Behavioral adaptation to potential threats requires both a global representation of danger to prepare the organism to react in a timely manner but also the identification of specific threatening situations to select the appropriate behavioral responses. The prefrontal cortex is known to control threat-related behaviors, yet it is unknown whether it encodes global defensive states and/or the identity of specific threatening encounters. Using a new behavioral paradigm that exposes mice to different threatening situations, we show that the dorsomedial prefrontal cortex (dmPFC) encodes a general representation of danger while simultaneously encoding a specific neuronal representation of each threat. Importantly, the global representation of danger persisted in error trials that instead lacked specific threat identity representations. Consistently, optogenetic prefrontal inhibition impaired overall behavioral performance and discrimination of different threatening situations without any bias toward active or passive behaviors. Together, these data indicate that the prefrontal cortex encodes both a global representation of danger and specific representations of threat identity to control the selection of defensive behaviors.
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http://dx.doi.org/10.1038/s41593-023-01472-8 | DOI Listing |
BMC Microbiol
January 2025
Central Research Institute of Epidemiology, Novogireevskaya Str., 3a, Moscow, 111123, Russia.
Background: The infections of bacterial origin represent a significant problem to the public healthcare worldwide both in clinical and community settings. Recent decade was marked by limiting treatment options for bacterial infections due to growing antimicrobial resistance (AMR) acquired and transferred by various bacterial species, especially the ones causing healthcare-associated infections, which has become a dangerous issue noticed by the World Health Organization. Numerous reports shown that the spread of AMR is often driven by several species-specific lineages usually called the 'global clones of high risk'.
View Article and Find Full Text PDFEcotoxicol Environ Saf
December 2024
Department of Clinical Laboratory, No.906 Hospital of People's Liberation Army, Ningbo, China.
In this experiment, we employed Real-time PCR(RT-PCR) and metagenomic Next-Generation Sequencing (mNGS) techniques to detect the presence of Norovirus, Rotavirus Group A, Adenovirus Group F, and Astrovirus in untreated sewage from three major hospitals. A comparison with clinical lab test outcomes revealed Norovirus as having the highest infection rate, followed by Adenovirus Group F and Rotavirus Group A. Despite not testing for Astrovirus in clinical labs, its sewage detection rate was surpassed only by Norovirus, suggesting a potentially high clinical infection rate.
View Article and Find Full Text PDFJ Aging Stud
December 2024
Department of Culture and Media Studies, Umeå University, 901 87 Umeå, Sweden. Electronic address:
In recent years, a relatively large number of articles in the Swedish media have reported on the problems that afflict nursing homes due to prolonged and climate-related heatwaves during the summer months. Older residents are badly affected by the heat, especially as many nursing homes in Sweden lack air conditioning. This paper aims to explore how nursing homes are depicted in the Swedish press in relation to climate-related heatwaves, professional care, and risk management.
View Article and Find Full Text PDFVocal communication in social animals involves the production and perception of various calls that ethologists categorize into call-types, based on their acoustical structure and the behavioral context of production. Whether animals perceive these categories and associate distinct meanings to them remains unknown. The zebra finch, a gregarious songbird, uses approximately 11 call-types to communicate hunger, danger, social conflict, and establish social contact and bonding.
View Article and Find Full Text PDFSurvival in dynamic environments requires that organisms learn to predict danger from situational cues. One key facet of threat prediction is generalization from a predictive cue to similar cues, ensuring that a cue-outcome contingency is applied beyond the original learning environment. Generalization has been observed in laboratory studies of aversive conditioning: Behavioral and physiological processes generalize responses from a stimulus paired with threat (the conditioned stimulus [CS+]) to unpaired stimuli, with response magnitudes varying with CS+ similarity.
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