scholarly journals The role of prelimbic and anterior cingulate cortices in fear memory reconsolidation and persistence depends on the memory age

2020 ◽  
Vol 27 (8) ◽  
pp. 292-300
Author(s):  
Thiago Rodrigues da Silva ◽  
Jeferson Machado Batista Sohn ◽  
Roberto Andreatini ◽  
Cristina Aparecida Stern
Keyword(s):  
Fear Memory ◽  
Anterior Cingulate ◽  
Memory Reconsolidation

Better, worse, or different than expected - On the role of value and identity prediction errors in fear memory reactivation

2021 ◽  
Author(s):  
Anna Gerlicher ◽  
Merel Kindt ◽  
Sjoerd A Verweij
Keyword(s):  
Adrenergic Receptors ◽  
Fear Memory ◽  
Memory Reconsolidation ◽  
Control Group ◽  
Prediction Errors ◽  
Future Directions ◽  
Memory Reactivation ◽  
A Value ◽  
Propranolol Hcl

Although reconsolidation-based interventions constitute a promising new avenue to treating fear and anxieties disorders, the success of the intervention is not guaranteed. The initiation of memory reconsolidation is dependent on whether a mismatch between the experienced and predicted outcome – a prediction error (PE) – occurs during fear memory reactivation. It remains, however, elusive whether any type of PE renders fear memories susceptible to reconsolidation disruption. Here, we investigated whether a value PE, elicited by an outcome that is better or worse than expected, is necessary to make fear memories susceptible to reconsolidation disruption or whether a model-based identity PE, i.e., a PE elicited by an outcome equally aversive but different than expected, would be sufficient. Blocking beta-adrenergic receptors with propranolol HCl after reactivation did, however, not reduce the expression of fear after either type of PE. Instead, we observed intact fear memory expression 24h after reactivation in the value-, identity- and a no-PE control group. The present results do not corroborate our earlier findings of reconsolidation disruption and point towards challenges that the field is currently facing in observing evidence for memory reconsolidation at all. We provide potential explanations for the unexpected failure of replicating reconsolidation disruption and discuss future directions.

scholarly journals Role of prelimbic cortex PKC and PKMζ in fear memory reconsolidation and persistence following reactivation

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Thiago Rodrigues da Silva ◽  
Ana Maria Raymundi ◽  
Leandro José Bertoglio ◽  
Roberto Andreatini ◽  
Cristina A. Stern
Keyword(s):  
Fear Memory ◽  
Memory Reconsolidation ◽  
Prelimbic Cortex

scholarly journals Environmental enrichment prevents the late effect of acute stress-induced fear extinction deficit: the role of hippocampal AMPA-GluA1 phosphorylation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Leonardo Santana Novaes ◽  
Letícia Morais Bueno-de-Camargo ◽  
Carolina Demarchi Munhoz
Keyword(s):  
Environmental Enrichment ◽  
Basolateral Amygdala ◽  
Acute Stress ◽  
Fear Memory ◽  
Fear Extinction ◽  
Post Traumatic Stress ◽  
Related Disorder ◽  
Memory Extinction ◽  
Post Traumatic

AbstractThe persistence of anxiety and the deficit of fear memory extinction are both phenomena related to the symptoms of a trauma-related disorder, such as post-traumatic stress disorder (PTSD). Recently we have shown that single acute restraint stress (2 h) in rats induces a late anxiety-related behavior (observed ten days after stress), whereas, in the present work, we found that the same stress impaired fear extinction in animals conditioned ten days after stress. Fourteen days of environmental enrichment (EE) prevented the deleterious effect of stress on fear memory extinction. Additionally, we observed that EE prevented the stress-induced increase in AMPA receptor GluA1 subunit phosphorylation in the hippocampus, but not in the basolateral amygdala complex and the frontal cortex, indicating a potential mechanism by which it exerts its protective effect against the stress-induced behavioral outcome.

scholarly journals Psychobiological risk factors for suicidal thoughts and behaviors in adolescence: a consideration of the role of puberty

2021 ◽  
Author(s):  
Tiffany C. Ho ◽  
Anthony J. Gifuni ◽  
Ian H. Gotlib
Keyword(s):  
Pubertal Timing ◽  
Anterior Cingulate ◽  
Neural Systems ◽  
Hormonal Changes ◽  
Suicidal Thoughts ◽  
Social Stressors ◽  
And Behaviors ◽  
Suicidal Thoughts And Behaviors ◽  
Pubertal Transition

AbstractSuicide is the second leading cause of death among adolescents. While clinicians and researchers have begun to recognize the importance of considering multidimensional factors in understanding risk for suicidal thoughts and behaviors (STBs) during this developmental period, the role of puberty has been largely ignored. In this review, we contend that the hormonal events that occur during puberty have significant effects on the organization and development of brain systems implicated in the regulation of social stressors, including amygdala, hippocampus, striatum, medial prefrontal cortex, orbitofrontal cortex, and anterior cingulate cortex. Guided by previous experimental work in adults, we also propose that the influence of pubertal hormones and social stressors on neural systems related to risk for STBs is especially critical to consider in adolescents with a neurobiological sensitivity to hormonal changes. Furthermore, facets of the pubertal transition, such as pubertal timing, warrant deeper investigation and may help us gain a more comprehensive understanding of sex differences in the neurobiological and psychosocial mechanisms underlying adolescent STBs. Ultimately, advancing our understanding of the pubertal processes that contribute to suicide risk will improve early detection and facilitate the development of more effective, sex-specific, psychiatric interventions for adolescents.

scholarly journals Dispositional empathy predicts primary somatosensory cortex activity while receiving touch by a hand

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Michael Schaefer ◽  
Anja Kühnel ◽  
Franziska Rumpel ◽  
Matti Gärtner
Keyword(s):  
Somatosensory Cortex ◽  
Anterior Cingulate ◽  
Primary Somatosensory Cortex ◽  
Rubber Hand ◽  
Somatosensory Cortices ◽  
Touch Perception ◽  
Trait Empathy ◽  
Human Perceptions ◽  
Dispositional Empathy

AbstractPrevious research revealed an active network of brain areas such as insula and anterior cingulate cortex when witnessing somebody else in pain and feeling empathy. But numerous studies also suggested a role of the somatosensory cortices for state and trait empathy. While recent studies highlight the role of the observer’s primary somatosensory cortex when seeing painful or nonpainful touch, the interaction of somatosensory cortex activity with empathy when receiving touch on the own body is unknown. The current study examines the relationship of touch related somatosensory cortex activity with dispositional empathy by employing an fMRI approach. Participants were touched on the palm of the hand either by the hand of an experimenter or by a rubber hand. We found that the BOLD responses in the primary somatosensory cortex were associated with empathy personality traits personal distress and perspective taking. This relationship was observed when participants were touched both with the experimenter’s real hand or a rubber hand. What is the reason for this link between touch perception and trait empathy? We argue that more empathic individuals may express stronger attention both to other’s human perceptions as well as to the own sensations. In this way, higher dispositional empathy levels might enhance tactile processing by top-down processes. We discuss possible implications of these findings.

scholarly journals Role of the Anterior Cingulate Cortex in Translational Pain Research

2021 ◽  
Vol 37 (3) ◽  
pp. 405-422
Author(s):  
Xiao Xiao ◽  
Ming Ding ◽  
Yu-Qiu Zhang
Keyword(s):  
Anterior Cingulate Cortex ◽  
Cingulate Cortex ◽  
Anterior Cingulate ◽  
Pain Research
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