Results 31 to 40 of about 53,027 (281)

Differential activation of anatomically defined neuronal subpopulations in the amygdala during fear conditioning and extinction [PDF]

open access: yes, 2009
The amygdala is a key structure of the neuronal circuitry mediating expression and extinction of conditioned fear. However, fear memories are thought to be encoded in a larger network comprising the medial prefrontal cortex (mPFC) and the ...
Senn, Verena
core   +1 more source

Ultrahigh Extinction Ratio Long‐Wave Infrared Polarization‐Selective Broadband Metamaterial Absorber

open access: yesAdvanced Photonics Research, 2023
Metamaterial absorbers (MAs) provide new miniaturization, integration, and high‐performance solution for infrared polarization imaging systems.
Zheng Qin   +9 more
doaj   +1 more source

Crossing the midline: reducing attentional deficits via interhemispheric interactions [PDF]

open access: yes, 2005
Patients with unilateral neglect and extinction show a profound lack of awareness of stimuli presented contralateral to their lesion. However, many processes of perception are intact and contralesional stimuli seem to reach a high level of representation,
Brooks, JL   +5 more
core   +1 more source

No mass extinction for land plants at the Permian–Triassic transition

open access: yesNature Communications, 2019
It has been thought that land plants suffered a mass extinction along with animals at the end of the Permian. Here, Nowak et al. show that the apparent plant mass extinction is a result of biases in the fossil record and their reanalysis suggests a lower
Hendrik Nowak   +2 more
doaj   +1 more source

Systemic Cellular Activation Mapping of an Extinction-Impaired Animal Model

open access: yesFrontiers in Cellular Neuroscience, 2019
Fear extinction diminishes conditioned fear responses and impaired fear extinction has been reported to be related to anxiety disorders such as post-traumatic stress disorder (PTSD).
Kwanghoon Park, ChiHye Chung
doaj   +1 more source

Self-extinction through optimizing selection

open access: yesJournal of Theoretical Biology, 2013
Evolutionary suicide is a process in which selection drives a viable population to extinction. So far, such selection-driven self-extinction has been demonstrated in models with frequency-dependent selection. This is not surprising, since frequency-dependent selection can disconnect individual-level and population-level interests through environmental ...
Parvinen, K., Dieckmann, U.
openaire   +4 more sources

SpeX Near-infrared Spectroscopic Extinction Curves in the Milky Way

open access: yesThe Astrophysical Journal, 2022
Interstellar dust extinction curves provide valuable information about dust properties, including the composition and size of the dust grains, and are essential to correct observations for the effects of interstellar dust.
Marjorie Decleir   +9 more
doaj   +1 more source

Relaxation of selective constraints causes independent selenoprotein extinction in insect genomes. [PDF]

open access: yesPLoS ONE, 2008
BACKGROUND: Selenoproteins are a diverse family of proteins notable for the presence of the 21st amino acid, selenocysteine. Until very recently, all metazoan genomes investigated encoded selenoproteins, and these proteins had therefore been believed to ...
Charles E Chapple, Roderic Guigó
doaj   +1 more source

Extinction of cue-evoked drug-seeking relies on degrading hierarchical instrumental expectancies

open access: yes, 2014
There has long been need for a behavioural intervention that attenuates cue-evoked drug-seeking, but the optimal method remains obscure. To address this, we report three approaches to extinguish cue-evoked drug-seeking measured in a Pavlovian to ...
Rose, Abigail K.   +32 more
core   +1 more source

Starvation and Climate Change—How to Constrain Cancer Cell Epigenetic Diversity and Adaptability to Enhance Treatment Efficacy

open access: yesFrontiers in Ecology and Evolution, 2021
Advanced metastatic cancer is currently not curable and the major barrier to eliminating the disease in patients is the resistance of subpopulations of tumor cells to drug treatments.
Christopher Gregg, Christopher Gregg
doaj   +1 more source

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