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Frontiers news briefs: 27 June
Date:6/28/2013

uvers at high speed. But because they are small, they are easily blown off course, and must correct their heading using tiny brains with limited neural resources. When moving forward, images of distant objects travel across the retina more slowly than nearby ones. This geometrical effect, called motion parallax, informs us if we run through the forest that the hovering moon is far off, and that the tree branches whizzing by are near and must be dodged. To determine if flies use motion parallax for corrective flight maneuvers, Stephanie Cabrera and Jamie Theobald, of Florida International University, used a cube with images on the sides to simulate three dimensional forward flight for a fruitfly that was held in place in the cube's center. They found that fruitflies responded more strongly to images that, by virtue of speed, appeared closer. But the crucial variable wasn't absolute speed; it was that some images moved faster than others. These results suggest that tiny fly brains use geometrical clues to identify the closest objects during flight.

Researcher contact:

Prof. Jamie Theobald
Department of Biological Sciences
Florida International University, USA
E-mail: theobald@fiu.edu

URL: http://www.frontiersin.org/Behavioral_Neuroscience/10.3389/fnbeh.2013.00076/abstract


Frontiers in Human Neuroscience

Clustering the lexicon in the brain: a meta‑analysis of the neurofunctional evidence on noun and verb processing

Virtually every known human language features two different classes of words, one for "calling" things like dogs, clouds, or rumours and one for saying something about how they are or what they do dogs bark, clouds are coming, rumours spread. These classes are called nouns and verbs in Western languages,
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Contact: Gozde Zorlu
gozde.zorlu@frontiersin.org
Frontiers
Source:Eurekalert

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