نتایج جستجو برای: ear extinction

تعداد نتایج: 65668  

2009
HUI CHEN

The human ear is a new class of relatively stable biometrics. After decades of research of anthropometric measurements of ear photographs of thousands of people, it has been found that no two ears are alike, even in the cases of identical and fraternal twins, triplets, and quadruplets [1]. It is also found that the structure of the ear does not change radically over time. Ear biometric has play...

2006
F. C. KLEBANER

We give explicit formulae for most likely paths to extinction in simple branching models when initial population is large. In discrete time, we study the Galton-Watson process, and in continuous time, the branching diffusion. Themost likely paths are found with the help of the large deviation principle (LDP). We also find asymptotics for the extinction probability, which gives a new expression ...

Journal: :Science 2009
Arnold I Miller Michael Foote

Environmental perturbations during mass extinctions were likely manifested differently in epicontinental seas than in open-ocean-facing habitats of comparable depth. Here, we present a dissection of origination and extinction in epicontinental seas versus open-ocean-facing coastal regions in the Permian through Cretaceous periods, an interval through which both settings are well represented in ...

2015
Wilfred Muteweye Godfrey I. Muguti

BACKGROUND Prominent ear is the most common congenital ear deformity affecting 5% of children in the Western world and has profound psychosocial effects on the bearer. It is important to know the prevalence in the local population to have a better appreciation of the local burden of the abnormality as well as to know the parameters of ear morphology locally. These parameters can be useful in th...

2009
David C. Riccio James F. Briggs

An experiment using rats investigated whether retrieval cues for an extinction memory could also be brought under the control of cues not physically present during extinction learning. Following the extinction of a fear motivated task in a context different from original learning, rats were exposed to the training context either immediately, 30 min, or 60 min after extinction. When tested back ...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2010
Nigel Whittle Markus Hauschild Gert Lubec Andrew Holmes Nicolas Singewald

Fear extinction is impaired in neuropsychiatric disorders, including posttraumatic stress disorder. Identifying drugs that facilitate fear extinction in animal models provides leads for novel pharmacological treatments for these disorders. Zinc (Zn) is expressed in neurons in a cortico-amygdala circuit mediating fear extinction, and modulates neurotransmitter systems regulating extinction. We p...

2016
Simone B. Sartori Verena Maurer Conor Murphy Claudia Schmuckermair Patrick Muigg Inga D. Neumann Nigel Whittle Nicolas Singewald

BACKGROUND Despite its success in treating specific anxiety disorders, the effect of exposure therapy is limited by problems with tolerability, treatment resistance, and fear relapse after initial response. The identification of novel drug targets facilitating fear extinction in clinically relevant animal models may guide improved treatment strategies for these disorders in terms of efficacy, a...

Journal: :Learning & memory 2012
Kathryn D Baker Gavan P McNally Rick Richardson

The NMDA receptor partial agonist d-cycloserine (DCS) enhances the extinction of learned fear in rats and exposure therapy in humans with anxiety disorders. Despite these benefits, little is known about the mechanisms by which DCS promotes the loss of fear. The present study examined whether DCS augments extinction retention (1) through reductions in conditioned stimulus (CS) processing or (2) ...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2006
Jonathan L C Lee Amy L Milton Barry J Everitt

NMDA receptors are important for the acquisition, reconsolidation, and extinction of memories. NMDA receptor antagonists impair these memory processes, whereas the partial agonist D-cycloserine (DCS) potentiates both learning and extinction. Here, we used DCS and the noncompetitive NMDA receptor antagonist (+)-5-methyl-10,11-dihydro-SH-dibenzo[a,d]cyclohepten-5,10-imine maleate (MK-801) to inve...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2014
Jian Xin Ling Ma Tian-Yi Zhang Hui Yu Yue Wang Liang Kong Zhe-Yu Chen

Brain-derived neurotrophic factor (BDNF) and its receptor, tropomyosin-related kinase receptor B (TrkB), play a critical role in memory extinction. However, the detailed role of BDNF in memory extinction on the basis of neural circuit has not been fully understood. Here, we aim to investigate the role of BDNF signaling circuit in mediating conditioned taste aversion (CTA) memory extinction of t...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید