نتایج جستجو برای: Freezing behavior

تعداد نتایج: 635614  

Masumeh Foroutan, Seyed Mahmood Fatemi

 We performed molecular dynamics simulations using the coarse-grained model to study the freezing behavior of pure water and 14% water-salt mixture in a wide range of temperatures for a very long time around 50 nanoseconds. For the salty water, an interface in nanoscale was used. For both systems, the f...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2016
seyed mahmood fatemi masumeh foroutan

we performed molecular dynamics simulations using the coarse-grained model to study the freezing behavior of pure water and 14% water-salt mixture in a wide range of temperatures for a very long time around 50 nanoseconds. for the salty water, an interface in nanoscale was used. for both systems, the freezing behavior of water molecules was studied using some qualities such as density, total en...

Journal: :Journal of experimental psychology. Animal behavior processes 1989
G S Borszcz J Cranney R N Leaton

The relation between long-term decrements of the acoustic startle response in rats and the development of freezing behavior during habituation training was examined. Freezing behavior developed over the initial trials of habituation training, and the rate of long-term response decrements was found to be inversely related to the development of freezing. Manipulations (neurological or behavioral)...

2016
Andrew J Rennekamp Xi-Ping Huang You Wang Samir Patel Paul J Lorello Lindsay Cade Andrew P W Gonzales Jing-Ruey Joanna Yeh Barbara J Caldarone Bryan L Roth David Kokel Randall T Peterson

Humans and many animals show 'freezing' behavior in response to threatening stimuli. In humans, inappropriate threat responses are fundamental characteristics of several mental illnesses. To identify small molecules that modulate threat responses, we developed a high-throughput behavioral assay in zebrafish (Danio rerio) and evaluated 10,000 compounds for their effects on freezing behavior. We ...

2001
Stephen Maren

Considerable evidence indicates an important role for amygdaloid nuclei in both the acquisition and expression of Pavlovian fear conditioning. Recent reports from my laboratory have focused on the impact of neurotoxic lesions of the basolateral complex of the amygdala (BLA) on conditional freezing behavior in rats. In these studies, I have observed severe effects of posttraining BLA lesions on ...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2001
K J Wallace J B Rosen

Considerable evidence suggests that the lateral (LA) and basal (BA) nuclei of the amygdala are sites of plasticity and storage of emotional memory. Recent arguments, however, have seriously challenged this view, suggesting that the effects of amygdala lesions are attributable to interference with performance of fear behavior and not learning and memory. One way to address this controversy is to...

Journal: :American journal of physiology. Regulatory, integrative and comparative physiology 2010
Misa Yoshimoto Keiko Nagata Kenju Miki

The present study was designed to document changes in sympathetic nerve activity and cardiovascular function when conscious rats were challenged with a noise stressor to induce freezing behavior. The potential contribution of the arterial baroreceptors in regulating sympathetic nerve activity and cardiovascular adjustments during the freezing behavior was then examined. Wistar male rats were as...

2017
Iro Fragkaki Karin Roelofs John Stins Ruud A. Jongedijk Muriel A. Hagenaars

Besides fight and flight responses, animals and humans may respond to threat with freezing, a response characterized by bradycardia and physical immobility. Risk assessment is proposed to be enhanced during freezing to promote optimal decision making. Indeed, healthy participants showed freezing-like responses to threat cues. Posttraumatic stress disorder (PTSD) patients are characterized by hy...

2013
Haruna Tomizawa Daisuke Matsuzawa Shingo Matsuda Daisuke Ishii Chihiro Sutoh Eiji Shimizu

Social interaction is known to alter behavior and emotional responses to various events. It has been reported that when fear-conditioned animals are put in a fear extinction paradigm with non-fearful conspecifics (pair-exposure), freezing behavior decreases compared to a solitary situation. However, it remains unclear whether pair-exposure during fear extinction is persistently effective in red...

2011
Piray Atsak Marie Orre Petra Bakker Leonardo Cerliani Benno Roozendaal Valeria Gazzola Marta Moita Christian Keysers

The study of the neural basis of emotional empathy has received a surge of interest in recent years but mostly employing human neuroimaging. A simpler animal model would pave the way for systematic single cell recordings and invasive manipulations of the brain regions implicated in empathy. Recent evidence has been put forward for the existence of empathy in rodents. In this study, we describe ...

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