scholarly journals Aberrant default-mode network-hippocampus connectivity after sad memory-recall in remitted-depression

2017 ◽  
Vol 12 (11) ◽  
pp. 1803-1813 ◽  
Author(s):  
Caroline A Figueroa ◽  
Roel J T Mocking ◽  
Guido van Wingen ◽  
Suzanne Martens ◽  
Henricus G Ruhé ◽  
...  
Keyword(s):  
Default Mode Network ◽  
Memory Recall ◽  
Default Mode ◽  
Remitted Depression

scholarly journals Distinct default mode network subsystems show similarities and differences in the effect of task focus across reading and autobiographical memory

2020 ◽  
Author(s):  
Meichao Zhang ◽  
Xiuyi Wang ◽  
Dominika Varga ◽  
Katya Krieger-Redwood ◽  
Daniel S. Margulies ◽  
...  
Keyword(s):  
Autobiographical Memory ◽  
Default Mode Network ◽  
Mind Wandering ◽  
External Information ◽  
Functional Coupling ◽  
Memory Recall ◽  
Neural Basis ◽  
Default Mode ◽  
Semantic Cognition ◽  
Task Focus

AbstractSemantic cognition can be both perceptually-coupled, for example, during reading, and decoupled, such as in daydreams. Mind-wandering, characterised by autobiographical memory retrieval, often interferes with externally-focussed tasks. This study investigated the neural basis of these states, when they occur in isolation and in competition, using fMRI. Participants were asked to read sentences, presented word-by-word, or to recall personal memories, as a proxy for mind-wandering. Task conflict was created by presenting sentences during memory recall, or memory cues before sentences. We found that different subsystems of the default mode network (DMN) do not fully dissociate across internally- and externally-oriented states, and they do not fully separate in terms of the effects of task focus; this depends on the task. The lateral temporal DMN subsystem, associated with semantic cognition, was activated across both tasks, and by sentence inputs even when they were task-irrelevant. In the core DMN subsystem, greater task focus corresponded to a selective pattern of activation during memory recall and deactivation during reading. Both DMN subsystems formed different patterns of functional coupling depending on the task. In this way, DMN supports both access to meaning from perceptual inputs and focussed internal cognitive states in the face of distracting external information.

scholarly journals Distinct subdivisions of human medial parietal cortex are recruited differentially for memory recall of places and people

2019 ◽  
Author(s):  
Edward H Silson ◽  
Adam Steel ◽  
Alexis Kidder ◽  
Adrian W Gilmore ◽  
Chris I Baker
Keyword(s):  
Parietal Cortex ◽  
Cognitive Processes ◽  
Default Mode Network ◽  
Temporal Cortex ◽  
Visual Presentation ◽  
Memory Recall ◽  
Default Mode ◽  
Scene Processing ◽  
People First ◽  
Ventral Temporal Cortex

AbstractHuman medial parietal cortex (MPC) is implicated in multiple cognitive processes including memory recall, visual scene processing and navigation. It is also considered a core component of the default mode network. Here, we combine fMRI data across three independent experiments to demonstrate distinct subdivisions of MPC that are selectively recruited during memory recall of either specific places or specific people. First, distinct regions of MPC were identified on the basis of differential functional connectivity with medial and lateral regions of anterior ventral temporal cortex (VTC). Second, these same medial regions exhibited differential responses to the visual presentation of different stimulus categories, with clear preferences for scenes and faces, respectively. Third, and most critically, these regions were selectively recruited during either place or people memory recall. These subdivisions also showed a striking relationship with ventral and dorsal divisions of the default mode network. Taken together, these data reveal distinct subdivisions within MPC for the recall of places and people and moreover, suggest that the organizing principle defining the medial-lateral axis of VTC is reflected in MPC, but in the context of memory recall.

scholarly journals Respiration pattern variability and related default mode network connectivity are altered in remitted depression

2018 ◽  
Vol 48 (14) ◽  
pp. 2364-2374 ◽  
Author(s):  
Vera Eva Zamoscik ◽  
Stephanie Nicole Lyn Schmidt ◽  
Martin Fungisai Gerchen ◽  
Christos Samsouris ◽  
Christina Timm ◽  
...  
Keyword(s):  
Default Mode Network ◽  
Daily Life ◽  
Network Connectivity ◽  
Default Mode ◽  
Respiration Frequency ◽  
Respiration Pattern ◽  
Sad Mood ◽  
Remitted Depression ◽  
Pattern Variability

AbstractBackgroundStudies with healthy participants and patients with respiratory diseases suggest a relation between respiration and mood. The aim of the present analyses was to investigate whether emotionally challenged remitted depressed participants show higher respiration pattern variability (RPV) and whether this is related to mood, clinical outcome and increased default mode network connectivity.MethodsTo challenge participants, sad mood was induced with keywords of personal negative life events in individuals with remitted depression [recurrent major depressive disorder (rMDD),n= 30] and matched healthy controls (HCs,n= 30) during functional magnetic resonance imaging. Respiration was measured by means of a built-in respiration belt. Additionally, questionnaires, a daily life assessment of mood and a 3 years follow-up were applied. For replication, we analysed RPV in an independent sample of 53 rMDD who underwent the same fMRI paradigm.ResultsDuring sad mood, rMDD compared with HC showed greater RPV, with higher variability in pause duration and respiration frequency and lower expiration to inspiration ratio. Higher RPV was related to lower daily life mood and predicted higher depression scores as well as relapses during a 3-year follow-up period. Furthermore, in rMDD compared with HC higher main respiration frequency exhibited a more positive association with connectivity of the posterior cingulate cortex and the right parahippocampal gyrus.ConclusionsThe results suggest a relation between RPV, mood and depression on the behavioural and neural level. Based on our findings, we propose interventions focusing on respiration to be a promising additional tool in the treatment of depression.

Increased Default Mode Network Connectivity Following EEG Neurofeedback in PTSD

2012 ◽  
Author(s):  
Rosemarie Kluetsch ◽  
Tomas Ros ◽  
Jean Theberge ◽  
Paul Frewen ◽  
Christian Schmahl ◽  
...  
Keyword(s):  
Default Mode Network ◽  
Network Connectivity ◽  
Default Mode ◽  
Eeg Neurofeedback

Default mode network connections supporting intra-individual variability in typically developing primary school children: An EEG study.

2020 ◽  
Vol 34 (7) ◽  
pp. 811-823
Author(s):  
Evgeniya Yu. Privodnova ◽  
Helena R. Slobodskaya ◽  
Andrey V. Bocharov ◽  
Alexander E. Saprigyn ◽  
Gennady G. Knyazev
Keyword(s):  
Primary School ◽  
School Children ◽  
Default Mode Network ◽  
Individual Variability ◽  
Primary School Children ◽  
Typically Developing ◽  
Default Mode ◽  
Network Connections

Frequency domains of resting state default mode network activity in schizophrenia

2014 ◽  
Vol 45 (01) ◽  
Author(s):  
G Mingoia ◽  
K Langbein ◽  
M Dietzek ◽  
G Wagner ◽  
S Smesny ◽  
...  
Keyword(s):  
Default Mode Network ◽  
Resting State ◽  
Network Activity ◽  
Default Mode ◽  
Frequency Domains
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