Journal of Neuroscience
April 11, 2012
Giuseppe Pagnoni
Neuroimaging data suggest a link between the spontaneous production of thoughts during wakeful rest and slow fluctuations of activity in the default mode network (DMN), a set of brain regions with high basal metabolism and a major neural hub in the ventral posteromedial cortex (vPMC). Meta-awareness and regulation of mind-wandering are core cognitive components of most contemplative practices...
Journal of Sleep Research
February 1, 2012
Caroline Kusse, Anahita Shaffii-LE Bourdiec, Jessica Schrouff et al.
This study characterizes hypnagogic hallucinations reported during a polygraphically recorded 90-min daytime nap following or preceding practice of the computer game Tetris. In the experimental group (N = 16), participants played Tetris in the morning for 2 h during three consecutive days, while in a first control group (N = 13, controlling the effect of experience) participants did not play...
Neuroimage
January 2, 2012
Wendy Hasenkamp, Christine D Wilson-Mendenhall, Erica Duncan et al.
Studies have suggested that the default mode network is active during mind wandering, which is often experienced intermittently during sustained attention tasks. Conversely, an anticorrelated task-positive network is thought to subserve various forms of attentional processing. Understanding how these two systems work together is central for understanding many forms of optimal and sub-optimal...
Psychological Medicine
January 2012
Amalia Guerrero‐Pedraza, Peter J. McKenna, Jesús J. Gomar et al.
It is not known whether first-episode psychosis is characterized by the same prefrontal cortex functional imaging abnormalities as chronic schizophrenia. Thirty patients with a first episode of non-affective functional psychosis and 28 healthy controls underwent functional magnetic resonance imaging (fMRI) during performance of the n-back working memory task. Voxel-based analyses of brain...
Frontiers in Psychology
2012
Lizette Heine, Andrea Soddu, Francisco Gómez et al.
281 citations
In order to better understand the functional contribution of resting state activity to conscious cognition, we aimed to review increases and decreases in functional magnetic resonance imaging (fMRI) functional connectivity under physiological (sleep), pharmacological (anesthesia), and pathological altered states of consciousness, such as brain death, coma, vegetative state/unresponsive...
Evidence-based Complementary and Alternative Medicine
2012
Brett Froeliger, Eric L Garland, Rachel V Kozink et al.
Meditation practice alters intrinsic resting-state functional connectivity (rsFC) in the default mode network (DMN). However, little is known regarding the effects of meditation on other resting-state networks. The aim of current study was to investigate the effects of meditation experience and meditation-state functional connectivity (msFC) on multiple resting-state networks (RSNs). Meditation...
Current Pharmaceutical Design
2012
Niklaus Denier, Marc Walter, Kerstin Bendfeldt et al.
We conducted a systematic review on resting state cerebral blood flow activities found in first-episode psychosis (FEP) and during acute effects of cannabinoids and opioids, mental states that can be profoundly different from normal functioning. The main goal was to identify connections of cerebral blood flow measure and regional brain activity patterns associated with subjective experiences...
Frontiers in Human Neuroscience
2012
Wendy Hasenkamp, Lawrence W. Barsalou
377 citations
This study sought to examine the effect of meditation experience on brain networks underlying cognitive actions employed during contemplative practice. In a previous study, we proposed a basic model of naturalistic cognitive fluctuations that occur during the practice of focused attention meditation. This model specifies four intervals in a cognitive cycle: mind wandering (MW), awareness of MW,...
Perspectives on Psychological Science
October 14, 2011
Britta K. Hölzel, Sara W. Lazar, Tim Gard et al.
2,997 citations
Cultivation of mindfulness, the nonjudgmental awareness of experiences in the present moment, produces beneficial effects on well-being and ameliorates psychiatric and stress-related symptoms. Mindfulness meditation has therefore increasingly been incorporated into psychotherapeutic interventions. Although the number of publications in the field has sharply increased over the last two decades,...
Movement Disorders
September 23, 2011
James M Shine, Glenda Margaret Halliday, Sharon Linda Naismith et al.
215 citations
Visual misperceptions and hallucinations are a major cause of distress in patients with Parkinson's disease (PD), particularly in the advanced stages of the condition. Recent work has provided a framework for understanding the pathogenesis of these symptoms, implicating impairments from the retina to the integration of external information with preformed internal images. In this article, we...