Natural phenomena are reducible to quantum events in principle, but quantum mechanics does not always provide the best level of analysis. The many-body problem, chaotic avalanches, materials properties, biological organisms, and weather systems are better addressed at higher levels. Animals are highly organized, goal-directed, adaptive, selectionist, information-preserving, functionally...
3,4-Methylenedioxymethamphetamine (MDMA, ecstasy) is a drug of abuse that induces learning and memory deficit. However, there are no experimental data that correlate the behavioral evidence with models of synaptic plasticity such as long-term potentiation (LTP) or long-term depression (LTD). Using field potential recordings in rat hippocampal slices of young rats, we found that acute...
Using diffusion tensor imaging, several recent studies have shown that training results in changes in white matter efficiency as measured by fractional anisotropy (FA). In our work, we found that a form of mindfulness meditation, integrative body-mind training (IBMT), improved FA in areas surrounding the anterior cingulate cortex after 4-wk training more than controls given relaxation training....
One component of mindfulness training (MT) is the development of interoceptive attention (IA) to visceral bodily sensations, facilitated through daily practices such as breath monitoring. Using functional magnetic resonance imaging (fMRI), we examined experience-dependent functional plasticity in accessing interoceptive representations by comparing graduates of a Mindfulness-Based Stress...
A convergent line of neuroscientific evidence suggests that meditation alters the functional and structural plasticity of distributed neural processes underlying attention and emotion. The purpose of this study was to examine the brain structural differences between a well-matched sample of long-term meditators and controls. We employed whole-brain cortical thickness analysis based on magnetic...
Drawing upon research in neuroscience, cognitive science, developmental psychology and education, as well as scholarship from contemplative traditions concerning the cultivation of positive development, we highlight a set of mental skills and socio-emotional dispositions that we believe are central to the aims of education in the 21(st) century. These include self-regulatory skills associated...
The objective of this work is to characterize genetic and proteomic changes in a novel rat model of schizophrenia. Three‐month treatment with low doses of the hallucinogenic drug, LSD, induces a range of abnormal behaviors including social deficits, hyperactivity, and anhedonia. These behavioral changes persist in the absence of drug , and likely result from neuroadaptive changes in the medial...
Nature NeuroscienceJanuary 8, 2012Cristiano Nazzaro, Barbara Greco, Milica Cerovic et al.
Endocannabinoids (eCBs) regulate neuronal activity in the dorso-lateral striatum (DLS), a brain region that is involved in habitual behaviors. How synaptic eCB signaling contributes to habitual behaviors under physiological and pathological conditions remains unclear. Using a mouse model of cannabinoid tolerance, we found that persistent activation of the eCB pathway impaired eCB-mediated...
Hatha yoga techniques, including physical postures (asanas), breathing exercises (pranayama), and meditation, involve the practice of mindfulness. In turn, yoga meditation practices may induce the state of mindfulness, which, when evoked recurrently through repeated practice, may accrue into trait or dispositional mindfulness. Putatively, these changes may be mediated by experience-dependent...
Recent studies into the molecular, pharmacological and behavioral basis of psychotomimetics such as the glutamate N-methyl- D -aspartate receptor (NMDAR) antagonist ketamine and the mixed 5- hydroxytryptamine (5-HT) receptor agonist psilocybin in healthy human subjects suggest that both the glutamatergic and serotonergic system are implicated in the pathophysiolology of psychotic disorders such...