulbectomized rats.

    H. van Riezen;B.E. Leonard

  • Methylphenidate: a review of its neuropharmacological, neuropsychological and adverse clinical effects.

    Brian E. Leonard;Denise McCartan;John White;David J. King

  • An assessment of the effects of central interleukin-1β, -2, -6, and tumor necrosis factor-α administration on some behavioural, neurochemical, endocrine and immune parameters in the rat

    T.J Connor;C Song;B.E Leonard;Z Merali

  • The role of noradrenaline and selective noradrenaline reuptake inhibition in depression

    Nicoletta Brunello;Julien Mendlewicz;Siegfried Kasper;Brian Leonard

  • The psychoneuroimmunology of depression.

    Brian E. Leonard;Brian E. Leonard;Ayemu Myint

  • HPA and immune axes in stress: involvement of the serotonergic system.

    Brian E. Leonard

  • Research report Kynurenine pathway in major depression: Evidence of impaired neuroprotection

    Aye-Mu Myint;Yong Ku Kim;Robert Verkerk;Simon Scharpé

Frequent Co-Authors

Andrew Harkin
Andrew Harkin Trinity College Dublin
Harry W.M. Steinbusch
Harry W.M. Steinbusch Maastricht University
Aye-Mu Myint
Aye-Mu Myint Ludwig-Maximilians-Universität München
John Kelly
John Kelly University College London
John F. Cryan
John F. Cryan University College Cork
Siegfried Kasper
Siegfried Kasper Medical University of Vienna
Michael Berk
Michael Berk Deakin University
David S. Baldwin
David S. Baldwin University of Southampton
Trevor R. Norman
Trevor R. Norman University of Melbourne
Julien Mendlewicz
Julien Mendlewicz Université Libre de Bruxelles

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