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Addiction: all studies

Page 510 of 857: studies 5,091 to 5,100 of 8,563, newest first. Back to the addiction overview

Research

Symptomatology and neurocognition among first-episode psychosis patients with and without cannabis use in the three months prior to first hospitalization.

Schizophrenia Research January 9, 2021 Leah G. Pope, M. Manseau, M. Kelley et al.

OBJECTIVE The nature of associations between recent cannabis use and negative symptoms, positive symptoms, and neurocognitive deficits remains unclear. In a relatively large sample of well-characterized patients with first-episode psychosis, we hypothesized that, compared to first-episode patients without cannabis use in the three months prior to first hospitalization, those having used...

The acute effects of classic psychedelics on memory in humans

Psychopharmacology January 9, 2021 C. J. Healy 95 citations

RationaleMemory plays a central role in the psychedelic experience. The spontaneous recall and immersive reliving of autobiographical memories has frequently been noted by researchers and clinicians as a salient phenomenon in the profile of subjective effects of classic psychedelic drugs such as psilocybin, LSD, and ayahuasca. The ability for psychedelics to provoke vivid memories has been...

Ketamine Rapidly Enhances Glutamate-Evoked Dendritic Spinogenesis in Medial Prefrontal Cortex Through Dopaminergic Mechanisms.

Biological Psychiatry January 8, 2021 Mingzheng Wu, Samuel Minkowicz, V. Dumrongprechachan et al. 96 citations

BACKGROUND Ketamine elicits rapid onset antidepressant effects in patients with clinical depression through mechanisms hypothesized to involve the genesis of neocortical dendritic spines and synapses. Yet, the observed changes in dendritic spine morphology usually emerge well after ketamine clearance, raising questions about the link between rapid behavioral effects of ketamine and plasticity....

Whatever Next and Close to my Self – The Transparent Senses and the ‘Second Skin’: Implications for the Case of Depersonalisation

PsyArXiv January 5, 2021 Anna Ciaunica, Bruna Petreca, Aikaterini Fotopoulou et al. preprint

In his seminal paper ‘Whatever next? Predictive brains, situated agents, and the future of cognitive science’ Andy Clark (2013) argued that the brain’s job is to predict whatever information is coming ‘next’ on the basis of prior inputs. This is because the organism’s survival is key to biological agents such as humans. Survival however crucially depends on rapid and accurate information...

The group II mGlu receptor antagonist LY341495 induces a rapid antidepressant-like effect and enhances the effect of ketamine in the chronic unpredictable mild stress model of depression in C57BL/6J mice.

Progress in Neuro-Psychopharmacology and Biological Psychiatry January 2, 2021 Agnieszka Pałucha-Poniewiera, K. Podkowa, Anna Rafało-Ulińska

Ketamine produces a rapid antidepressant effect, but its use can be associated with serious side effects. Hence, other therapeutic options that will allow us to obtain a quick and safe antidepressant effect by modulating glutamatergic transmission are needed. Antagonists of mGlu2/3 receptors, which share some mechanisms of action with ketamine, may be good candidates to obtain this effect....

Du rêve comme passivité : Merleau-ponty entre Sartre et Binswanger

Chiasmi International 2021 Giulia Andreini, Chiasmi International 1 citation

Always rich in heterogeneous suggestions, Merleau-Pontian reflection does not fail to address the status of oneiric experience, which is as complex as it is neglected or even trivialized in phenomenological studies. Although it is sometimes taken into consideration, notably in Sartrean analyses, this is only to reconduct it to the activity of the imagining consciousness. This contribution thus...

CNR2 GENE AND CANNABIS USE INTERPLAY MODULATES MANIPULATIVE ABILITIES IN FIRST-EPISODE OF PSYCHOSIS

Libro Comunicaciones 2021 Maitane Oscoz-Irurozqui, Maria Guardiola-Ripoll, Carmen Almodóvar-Payá et al.

1. Objectives: While endocannabinoid system seems to be involved in processes underlying psychosis, research about Cannabinoid Receptor 2 gene (CNR2) is scarce and inconclusive. Some few reports indicate that CNR2 plays a role in psychiatric conditions, including depression or drug addiction (Onaivi et al., 2009). We aimed to evaluate the role of CNR2 and its interplay with cannabis on...

American Trip: Set, Setting, and the Psychedelic Experience in the Twentieth Century by Ido Hartogsohn

New York History 2021 Devin R. Lander

Reviewed by: American Trip: Set, Setting, and the Psychedelic Experience in the Twentieth Century by Ido Hartogsohn Devin Lander (bio) American Trip: Set, Setting, and the Psychedelic Experience in the Twentieth Century By Ido Hartogsohn. Cambridge, MA: MIT Press, 2020. 432 pages, 6" x 9". $35.00 paper, $35.00 ebook. Ido Hartogsohn, assistant professor in the program for science, technology,...

Roles of TRPC3 and TRPC6 in the medial prefrontal cortex in the antidepressant-like actions of ketamine

Proceedings for Annual Meeting of The Japanese Pharmacological Society 2021 Satoshi Deyama, Katsuyuki Kaneda

The antidepressant actions of the NMDA receptor antagonist ketamine require activity-dependent release of brain-derived neurotrophic factor (BDNF) in the medial prefrontal cortex (mPFC). Our recent study shows a similar requirement for vascular endothelial growth factor (VEGF). Previous studies have reported that both BDNF and VEGF activate TRPC3 and TRPC6 via diacylglycerol production, and...

Comparison of free description and semi-structured interview as methods of studying near-death experience

National Psychological Journal 2021 O. V. Gordeeva

Relevance of the article. Without the use of the self-report method, it is impossible to study a number of psychological phenomena (for example, hallucinosis, the study of which allows us to understand the mechanisms of formation of perceptual, dream, mnestic, imaginative images). At the same time, the possibilities and limitations of two variants of the self-report method — an interview about...