Psychiatry Research
January 14, 2020
Clemens C C Bauer, Kana Okano, Satrajit Ghosh et al.
87 citations
Auditory hallucinations (AHs) are one of the most distressing symptoms of schizophrenia (SZ) and are often resistant to medication. Imaging studies of individuals with SZ show hyperactivation of the default mode network (DMN) and the superior temporal gyrus (STG). Studies in SZ show DMN hyperconnectivity and reduced anticorrelation between DMN and the central executive network (CEN). DMN...
Evolutionary Perspectives on Imaginative Culture
2020
Joseph Carroll
AbstractThe purpose of this chapter is to explain how imaginative verbal artifacts are produced by the imagination and in turn influence the imagination. Assimilating recent neuroscientific research on the evolution of modern brain shape and on the brain’s default mode network, we can now say with confidence that the imagination is a neurological reality, that it is lodged in specific parts of...
Cerebral Cortex
December 18, 2019
Matthew Owens, D. Yuan, S. Hahn et al.
preprint
The default mode network (DMN) and dorsal attention network (DAN) demonstrate an intrinsic "anticorrelation" in healthy adults, which is thought to represent the functional segregation between internally and externally directed thought. Reduced segregation of these networks has been proposed as a mechanism for cognitive deficits that occurs in many psychiatric disorders, but this association...
Journal of Neuroscience Research
November 20, 2019
Carissa L. Philippi, J. Bruss, Aaron D. Boes et al.
Functional neuroimaging research has consistently associated brain structures within the default mode network (DMN) and frontoparietal network (FPN) with mind‐wandering. Targeted lesion research has documented impairments in mind‐wandering after damage to the medial prefrontal cortex (mPFC) and hippocampal regions associated with the DMN. However, no lesion studies to date have applied lesion...
Scientific Reports
November 7, 2019
Meichao Zhang, Nicola Savill, Daniel S. Margulies et al.
48 citations
Often, as we read, we find ourselves thinking about something other than the text; this tendency to mind-wander is linked to poor comprehension and reduced subsequent memory for texts. Contemporary accounts argue that periods of off-task thought are related to the tendency for attention to be decoupled from external input. We used fMRI to understand the neural processes that underpin this...
Scientific Reports
November 5, 2019
Matteo De Marco, Sebastien Ourselin, Annalena Venneri
Abstract: Group comparison studies have established that activity in the posterior part of the default-mode network (DMN) is down-regulated by both normal ageing and Alzheimer’s disease (AD). In this study linear regression models were used to disentangle distinctive DMN activity patterns that are more profoundly associated with either normal ageing or a structural marker of neurodegeneration....
eNeuro
November 1, 2019
Clemens C C Bauer, Susan Whitfield-Gabrieli, J L Díaz et al.
While brain default mode network (DMN) activation in human subjects has been associated with mind wandering, meditation practice has been found to suppress it and to increase psychological well-being. In addition to DMN activity reduction, experienced meditators (EMs) during meditation practice show an increased connectivity between the DMN and the central executive network (CEN). However, the...
Frontiers in Neuroscience
October 4, 2019
Marco Marino, Giorgio Arcara, Camillo Porcaro et al.
Hemodynamic fluctuations in the default mode network (DMN), observed through functional magnetic resonance imaging (fMRI), have been linked to electrophysiological oscillations detected by electroencephalography (EEG). It has been reported that, among the electrophysiological oscillations, those in the alpha frequency range (8–13 Hz) are the most dominant during resting state. We hypothesized...
Frontiers in Behavioral Neuroscience
October 2, 2019
Felicia Von Düring, I. Ristow, M. Li et al.
Background Brain investigations identified salience network (SN) comprising the dorsal Anterior Cingulate Cortex (dACC) and the Anterior Insula (AI). Magnetic resonance spectroscopy (MRS) studies revealed the link between the glutamate concentration in the ACC and alterations in attentional scope. Hence, we investigated whether glutamate concentration in the dACC modulates brain response during...
Computers in Human Behavior
October 1, 2019
Daniel R. Anderson, M. Davidson
Abstract Recent neuroscience research has revealed the presence of multiple brain networks underlying functional human psychology. One of these, the default mode network (DMN), has been shown to underlie sustained attention to and comprehension of narrative receptive media such as television. We argue that DMN activation enhances learning of temporal and spatial context and that this type of...