Catálogo de publicaciones - revistas

<jats:p> Astafiev <jats:italic>et al</jats:italic> . question whether the blood oxygen level–dependent (BOLD) response that we reported in the brainstem was located in the locus coeruleus (LC). Using high-resolution T1-turbo spin echo images (T1-TSE) acquired in an independent group of subjects, we show that the reported task-related BOLD response in the brainstem is actually compatible with the anatomical location of the LC. </jats:p>

<jats:p> Minzenberg <jats:italic>et al</jats:italic> . (Reports, 12 December 2008, p. 1700) and Schmidt <jats:italic>et al</jats:italic> . (Reports, 24 April 2009, p. 516) reported blood oxygen level–dependent (BOLD) responses in the human locus coeruleus (LC). Here, we show that these LC responses do not correspond to the anatomical location of the LC and present cautionary data concerning the quality of BOLD signals measured from the LC using standard functional magnetic resonance imaging acquisition parameters. </jats:p>

<jats:p> Contrary to the arguments put forth by Astafiev <jats:italic>et al</jats:italic> ., our new analyses and high-resolution replication show that modulation of brain activity by the cognitive enhancing drug modafinil indeed localizes to the locus coeruleus. The authors’ critical stance regarding blood oxygen level–dependent imaging in the brainstem does not follow from their data. </jats:p>

<jats:p>Contributors discuss theoretical and empirical perspectives on the fate of animal and plant groups in which sexual reproduction has been lost.</jats:p>

<jats:p> A <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="http://www.sciencemag.org/feature/data/books/brl5976.dtl">listing of books received</jats:ext-link> at <jats:italic>Science</jats:italic> during the week ended 09 April 2010. </jats:p>

<jats:p>Wilson surveys contemporary work from around the world that draws on molecular biology, kinetics, robotics, physics, information technology, living systems, and other laboratory research.</jats:p>

<jats:p>A major new approach to emissions mitigation may interrupt a promising trend toward decentralized forest management.</jats:p>

<jats:p> An enzyme that cleaves RNA is converted to a DNA-cleaving enzyme during programmed cell death in <jats:italic>Caenorhabditis elegans</jats:italic> . </jats:p>

<jats:p>A durable molecular catalyst for water oxidation has been made from readily available and relatively inexpensive materials.</jats:p>

<jats:p>Where has the energy from global warming gone?</jats:p>