Neuroimage
August 19, 2011
Jack A. De Havas, Sarayu Parimal, Chun Siong Soon et al.
371 citations
Sleep deprivation (SD) can alter extrinsic, task-related fMRI signal involved in attention, memory and executive function. However, its effects on intrinsic low-frequency connectivity within the Default Mode Network (DMN) and its related anti-correlated network (ACN) have not been well characterized. We investigated the effect of SD on functional connectivity within the DMN, and on DMN-ACN...
Neuroimage
August 15, 2011
Véronique A. Taylor, Joshua A Grant, Véronique Daneault et al.
There is mounting evidence that mindfulness meditation is beneficial for the treatment of mood and anxiety disorders, yet little is known regarding the neural mechanisms through which mindfulness modulates emotional responses. Thus, a central objective of this functional magnetic resonance imaging study was to investigate the effects of mindfulness on the neural responses to emotionally laden...
Neuroimage
August 1, 2011
Lourence L Lewis-Hanna, Michael D Hunter, Tom F D Farrow et al.
Investigating auditory hallucinations that occur in health may help elucidate brain mechanisms which lead to the pathological experience of auditory hallucinations in neuropsychiatric disorders such as schizophrenia. In this study, we investigated healthy individuals who reported auditory hallucinations whilst falling asleep (hypnagogic hallucinations; HG) and waking up (hypnopompic...
Neuroimage
July 7, 2011
Meditation training increases brain efficiency in an attention task.
Neuroimage
June 29, 2011
Ketamine effects on brain function--simultaneous fMRI/EEG during a visual oddball task.
Neuroimage
June 6, 2011
Enhanced brain connectivity in long-term meditation practitioners.
Neuroimage
May 15, 2011
Christophe Phillips, Marie-Aurélie Bruno, Pierre Maquet et al.
The vegetative state is a devastating condition where patients awaken from their coma (i.e., open their eyes) but fail to show any behavioural sign of conscious awareness. Locked-in syndrome patients also awaken from their coma and are unable to show any motor response to command (except for small eye movements or blinks) but recover full conscious awareness of self and environment. Bedside...
Neuroimage
February 18, 2011
Impact of Mindfulness-Based Stress Reduction training on intrinsic brain connectivity.
Neuroimage
October 20, 2010
Semantic memory involvement in the default mode network: a functional neuroimaging study using independent component analysis.
Neuroimage
June 9, 2010
Slow EEG pattern predicts reduced intrinsic functional connectivity in the default mode network: an inter-subject analysis.
Neuroimage
April 11, 2010
Kaustubh Supekar, Lucina Q. Uddin, Katherine E. Prater et al.
548 citations
Functional and structural maturation of networks comprised of discrete regions is an important aspect of brain development. The default-mode network (DMN) is a prominent network which includes the posterior cingulate cortex (PCC), medial prefrontal cortex (mPFC), medial temporal lobes (MTL), and angular gyrus (AG). Despite increasing interest in DMN function, little is known about its...
Neuroimage
March 12, 2010
Effects of aging on default mode network activity in resting state fMRI: does the method of analysis matter?
Neuroimage
December 17, 2009
Zhigang Qi, Xia Wu, Zhiqun Wang et al.
328 citations
Mild cognitive impairment (MCI) is the transitional, heterogeneous continuum from healthy elderly to Alzheimer's disease (AD). Previous studies have shown that brain functional activity in the default mode network (DMN) is impaired in AD patients. However, altering DMN activity patterns in MCI patients remains largely unclear. The present study utilized resting-state functional magnetic...
Neuroimage
October 29, 2009
Stefan J. Teipel, Arun L.w. Bokde, Thomas Meindl et al.
205 citations
Resting state functional magnetic resonance imaging (fMRI) reveals a distinct network of correlated brain function representing a default mode state of the human brain. The underlying structural basis of this functional connectivity pattern is still widely unexplored. We combined fractional anisotropy measures of fiber tract integrity derived from diffusion tensor imaging (DTI) and resting...
Neuroimage
September 1, 2009
Antoine Lutz, Lawrence L. Greischar, David M Perlman et al.
The brain and the cardiovascular system influence each other during the processing of emotion. The study of the interactions of these systems during emotion regulation has been limited in human functional neuroimaging, despite its potential importance for physical health. We have previously reported that mental expertise in cultivation of compassion alters the activation of circuits linked with...
Neuroimage
May 15, 2009
Catie Chang, Gary H. Glover
510 citations
Previous studies have reported that the spontaneous, resting-state time course of the default-mode network is negatively correlated with that of the "task-positive network", a collection of regions commonly recruited in demanding cognitive tasks. However, all studies of negative correlations between the default-mode and task-positive networks have employed some form of normalization or...
Neuroimage
April 1, 2009
The underlying anatomical correlates of long-term meditation: larger hippocampal and frontal volumes of gray matter.
Neuroimage
January 15, 2009
K. Jann, T. Dierks, C. Boesch et al.
290 citations
Phase locking or synchronization of brain areas is a key concept of information processing in the brain. Synchronous oscillations have been observed and investigated extensively in EEG during the past decades. EEG oscillations occur over a wide frequency range. In EEG, a prominent type of oscillations is alpha-band activity, present typically when a subject is awake, but at rest with closed...
Neuroimage
July 1, 2008
Jacob M Hooker, Youwen Xu, Wynne Schiffer et al.
106 citations
Salvia divinorum, a mint plant originally used by the Mazatecs of Oaxaca, Mexico in spiritual rituals has gained popularity, in smoked form, as a legal hallucinogen in the United States and Europe. Abuse results in rapid onset and short-lasting effects that include visual hallucinations and motor-function impairment. Salvinorin A, the psychoactive component of S. divinorum, is a uniquely potent...
Neuroimage
June 13, 2008
Peter Fransson, Guillaume Marrelec
1,236 citations
Recent research has shown that intrinsic brain activity as observed by functional magnetic resonance imaging (fMRI) manifest itself as coherent signal changes in networks encompassing brain regions that span long-range neuronal pathways. One of these networks, the so called default mode network, has become the primary target in recent investigations to link intrinsic activity to cognition and...
Neuroimage
January 17, 2008
Andrew C.N. Chen, Weijia Feng, Huixuan Zhao et al.
261 citations
Eyes-closed (EC) and eyes-open (EO) are essential behaviors in mammalians, including man. At resting EC-EO state, brain activity in the default mode devoid of task-demand has recently been established in fMRI. However, the corresponding comprehensive electrophysiological conditions are little known even though EEG has been recorded in humans for nearly 80 years. In this study, we examined the...
Neuroimage
February 15, 2006
Kristen A McKiernan, Benjamin R D'Angelo, Jacqueline N Kaufman et al.
In functional neuroimaging, a local decrease in blood flow during an active task, relative to a "resting" baseline, is referred to as task-induced deactivation (TID). TID may occur when resources shift from ongoing, internally generated processing typical of "resting" states to processing required by an exogenous task. We previously found specific brain regions in which TID increased as task...
Neuroimage
September 1, 2004
Diego Cosmelli, Olivier David, Jean-Philippe Lachaux et al.
We present here ongoing patterns of distributed brain synchronous activity that correlate with the spontaneous flow of perceptual dominance during binocular rivalry. Specific modulation of the magnetoencephalographic (MEG) response evoked during conscious perception of a frequency-tagged stimulus was evidenced throughout rivalry. Estimation of the underlying cortical sources revealed, in...