Rate remapping is a conjunctive code that potentially enables hippocampal place cells to jointly represent spatial and nonspatial information. In this issue of Neuron, Rennó-Costa et al. introduce a theoretical model wherein the convergence of the medial and lateral entorhinal excitatory inputs, combined with local inhibition, explains hippocampal rate remapping.

Rational analyses of memory suggest that retrievability of past experience depends on its usefulness for predicting the future: memory is adapted to the temporal structure of the environment. Recent research has enriched this view by applying it to semantic memory and reinforcement learning. This paper describes how multiple forms of memory can be linked via common predictive principles, possib...

We report the spatial and temporal properties of a class of cells termed theta-modulated place-by-direction (TPD) cells recorded from the presubicular and parasubicular cortices of the rat. The firing characteristics of TPD cells in open-field enclosures were compared with those of the following two other well characterized cell classes in the hippocampal formation: place and head-direction cel...

OBJECTIVE To describe the infant feeding practices and attitudes of women who used prevention of mother-to-child transmission of HIV (PMTCT) services in rural Zimbabwe. DESIGN A cross-sectional study including structured interviews and focus group discussions was conducted between June 2003 and February 2004. SETTING The study took place in Murambinda Mission Hospital (Buhera District, Mani...

Aims: This study aims to provide in-depth knowledge of current infant feeding practices in order to create an evidence base and develop well-targeted strategies to reduce the prevalence of child malnutrition. Study Design: This study is designed by using a descriptive cross-sectional survey. Place and Duration of Study: This study was carried out in two rural districts, Bopa and Original Resear...

OBJECTIVE Nursing homes are increasingly the place where many Americans die. Thus, advance directives are critical to the preservation of the autonomous wishes at end-of-life. The purpose of this paper is to determine if preferences for artificial nutrition, as stated in the advance directives of nursing home residents, are honored in the last 2 months of life. DESIGN Secondary analysis. SE...

Busk, Morten, Frank B. Jensen, and Tobias Wang. Effects of feeding on metabolism, gas transport, and acid-base balance in the bullfrog Rana catesbeiana. Am. J. Physiol. Regulatory Integrative Comp. Physiol. 278: R185–R195, 2000.—Massive feeding in ectothermic vertebrates causes changes in metabolism and acid-base and respiratory parameters. Most investigations have focused on only one aspect of...

The brain's grid and place cells, which contribute to spatial representations of the external environment, are thought to be modulated by the hyperpolarization-activated cation current (I(h)). Giocomo et al. and Hussaini et al. now provide new insights into these cells' unique activity patterns by studying transgenic mice lacking I(h).