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Understanding visual hallucinations

Researchers are using brain scans and electrical recordings to compare people who experience hallucinations with those who do not.

Learning by observing or collecting information · Study reference: NL-OMON45084

Plain-language introduction written with AI from the registry; not independently checked by a clinician. Read the original details below ↓

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Start (reported date)
2013-12-07

Planned dates can move. A study finishing does not tell us when a paper will be published.

No results summary has been confirmed in the registry records we imported. See connected papers below; we keep checking after recruitment ends.

Changes we have recorded
  • 2026-10-11 — recruiting

These are dates we observed a change, not necessarily the dates it happened.

Papers connected to this study

No connected paper has been found yet. The tracker checks the growing library for study identifiers and registry-linked publications.

Who can join?

Ages 18 to 99 · Ask the team who can join

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Read all the rules for taking part

Sex eligibility reported by registry: Not reported

Inclusion criteria: - Previous participation in the phenomenology/cognition study 13-059. - Belong to one of the following diagnostic groups: 1.Patients with schizophrenia 2. Patients with Parkinson's disease 3. Patients with Lewy body dementia 4. Patients with Alzheimer's disease 5. Patients with hearing impairment 6.Patients with visual loss - Written informed consent Exclusion criteria: - < 18 years of age - Any contraindication for a 3Tesla MRI scan
Full study name & original research details

Official study title

Understanding Hallucinations (part II) - fMRI & EEG - Understanding Hallucinations 2

Short title used by the registry

Understanding Hallucinations (part II) - fMRI & EEG

Original description

Primary outcome: The main study endpoints are differences between hallucinating and non-hallucinating participants and between hallucinating individuals of different subtypes in: - resting state correlates as measured with fMRI, namely: connectivity within the DMN and connectivity of the DMN to sensory cortices and the hippocampal-amygdala complex. - EEG spectral analysis, synchronization likelihood, clustering index, path lengths and assortativity. - auditory and visual cortex synchronized burst activations. Secondary outcome: n.a.

Conditions reported: Op het symptoom van hallucinaties in 6 verschillende diagnostische groepen: schizofrenie, Ziekte van Parkinson, Ziekte van Alzheimer, Lewy body dementie, patiënten die slechtziend zijn en patiënten die slechthorend zijn. Hallucinations illusory perceptional experience

Registry records for this study

Records are joined using registration identifiers. Titles alone do not establish that two studies are the same.

Study type
Observational
Interventions
Not reported
Phases
Not reported
Sponsor
Universitair Medisch Centrum Utrecht
Start date reported by registry
2013-12-07 (reported)

Registry updated: Not reported · Status last verified by the registry submitter: Not reported

Registry records retrieved 2026-10-13 (UTC). Individual records may have older updates. Recruitment and eligibility must be confirmed with the study team.

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Public study contacts supplied to the registry. Ask whether recruitment is still open and what participation involves.

Study locations

Site status can differ from overall study status. “Status not reported” means local availability needs confirmation. Remote participation and travel arrangements must be checked with the team.

Facility not reported

Netherlands

Status not reported

The original descriptions and participation rules come from the registry. Participation is voluntary and does not guarantee benefit.