Neuropsychopharmacology
March 1, 2016
Elena H Chartoff, Shayla R Ebner, Angela Sparrow et al.
Negative affective states can increase the rewarding value of drugs of abuse and promote drug taking. Chronic cocaine exposure increases levels of the neuropeptide dynorphin, an endogenous ligand at kappa opioid receptors (KOR) that suppresses dopamine release in the nucleus accumbens (NAc) and elicits negative affective states upon drug withdrawal. However, there is evidence that the effects...
European Psychiatry
March 1, 2016
Laura Orsolini, Alessandro Valchera, Duccio Papanti et al.
3 citations
Introduction Hallucinogen Persisting Perception Disorder (HPPD) is a syndrome characterized by prolonged or reoccurring perceptual symptoms, reminiscent of acute hallucinogen effects. HPPD was associated with a broader range of LSD (lysergic acid diethylamide)-like substances, including cannabis, MDMA (methylenedioxymethamphetamine), psilocybin, mescaline and other psychostimulants....
Asian Studies
February 29, 2016
Hisaki Hashi
6 citations
In our time of an information highway, digital networks are linked around the clock. Among various data many people are unconsciously depending on IT and digital medias with their body––but without any mind. The human origin, its creative thinking and acting, transmitting one idea to another for reforming and developing something new has been quite forgotten. Against this omnipresent phenomenon...
Clinical and Translational Science
February 26, 2016
Tal Burt, K Yoshida, Graham Lappin et al.
91 citations
A number of drivers and developments suggest that microdosing and other phase 0 applications will experience increased utilization in the near-to-medium future. Increasing costs of drug development and ethical concerns about the risks of exposing humans and animals to novel chemical entities are important drivers in favor of these approaches, and can be expected only to increase in their...
PLoS One
February 22, 2016
Daniela Dentico, Fabio Ferrarelli, Brady A. Riedner et al.
43 citations
STUDY OBJECTIVES: We have recently shown higher parietal-occipital EEG gamma activity during sleep in long-term meditators compared to meditation-naive individuals. This gamma increase was specific for NREM sleep, was present throughout the entire night and correlated with meditation expertise, thus suggesting underlying long-lasting neuroplastic changes induced through prolonged training. The...
Translational Psychiatry
February 16, 2016
C J A Morgan, Tom P. Freeman, J Powell et al.
Smoking cannabis daily doubles an individual's risk of developing a psychotic disorder, yet indicators of specific vulnerability have proved largely elusive. Genetic variation is one potential risk modifier. Single-nucleotide polymorphisms in the AKT1 and catechol-O-methyltransferase (COMT) genes have been implicated in the interaction between cannabis, psychosis and cognition, but no studies...
Scientific Reports
February 11, 2016
Julia Natascha Frey, Philipp Ruhnau, Sabine Leske et al.
We recently proposed that besides levels of local cortical excitability, also distinct pre-stimulus network states (windows to consciousness) determine whether a near-threshold stimulus will be consciously perceived. In the present magnetoencephalography study, we scrutinised these pre-stimulus network states with a focus on the primary somatosensory cortex. For this purpose participants...
Frontiers in Human Neuroscience
February 1, 2016
M. Sharaev, V. V. Zavyalova, Vadim Ushakov et al.
The Default Mode Network (DMN) is a brain system that mediates internal modes of cognitive activity, showing higher neural activation when one is at rest. Nowadays, there is a lot of interest in assessing functional interactions between its key regions, but in the majority of studies only association of Blood-oxygen-level dependent (BOLD) activation patterns is measured, so it is impossible to...
European Neuropsychopharmacology
February 2016
Alexandre Seillier, Andrea Giuffrida
Previous studies have shown that social withdrawal in the phencyclidine (PCP) rat model of schizophrenia results from deficient endocannabinoid-induced activation of CB1 receptors. To understand the underlying cognitive mechanisms of the social deficit in PCP-treated rats, we examined the impact of pharmacological manipulation of the endocannabinoid system on sociability (i.e. social approach)...
Brain Connectivity
February 1, 2016
Tun Jao, Chia-Wei Li, Petra E Vértes et al.
Meditation induces a distinct and reversible mental state that provides insights into brain correlates of consciousness. We explored brain network changes related to meditation by graph theoretical analysis of resting-state functional magnetic resonance imaging data. Eighteen Taoist meditators with varying levels of expertise were scanned using a within-subjects counterbalanced design during...