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Anna Søndergaard

3 papers in the library · 35 citations · publishing 2022-2026

Papers

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Psilocybin's effect on human brain synaptic plasticity.

Translational Psychiatry July 15, 2026 Annette Johansen, Pontus Plavén-sigray, Martin K Madsen et al.

Psychedelics such as psilocybin have been linked to enhanced neuroplasticity and symptom relief in affective disorders, but the neurobiological mechanisms and impact of environmental context remain unclear. Here, we tested whether a single dose of psilocybin (0.3 mg/kg) alters synaptic density in healthy individuals and whether setting-dependent subjective experience shapes this effect. Fifteen...

Psilocybin’s effect on human brain synaptic plasticity

Research Square October 10, 2025 Gitte M. Knudsen, Annette Johansen, Pontus Plavén-sigray et al.

Abstract Psychedelics such as psilocybin have been linked to enhanced neuroplasticity and symptom relief in affective disorders, but the neurobiological mechanisms and impact of environmen-tal context remain unclear. Here, we tested whether a single dose of psilocybin alters synap-tic density in healthy individuals and whether setting-dependent subjective experience shapes this effect. Fifteen...

Lasting increases in trait mindfulness after psilocybin correlate positively with the mystical-type experience in healthy individuals

Frontiers in Psychology October 5, 2022 Anna Søndergaard, Brice Ozenne, Sophia Armand et al. 35 citations

Background Psilocybin-induced mystical-type experiences are associated with lasting positive psychological outcomes. Recent studies indicate that trait mindfulness is increased 3 months after psilocybin intake, preceded by decreases in neocortical serotonin 2A receptor (5-HT 2A R) binding. However, the association between psilocybin-induced mystical-type experiences and subsequent changes in...