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Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Critical Care giúp cho các bạn có thêm kiến thức về ngành y học đề tài: Bilateral olfaction: two is better than one for navigation. | Minireview Bilateral olfaction two is better than one for navigation Baranidharan Raman lori Ito and Mark Stopfer Addresses National Institute of Child Health and Human Development NIH Lincoln Drive Bethesda MD 20892 USA. National Institute of Standards and Technology Gaithersburg MD 20899 USA. Correspondence Mark Stopfer. Email stopferm@mail.nih.gov Published 31 March 2008 Genome Biology 2008 9 212 doi 10.1186 gb-2008-9-3-212 The electronic version of this article is the complete one and can be found online at http genomebiology.com 2008 9 3 212 2008 BioMed Central Ltd Abstract Do animals require bilateral input to track odors A recent study reveals that fruit fly larvae can localize odor sources using unilateral inputs from a single functional sensory neuron but that an enhanced signal-to-noise ratio provided by dual inputs is helpful in more challenging environments. Biological sensory systems often make use of asymmetries in sensory inputs to extract information about the environment. The visual system for example exploits disparities in the two-dimensional images obtained from the left and the right eyes to extract information about depth 1 . The auditory system uses the phase and intensity differences of stereo inputs to localize sound sources 2 . Relatively little is known about the importance of bilateral inputs in olfaction. Our own noses feature twin nostrils insects have paired antennae. What advantages do such configurations provide A recent study by Louis and colleagues 3 examined the significance of paired inputs for odor navigation in an animal offering numerous experimental advantages the larva of the fruit fly Drosophila melanogaster. Studying how animals carry out chemotaxis that is how they navigate through chemical gradients requires careful behavioral assays conducted within well-controlled spatial distributions of chemicals. In the case of olfaction it is a significant technical challenge to generate the stable odor gradients needed for such a
