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Crossmodal visual input for odor tracking during fly flight
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DOI：10.1016/j.cub.2008.01.027.png)
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摘要
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Flies generate robust and high-performance olfactory and visual behaviors. Adult fruit flies can distinguish small differences in odor concentration across antennae separated by less than 1 mm [1], and a single olfactory sensory neuron is sufficient for near-normal gradient tracking in larvae [2]. During flight a male housefly chasing a female executes a corrective turn within 40 ms after a course deviation by its target [3]. The challenges imposed by flying apparently benefit from the tight integration of unimodal sensory cues. Crossmodal interactions reduce the discrimination threshold for unimodal memory retrieval by enhancing stimulus salience [4], and dynamic crossmodal processing is required for odor search during free flight because animals fail to locate an odor source in the absence of rich visual feedback [5]. The visual requirements for odor localization are unknown. We tethered a hungry fly in a magnetic field, allowing it to yaw freely, presented odor plumes, and examined how visual cues influence odor tracking. We show that flies are unable to use a small-field object or landmark to assist plume tracking, whereas odor activates wide-field optomotor course control to enable accurate orientation toward an attractive food odor.
Keyword:
2 CONTROL-SYSTEMS
DROSOPHILA-MELANOGASTER
OPTOMOTOR ANEMOTAXIS
DIFFERENT HEIGHTS
MUSCA-DOMESTICA
PHEROMONE
FLIES
MOTHS
FEEDBACK
NEURONS
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期刊
IF:
7.5
论文数:
2.3W
被引数:
7.8W
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