scholarly journals Complementary roles of neural synchrony and complexity for indexing consciousness and chances of surviving in acute coma

NeuroImage ◽  
2021 ◽  
pp. 118638
Author(s):  
Sigurd L. Alnes ◽  
Marzia De Lucia ◽  
Andrea O. Rossetti ◽  
Athina Tzovara
Keyword(s):  
2021 ◽  
Vol 48 ◽  
pp. 100937
Author(s):  
Caroline P. Hoyniak ◽  
Laura E. Quiñones-Camacho ◽  
M. Catalina Camacho ◽  
Jenna H. Chin ◽  
Elizabeth M. Williams ◽  
...  

2019 ◽  
Author(s):  
Tanya Lecchi ◽  
Ksenija da Silva ◽  
Fabio Giommi ◽  
Victoria Leong

The therapeutic alliance represents an important variable in explaining the outcome of mental health treatment. In particular, research suggests that mindfulness practice might help therapists to develop skills that are key to a good therapeutic alliance. Although the therapeutic alliance is well-recognised from a clinical perspective, basic quantitative research is still lacking about the neurocognitive mechanisms involved in establishing and maintaining the alliance between individuals. Recent advances in two-person neuroscience research have demonstrated that interpersonal neural synchrony -which may develop between speaker and listener, or parent and child -is a strong predictor of mutual understanding as well as social learning and influence. Further, social cues that improve communication quality and clarify intent effectively modulate levels of interpersonal neural synchrony, suggesting that this neural index is sensitive to dynamic changes in speaker-listener engagement. Given that the therapeutic alliance depends strongly on shared intentionality and mutual engagement between therapist and client, interpersonal neural synchrony may also index the quality and strength of the therapist-client alliance, and predict treatment outcome. If so, this quantitative neural index could provide a useful clinical tool for measuring and understanding the nature and efficacy of the therapeutic alliance. The present paper discusses these hypotheses, presenting preliminary data from a pilot study investigating neural synchrony between clients and therapists in face-to-face and videoconference interactions, comparing therapists who practice mindfulness with therapists without any mindfulness experience.


2021 ◽  
Vol 118 (20) ◽  
pp. e2022491118
Author(s):  
Jeroen M. van Baar ◽  
David J. Halpern ◽  
Oriel FeldmanHall

Political partisans see the world through an ideologically biased lens. What drives political polarization? Although it has been posited that polarization arises because of an inability to tolerate uncertainty and a need to hold predictable beliefs about the world, evidence for this hypothesis remains elusive. We examined the relationship between uncertainty tolerance and political polarization using a combination of brain-to-brain synchrony and intersubject representational similarity analysis, which measured committed liberals’ and conservatives’ (n = 44) subjective interpretation of naturalistic political video material. Shared ideology between participants increased neural synchrony throughout the brain during a polarizing political debate filled with provocative language but not during a neutrally worded news clip on polarized topics or a nonpolitical documentary. During the political debate, neural synchrony in mentalizing and valuation networks was modulated by one’s aversion to uncertainty: Uncertainty-intolerant individuals experienced greater brain-to-brain synchrony with politically like-minded peers and lower synchrony with political opponents—an effect observed for liberals and conservatives alike. Moreover, the greater the neural synchrony between committed partisans, the more likely that two individuals formed similar, polarized attitudes about the debate. These results suggest that uncertainty attitudes gate the shared neural processing of political narratives, thereby fueling polarized attitude formation about hot-button issues.


2021 ◽  
Author(s):  
Jacob G. McPherson ◽  
Maria F. Bandres

AbstractPurposeful functional connectivity during unconsciousness is a defining feature of supraspinal networks. However, its generalizability to intrinsic spinal networks remains incompletely understood. Previously, Barry et al. (2014) used fMRI to reveal bilateral resting state functional connectivity within sensory-dominant and, separately, motor-dominant regions of the spinal cord. Here, we record spike trains from large populations of spinal interneurons in vivo and demonstrate that spontaneous functional connectivity also links sensory- and motor-dominant regions during unconsciousness. The spatiotemporal patterns of connectivity could not be explained by latent afferent activity or by populations of interconnected neurons spiking randomly. We also document connection latencies compatible with mono- and di-synaptic interactions and putative excitatory and inhibitory connections. The observed activity is consistent with a network policy in which salient, experience-dependent patterns of neural transmission introduced during behavior or by injury/disease are reactivated during unconsciousness. Such a spinal replay mechanism could shape circuit-level connectivity and ultimately behavior.


2015 ◽  
Vol 26 (7) ◽  
pp. 3010-3022 ◽  
Author(s):  
Jonathan Levy ◽  
Juan R. Vidal ◽  
Pascal Fries ◽  
Jean-François Démonet ◽  
Abraham Goldstein

2021 ◽  
pp. 1-13
Author(s):  
Laura E. Quiñones-Camacho ◽  
Caroline P. Hoyniak ◽  
Lauren S. Wakschlag ◽  
Susan B. Perlman

Abstract While substantial research supports the role of parent–child interactions on the emergence of psychiatric symptoms, few studies have explored biological mechanisms for this association. The current study explored behavioral and neural parent–child synchronization during frustration and play as predictors of internalizing and externalizing behaviors across a span of 1.5 years. Parent–child dyads first came to the laboratory when the child was 4–5 years old and completed the Disruptive Behavior Diagnostic Observation Schedule: Biological Synchrony (DB-DOS: BioSync) task while functional near-infrared spectroscopy (fNIRS) data were recorded. Parents reported on their child's internalizing and externalizing behaviors using the Child Behavior Checklist (CBCL) four times over 1.5 years. Latent growth curve (LGC) modeling was conducted to assess neural and behavioral synchrony as predictors of internalizing and externalizing trajectories. Consistent with previous investigations in this age range, on average, internalizing and externalizing behaviors decreased over the four time points. Parent–child neural synchrony during a period of play predicted rate of change in internalizing but not externalizing behaviors such that higher parent–child neural synchrony was associated with a more rapid decrease in internalizing behaviors. Our results suggest that a parent–child dyad's ability to coordinate neural activation during positive interactions might serve as a protective mechanism in the context of internalizing behaviors.


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