期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 110, 期 2, 页码 696-701出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1210489109
关键词
vision; invertebrate; predatory behavior; electrophysiology; confocal microscopy
资金
- Air Force Office of Scientific Research [FA9550-10-0472]
- Office of Integrative Activities
- Office Of The Director [0963277] Funding Source: National Science Foundation
Intercepting a moving object requires prediction of its future location. This complex task has been solved by dragonflies, who intercept their prey in midair with a 95% success rate. In this study, we show that a group of 16 neurons, called target-selective descending neurons (TSDNs), code a population vector that reflects the direction of the target with high accuracy and reliability across 360 degrees. The TSDN spatial (receptive field) and temporal (latency) properties matched the area of the retina where the prey is focused and the reaction time, respectively, during predatory flights. The directional tuning curves and morphological traits (3D tracings) for each TSDN type were consistent among animals, but spike rates were not. Our results emphasize that a successful neural circuit for target tracking and interception can be achieved with few neurons and that in dragonflies this information is relayed from the brain to the wing motor centers in population vector form.
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