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Dysfunctions in reward processing in mesolimbic and mesocortical pathways are a core feature of many pathologies. Psychedelics have been proposed as a treatment option for multiple disorders affecting the reward system, but mechanistic studies are lacking. In this preliminary, hypothesis-generating pharmacoimaging study, we evaluated the effects of inhaled N, N-dimethyltryptamine (DMT) with a particular focus on the connectivity of the mesocorticolimbic circuitry. Our within-subject pharmacoimaging design included 11 healthy participants with prior experience in psychedelics. In the active condition, DMT was self-administered immediately before MRI acquisition, while in the control condition there was no administration. We found decreased connectivity between the right nucleus accumbens (NAc) and the left ventral tegmental area (VTA), increased connectivity between the right NAc and anterior cingulate cortex (ACC) and increased connectivity between the medial prefrontal cortex (mPFC) and the ACC. These results correlated with changes in volition and perception, as measured with the hallucination rating scale. In sum, we found reduced connectivity in the midbrain-NAc pathway, which connectivity is often increased in addiction, and increased connectivity between reward\/affective regions and the ACC. These findings suggest a potential therapeutic potential of psychedelics in disorders affecting reward processing.<\/jats:p>","DOI":"10.1038\/s41598-025-31431-1","type":"journal-article","created":{"date-parts":[[2025,12,12]],"date-time":"2025-12-12T03:37:10Z","timestamp":1765510630000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Inhaled N, N-dimethyltryptamine diminishes connectivity between the ventral tegmental area and the nucleus accumbens: relevance to pathologies of mesolimbic and mesocortical pathways"],"prefix":"10.1038","volume":"16","author":[{"given":"Gisela","family":"Lima","sequence":"first","affiliation":[]},{"given":"Carla","family":"Soares","sequence":"additional","affiliation":[]},{"given":"Marta","family":"Teixeira","sequence":"additional","affiliation":[]},{"given":"Marta","family":"Pais","sequence":"additional","affiliation":[]},{"given":"C\u00e9lia","family":"Cabral","sequence":"additional","affiliation":[]},{"given":"Patr\u00edcia","family":"Rijo","sequence":"additional","affiliation":[]},{"given":"Miguel","family":"Castelo-Branco","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2025,12,12]]},"reference":[{"issue":"3","key":"31431_CR1","doi-asserted-by":"publisher","first-page":"183","DOI":"10.1038\/nrn.2015.26","volume":"17","author":"W Schultz","year":"2016","unstructured":"Schultz, W. 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