Many animals, on air, water, or land, navigate in three-dimensional (3D) environments, yet it remains unclear how brain circuits encode the animal's 3D position. We recorded single neurons in freely flying bats, using a wireless neural-telemetry system, and studied how hippocampal place cells encode 3D volumetric space during flight. Individual place cells were active in confined 3D volumes, an...

Abstract Background Through the health extension package, Ethiopia had practiced infant and young child feeding. However, feeding (IYCF) practice has been poor. Hence, in this study, knowledge, attitude, of mothers/caregivers on were assessed. Methods A cross-sectional study was carried out among 486 from Assosa Districts Zone Benshangul Gumuz Region, Western Ethiopia. semi-structured interview...

conclusions the prevalence of predominant breastfeeding during the first month postpartum is high in shahroud. interventions to strengthen adherence to who guidelines for breastfeeding should be considered. breastfeeding education providers at the hospitals should emphasize the effects of formula on breastfeeding continuation at early postpartum. background the introduction of fluids to infants...

objective about 1 % of infants are of very low birth weight. however, they comprise about 50% of infant mortality. we compare the effects of continuous versus intermittent feeding on physical growth, gastrointestinal tolerance and macronutrient retention in low birth weight infants (methods a prospective randomized trial clinical trial was performed from 2004-2005. very low birth weight neonate...

Accurate spatial localization requires a mechanism that corrects for errors, which might arise from inaccurate sensory information or neuronal noise. In this paper, we propose that Hippocampal place cells might implement such an error correction mechanism by integrating different sources of information in an approximately Bayes-optimal fashion. We compare the predictions of our model with physi...

Hippocampal place cells fire at different rates when a rodent runs through a given location on its way to different destinations. However, it is unclear whether such firing represents the animal's intended destination or the execution of a specific trajectory. To distinguish between these possibilities, Lister Hooded rats (n = 8) were trained to navigate from a start box to three goal locations...

Land change science has demonstrated that rural livelihoods around the world both drive and reflect changing environmental regimes and political economic/ structural transformations. This article explores the relationship between increasingly globalized rural livelihoods and in-place land change, assessing results from social surveys of smallholding households in the southern Yucatán region. We...

The idea that the rat hippocampus stores a map of space is based on the existence of "place cells" that show "location-specific" firing. The discharge of place cells is confined with remarkable precision to a cell-specific part of the environment called the cell's "firing field." We demonstrate here that firing is not nearly as reliable in the time domain as in the positional domain. Discharge ...

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The spatial mapping theory of hippocampal function proposes that the rat hippocampus is specialized for navigational computations, computations that allow the animal to solve difficult spatial problems. In this paper, we review evidence obtained by recording place cells and other "spatially tuned" cells from freely moving rats. Our main conclusion is that the nature of the signals carried by th...