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Topic · Cognitive Neuroscience

Hallucinations in medical conditions

Hallucinations in medical conditions is a research topic within Cognitive Neuroscience. Science Explorer counts 3.9k research works in it since 1950. 10.6% of them reached the world's top 10% most cited for their field and year.

This cluster of papers explores visual hallucinatory syndromes, including Charles Bonnet Syndrome, musical hallucinosis, and auditory hallucinations, in the context of visual impairment and retinal diseases. It delves into the neural basis, brain substrate, clinical spectrum, prevalence, phenomenology, and treatment options for these complex visual and musical hallucinations.

  • Visual Hallucinations
  • Charles Bonnet Syndrome
  • Musical Hallucinations
  • Neural Basis
  • Brain Substrate
  • Auditory Hallucinations
  • Retinal Disease
  • Ophthalmology
  • Neuroimaging Studies
  • Rehabilitation
Research works
3.9k
fractional, since 1950
In the world top 10%
417
per year above
Top-10% rate
10.6%
share of its works in the world top 10%
Growth, 2018-21 → 2022-25
+21%
the tick is no change
Largest producer
United States
35% of the 10 largest, 2022-now
Hallucinations in medical conditions

Which countries lead Hallucinations in medical conditions research?

By volume, the United States and the United Kingdom publish the most (194 and 67 works in 2022-now).

By volume, 2022-now

  1. 1 United States 194 works
  2. 2 United Kingdom 67 works
  3. 3 India 56 works
  4. 4 China 48 works
  5. 5 Spain 44 works
  6. 6 Germany 43 works
  7. 7 Japan 30 works
  8. 8 Brazil 28 works
  9. 9 France 24 works
  10. 10 Australia 21 works

How concentrated that is

The same countries as shares of everything the list above accounts for. A node where two countries do two thirds of the work and one spread evenly across twelve read alike as a ranking and not at all alike here.

United States: 35.1%United Kingdom: 12.0%India: 10.0%China: 8.7%6 others listed: 34.1%35%largest
United States194 · 35.1%United Kingdom67 · 12.0%India56 · 10.0%China48 · 8.7%6 others listed189 · 34.1%

Shares of the rows listed above, not of the whole node.

Which institutions lead Hallucinations in medical conditions research?

By volume in 2022-now, CHDI Foundation publishes the most Hallucinations in medical conditions research, followed by Saarland University and Harvard University.

By volume, 2022-now

  1. 1 CHDI FoundationUnited States 9 works
  2. 2 Saarland UniversityGermany 6 works
  3. 3 Harvard UniversityUnited States 6 works
  4. 4 Centre National de la Recherche ScientifiqueFrance 5 works
  5. 5 University College LondonUnited Kingdom 5 works
  6. 6 Yale UniversityUnited States 5 works
  7. 7 All India Institute of Medical SciencesIndia 5 works
  8. 8 King's College LondonUnited Kingdom 4 works
  9. 9 Universidad Complutense de MadridSpain 4 works
  10. 10 Case Western Reserve UniversityUnited States 3 works

Who are the leading researchers in Hallucinations in medical conditions?

The most-cited researchers publishing on Hallucinations in medical conditions include Karl John Friston, Dan J. Stein and Josep María Haro.

  1. 1 Karl John Friston United Kingdom 310k citations
  2. 2 Dan J. Stein South Africa 306k citations
  3. 3 Josep María Haro Spain 250k citations
  4. 4 Trevor William Robbins United Kingdom 199k citations
  5. 5 Bruce Leonard Miller United States 196k citations

Ranked by citations received across their whole record, among researchers with at least three works on this topic.

What are the most cited papers in Hallucinations in medical conditions?

The most cited paper in Hallucinations in medical conditions is "Recommended diagnostic criteria for paraneoplastic neurological syndromes" (Francesc Graus, 2004), with 1,620 citations. Next come "Scales to measure dimensions of hallucinations and delusions: the psychotic symptom rating scales (PSYRATS)" (1,484) and "Hallucinations in Parkinson's disease: Prevalence, phenomenology and risk factors" (1,044).

Most cited papers
#PaperReleasedCitations
1 Recommended diagnostic criteria for paraneoplastic neurological syndromes Francesc Graus · Journal of Neurology Neurosurgery & Psychiatry Open access 16 Jul 2004 1,620
2 Scales to measure dimensions of hallucinations and delusions: the psychotic symptom rating scales (PSYRATS) Gillian Haddock, Joy McCarron, Nicholas Tarrier et al. · Psychological Medicine Jul 1999 1,484
3 Hallucinations in Parkinson's disease: Prevalence, phenomenology and risk factors Gilles Fénelon · Brain Apr 2000 1,044
4 Stimulating illusory own-body perceptions Olaf Blanke, Stphanie Ortigue, Théodor Landis et al. · Nature Open access Sep 2002 811
5 Activation of Heschl’s Gyrus during Auditory Hallucinations Thomas Dierks, David E.J. Linden, Martin Jandl et al. · Neuron Open access Mar 1999 763
All 100 most cited papers, with filters and sorting

Where is Hallucinations in medical conditions research done?

The largest centres of Hallucinations in medical conditions research in 2022-now are London (United Kingdom), New York (United States), Madrid (Spain) and Beijing (China). Among places with at least 20 works in it, it is an unusually large share of all research in London.

Largest cities, 2022-now

  1. 1 LondonUnited Kingdom 22 works
  2. 2 New YorkUnited States 20 works
  3. 3 MadridSpain 15 works
  4. 4 BeijingChina 10 works
  5. 5 MelbourneAustralia 8 works
  6. 6 TokyoJapan 8 works
  7. 7 BostonUnited States 8 works
  8. 8 ParisFrance 8 works
  9. 9 São PauloBrazil 7 works
  10. 10 SaarbrückenGermany 7 works

Where it is the local speciality

  1. LondonGB · 22.1 works3.1×
← less than its size predicts1×more →

Location quotient: how much more of its research is in Hallucinations in medical conditions than the world average.

See Hallucinations in medical conditions on the map

Is Hallucinations in medical conditions research growing?

Output in 2022-2025 was 21% higher than in 2018-2021, peaking in 2026. The fastest-growing topics are Hallucinations in medical conditions.

still counting19801990200020102020
grewheldshrank

The same series as a ribbon: one cell per year, darker for more. The line above answers how much; this answers when.

Its share of all research

Growing output can still be a shrinking share: all of science grows. This is Hallucinations in medical conditions as a percentage of every work published that year, 0.0025% in 2024.

still counting0.0025%0.0050%0.0075%Hallucinations in medical conditions0.0039% in 202519801990200020102020

Fractional works of Hallucinations in medical conditions over all fractional works that year. How the balance of science has shifted.

How much of it reaches the world top 10%

Year by year.

still counting5%10%15%Hallucinations in medical conditions9.9% in 2025200020102020

Of each year's works in it, the share that reached the world's 10% most cited for their field and year. A field is the world for its own topics, so there is no other line to hold it against.

Which topics inside it are moving

Growth and decline on one axis around a shared zero. Two lists side by side hide the thing that matters: whether the growth dwarfs the decline, or the other way round.

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