Mushroom bodies modulate salience-based selective fixation behavior in Drosophila

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	Mushroom bodies modulate salience-based selective fixation behavior in Drosophila
	Xi, Wang ; Peng, Yueqing ; Guo, Jianzeng ; Ye, Yizhou ; Zhang, Ke ; Yu, Feng ; Guo, Aike
刊名	EUROPEAN JOURNAL OF NEUROSCIENCE
	2008
卷号	27 期号:6 页码:1441-1451
关键词	behavioral neuroscience Drosophila melanogaster fixation flight simulator mushroom bodies VISUAL-ATTENTION BRAIN ACTIVITY MELANOGASTER NEURONS MEMORY ORIENTATION PERCEPTION MECHANISMS EXPRESSION SHIBIRE
ISSN号	0953-816X
通讯作者	Guo, AK (reprint author), Chinese Acad Sci, Shanghai Inst Biol Sci, Inst Neurosci, State Key Lab Neurosci, 320 Yueyang Rd, Shanghai 200031, Peoples R China,akguo@ion.ac.cn
英文摘要	Mushroom bodies (MBs), one of the central brain structures in Drosophila melanogaster, are involved in several cognitive behaviors, such as olfactory learning and memory, visual context generalization, choice behavior facing conflicting cues. Attention is a cognitive behavior, and it facilitates a focus on the attended event while filtering out irrelevant events, thereby allowing more rapid and accurate reactions at a lower threshold in primates. Using the visual orientation paradigm in a flight simulator, we observed that MBs modulate salience-based selective fixation behavior, which resembles attention in primates to a certain degree. We found that the fixation ability of MB-deficient flies was significantly reduced when the contrast levels were lowered as well as when a certain amount of background noise was applied. Moreover, MB-deficient flies exhibited poor object fixation ability in the presence of an olfactory 'distracter'. Furthermore, during visual selection among multiple objects of different contrast, flies with MBs were able to 'pop-out' of the most salient object in a three-object selection paradigm. Finally, we determined that flies exhibited cross-modal synergistic integration between olfactory and visual signals during object-fixation behavior, which was independent of MBs. Taken together, our findings suggest that MBs do not contribute to cross-modal synergetic integration between olfactory and visual signals; instead, they confer sensory gain control and inhibitory gating in flies, this property allows entry of the salient signal as well as filters out background noise and irrelevant signals.
学科主题	Neurosciences & Neurology
收录类别	SCI
语种	英语
公开日期	2012-07-23
内容类型	期刊论文
源URL	[http://ir.sibs.ac.cn/handle/331001/1737]
专题	上海神经科学研究所_神经所(总)
推荐引用方式 GB/T 7714	Xi, Wang,Peng, Yueqing,Guo, Jianzeng,et al. Mushroom bodies modulate salience-based selective fixation behavior in Drosophila[J]. EUROPEAN JOURNAL OF NEUROSCIENCE,2008,27(6):1441-1451.
APA	Xi, Wang.,Peng, Yueqing.,Guo, Jianzeng.,Ye, Yizhou.,Zhang, Ke.,...&Guo, Aike.(2008).Mushroom bodies modulate salience-based selective fixation behavior in Drosophila.EUROPEAN JOURNAL OF NEUROSCIENCE,27(6),1441-1451.
MLA	Xi, Wang,et al."Mushroom bodies modulate salience-based selective fixation behavior in Drosophila".EUROPEAN JOURNAL OF NEUROSCIENCE 27.6(2008):1441-1451.