نتایج جستجو برای: down areas

تعداد نتایج: 602557  

Journal: :Revista de biologia tropical 2011
Héctor Nava M Teresa Ramírez-Herrera

Marine and terrestrial ecosystems are declining globally due to environmental degradation and poorly planned resource use. Traditionally, local government agencies have been responsible of the management of natural reserves to preserve biodiversity. Nonetheless, much of these approaches have failed, suggesting the development of more integrative strategies. In order to discuss the importance of...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2006
Per E Roland Akitoshi Hanazawa Calle Undeman David Eriksson Tamas Tompa Hiroyuki Nakamura Sonata Valentiniene Bashir Ahmed

Despite the lack of direct evidence, it is generally believed that top-down signals are mediated by the abundant feedback connections from higher- to lower-order sensory areas. Here we provide direct evidence for a top-down mechanism. We stained the visual cortex of the ferret with a voltage-sensitive dye and presented a short-duration contrast square. This elicited an initial feedforward and l...

2007
Abby N. Powell

The coastal beach-dune ecosystem in California supports two federally listed threatened or endangered species: California least tern (Sterna antillarum browni) and western snowy plover (Charadrius alexandrinus nivosus). This ecosystem has become highly stressed due to shoreline development, invasion of exotic plants, beach stabilization, and heavy recreational use. Least tern populations have i...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2012
Taihei Ninomiya Hiromasa Sawamura Ken-Ichi Inoue Masahiko Takada

The bottom-up processing of visual information is strongly influenced by top-down signals, at least part of which is thought to be conveyed from the frontal cortex through the frontal eye field (FEF) and the lateral intraparietal area (LIP). Here we investigated the architecture of multisynaptic pathways from the frontal cortex to the middle temporal area (MT) of the dorsal visual stream and vi...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2011
Saskia Haegens Barbara F Händel Ole Jensen

The brain receives a rich flow of information which must be processed according to behavioral relevance. How is the state of the sensory system adjusted to up- or downregulate processing according to anticipation? We used magnetoencephalography to investigate whether prestimulus alpha band activity (8-14 Hz) reflects allocation of attentional resources in the human somatosensory system. Subject...

Journal: :Vision Research 2010
Christina Rizzi Fabrizio Piras Paola Marangolo

We present a patient, who, following a right posterior ischemia, showed a selective deficit in visually recognising pictures, objects and faces. She was able to read and comprehend any kind of written material and could recognise letters and numbers. Her inability to recognise pictures did not arise from a deficit at the structural description level and/or from a poor semantic knowledge of the ...

2013
Yoshifumi Ueta Yasuharu Hirai Takeshi Otsuka Yasuo Kawaguchi

The frontal cortex plays an important role in the initiation and execution of movements via widespread projections to various cortical and subcortical areas. Layer 2/3 (L2/3) pyramidal cells in the frontal cortex send axons mainly to other ipsilateral/contralateral cortical areas. Subpopulations of layer 5 (L5) pyramidal cells that selectively project to the pontine nuclei or to the contralater...

Journal: :journal of paramedical sciences 0
farahnaz fatemi naeini skin diseases and leishmaniasis research center, department of dermatology, isfahan university of medical sciences, isfahan, iran. bahareh abtahi naeini skin diseases and leishmaniasis research center, department of dermatology, isfahan university of medical sciences, isfahan, iran. hamidreza sadeghiyan students’ research committee, isfahan university of medical sciences, isfahan, iran . mohsen pourazizi students’ research committee, semnan university of medical sciences, semnan, iran.

keratoderma is a group of disorders characterized by abnormal thickening of skin. acquired palmar keratoderma has many underlying causes. the association of thyroid disease and palmar keratoderma rarely reported. hypothyroidism, although very rare association, must be suspected in patients with acquired ppk, particularly when it occurs in setting of systemic symptoms or predisposing conditions....

Journal: :archives of clinical infectious diseases 0
fariba fayaz infectious diseases and tropical medicine research center, shahid beheshti university of medical sciences, tehran, ir iran; department of microbiology, faculty of medicine, shahid beheshti university of medical sciences, tehran, ir iran; infectious diseases and tropical medicine research center, shahid beheshti university of medical sciences, tehran, ir iran. tel: +98-2122439963-8, fax: +98-2122439964 latif gachkar infectious diseases and tropical medicine research center, shahid beheshti university of medical sciences, tehran, ir iran sara rahmati roodsari infectious diseases and tropical medicine research center, shahid beheshti university of medical sciences, tehran, ir iran bita pourkaveh infectious diseases and tropical medicine research center, shahid beheshti university of medical sciences, tehran, ir iran

conclusions the current study indicated that h. pylori infection occurs at a higher rate in patients with down syndrome and mental retardation. this may provide more reasons to control the transmission of h. pylori among them. results the differences between the groups were compared by t-test and x2 test. seropositivity for h. pylori was significantly higher in patients with down syndrome and m...

2004
Rachel Lloyd Ann Harding

Regional policy makers and researchers or national policy makers concerned with the regional impact of their decisions rely on the availability of detailed and current small area data to inform their decision making. However, in the past it has been difficult to assess income levels and inequality, wealth, poverty, disadvantage and other socio-economic characteristics at a detailed regional lev...

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