Conditioning odor-shock associations in the black blowfly,Phormia regina |
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Authors: | T R McGuire T Tully A Gelperin |
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Institution: | (1) Department of Biological Sciences, Rutgers University, 08855 Piscataway, New Jersey;(2) Department of Biology, Brandeis University, 02254 Waltham, Massachusetts;(3) Department of Molecular Biophysics, AT&T Bell Laboratories, 07974 Murray Hill, New Jersey |
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Abstract: | Discriminative classical conditioning of an olfactory avoidance response was demonstrated in the blowfly, Phormia regina.Learning indices were calculated as the fraction of flies avoiding the CS+ (conditioned stimulus paired with electric shock reinforcement) minus the fraction of flies avoiding the CS-(conditioned stimulus not paired with electric shock), averaged over two different groups of flies, in which reciprocal odors were used as the CS+. Avoidance responses to both odors presented simultaneously at a T-maze choice point yielded mean learning indices of zero for naive flies or pseudoconditioned (shock alone) or sensitized (odors alone) controls. In contrast, pairing an odor with electric shock produced a mean learning index significantly greater than zero. These results are similar to those reported for Drosophila melanogaster.Blow flies, however, showed much lower levels of associative learning than fruit flies. |
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Keywords: | olfaction associative learning Diptera |
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