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Investigating the Mechanisms of the Effects of Psilocybin on Visual Perception and Visual Representations in the Brain

StatusRecruiting
PhasePhase 1
Started
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Record History

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  1. Primary and study completion dates: Dec 31, 2025 to Dec 31, 2028
    • Site contact updated
    v11
  2. Re-verified, no change to tracked fieldsv10
  3. Site contact updatedv9
  4. Site contact updatedv8
  5. Secondary endpoints: details revised at 1 of 3 entriesv7
Show 5 earlier versionsHide 5 earlier versions
  1. Trial status: Not Yet Recruiting to Recruiting
    • Start date: Feb 14, 2024 to Mar 8, 2024
    • Site details revised
    v6
  2. Start date: Nov 20, 2023 to Feb 14, 2024v5
  3. Start date: Nov 15, 2023 to Nov 20, 2023
    • Secondary endpoints: details revised at 1 of 3 entries
    v4
  4. Start date: Oct 1, 2022 to Nov 15, 2023v3
  5. Start date: May 1, 2022 to Oct 1, 2022
    • Eligibility criteria shortened, about 118 words
    • Secondary endpoints expanded, about 7 words
    v2
  1. Study First Submitted
  • Stopped: an ongoing trial was terminated, suspended or withdrawn.
  • Notable: the trial’s plan changed such as a big move in its timeline or size, a new primary endpoint, sponsor or phase, or recruiting opened or resumed.
  • Minor: routine progress and housekeeping, such as sites added or enrollment closed.
The long-term objective of this project is to characterize how psilocybin affects visual perception and the brain's representation of the visual environment. It is known that psilocybin alters aspects of visual perception, but the underlying brain mechanisms contributing to these effects are poorly understood. The proposed work will address these questions in a large, diverse sample of healthy human subjects by using functional magnetic resonance imaging (fMRI) to measure the brain's responses to visual stimuli. The proposed research will document which brain areas mediate the effects of psilocybin. The technique of fMRI will be employed to measure brain activity in different brain areas while subjects are performing a visual perceptual task.
Trial Details
NCT Number NCT05265546
Lead Sponsor University of California, Berkeley
Conditions
(from sponsor)		 Perception Disorders
Enrollment 80 participants
Start Date
Primary Completion (estimated)
Study Completion (estimated)
Updated on ClinicalTrials.gov