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Volumn 305, Issue 5686, 2004, Pages 1020-1022

Visual pattern recognition in Drosophila is invariant for retinal position

Author keywords

[No Author keywords available]

Indexed keywords

FLIGHT SIMULATORS; VISION;

EID: 4043087882     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1099839     Document Type: Article
Times cited : (75)

References (33)
  • 9
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    • note
    • Note that flies discriminated the rectangles by hue rather than brightness, because varying the relative intensities of the two colors by a factor of 10 between training and test has no significant effect on memory performance.
  • 11
    • 4043098166 scopus 로고    scopus 로고
    • note
    • In the flight simulator, an orientation task is used to measure pattern recognition and translation invariance. In order to retrieve a particular flight direction relative to the panorama in the memory test, the fly has to store the respective pattern (feature) during the training not only for recognition but also by an azimuth value for orientation (e.g., direction of flight).
  • 12
    • 4043141992 scopus 로고    scopus 로고
    • note
    • In previous experiments (3, 6), the transparency in the arena carrying the figures had been exchanged between training and test. This procedure required 30 to 60 s. Also, for half of the flies, the pattern changed from a lower to a higher position; for the other half, the sequence was the opposite. In the present experiments, the whole arena was shifted after the final training and the shift was always 20° upward. The new procedure implied that, not only the figures, but also the upper and lower margins of the arena were displaced, but the shift took only an instant and did not entail any visual disturbances from handling. Control experiments showed the same basic results with the old and new procedures. For instance, flies trained with horizontal bars at different heights (Δ4 = 20°) to avoid certain flight directions were unable to retrieve this information if, after the training, the whole arena was shifted upward by 20° (30), this inability confirmed that the flies' pattern recognition system does not tolerate the vertical displacement if vertical position is the discriminating pattern parameter.
  • 13
    • 0014208559 scopus 로고
    • R. Wehner, Nature 215, 1244 (1967).
    • (1967) Nature , vol.215 , pp. 1244
    • Wehner, R.1
  • 18
    • 4043120926 scopus 로고
    • thesis, University of Würzburg
    • M. Dill, thesis, University of Würzburg (1992).
    • (1992)
    • Dill, M.1
  • 19
    • 4043147694 scopus 로고    scopus 로고
    • note
    • As pattern recognition in honey bees is studied with freely moving animals, a formal test for translation invariance has not been possible. Nevertheless, retinotopic template-matching can be excluded as the sole mechanism (31). In particular, the data clearly indicate that the orientation of edges can be recognized independent of their precise location on the visual array (32).
  • 20
    • 4043112587 scopus 로고
    • thesis, University of Tübingen
    • E. Buchner, thesis, University of Tübingen (1971)
    • (1971)
    • Buchner, E.1
  • 25
    • 4043181787 scopus 로고    scopus 로고
    • thesis, University of Tübingen
    • S. Schuster, thesis, University of Tübingen (1996).
    • (1996)
    • Schuster, S.1
  • 28
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    • Scientific American Library, New York
    • D. H. Hubel, Eye, Brain, and Vision (Scientific American Library, New York. 1988).
    • (1988) Eye, Brain, and Vision
    • Hubel, D.H.1
  • 33
    • 4043098165 scopus 로고    scopus 로고
    • note
    • We thank B. Ronacher and L. Wiskott for valuable comments on the manuscript. This work was supported by the German Science Foundation (SFB 554) and the Multidisciplinary Research program of the Chinese Academy of Science (S.T.).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.