Étiquette : connectivité

Bridging the Gap ? Altered Thalamocortical Connectivity in Psychotic and Psychedelic States, Mihai Avram et al., 2021

Bridging the Gap ? Altered Thalamocortical Connectivity in Psychotic and Psychedelic States Mihai Avram, Helena Rogg, Alexandra Korda, Christina Andreou, Felix Müller and Stefan Borgwardt Frontiers in Psychiatry, 2021, Volume 12, Article 706017, 1-13. Doi : 10.3389/fpsyt.2021.706017   Psychiatry has a well-established tradition of comparing drug-induced experiences to psychotic symptoms, based on shared phenomena such as altered perceptions. The present review focuses on experiences induced by classic psychedelics, which are substances capable of eliciting powerful psychoactive effects, characterized by distortions/alterations of several neurocognitive processes (e.g., hallucinations). Herein we refer to such experiences as psychedelic states. Psychosis is a clinical syndrome defined by impaired reality testing, [...]

Lire la suite

The effect of cannabidiol (CBD) on low-frequency activity and functional connectivity in the brain of adults with and without autism spectrum disorder (ASD), Charlotte M Pretzsch et al., 2019

The effect of cannabidiol (CBD) on low-frequency activity and functional connectivity in the brain of adults with and without autism spectrum disorder (ASD) Charlotte M. Pretzsch, Bogdan Voinescu, Maria A. Mendez, Robert Wichers, Laura Ajram, Glynis Ivin, Martin Heasman, Steven Williams, Declan GM Murphy, Eileen Daly and Gráinne M. McAlonan Journal of Psychopharmacology, 2019, Vol. 33, (9), 1141–1148 Doi : 10.1177/0269881119858306   Abstract Background : The potential benefits of cannabis and its major non-intoxicating component cannabidiol (CBD) are attracting attention, including as a potential treatment in neurodevelopmental disorders such as autism spectrum disorder (ASD). However, the neural action of CBD, and its relevance to ASD, remains [...]

Lire la suite

Dynamic coupling of whole-brain neuronal and neurotransmitter systems, Morten L. Kringelbach et al., 2020

Dynamic coupling of whole-brain neuronal and neurotransmitter systems Morten L. Kringelbach, Josephine Cruzat, Joana Cabral, Gitte Moos Knudsen, Robin Carhart-Harris, Peter C. Whybrow Nikos K. Logothetis, and Gustavo Deco PNAS, 2020, 1-11 doi : 10.1073/pnas.1921475117   Remarkable progress has come from whole-brain models linking anatomy and function. Paradoxically, it is not clear how a neuronal dynamical system running in the fixed human anatomical connectome can give rise to the rich changes in the functional repertoire associated with human brain function, which is impossible to explain through long-term plasticity. Neuromodulation evolved to allow for such flexibility by dynamically updating the effectivity of the fixed anatomical connectivity. [...]

Lire la suite