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RISS 인기검색어
- 검색키워드
- 저자 : D. L. Denlinger (검색결과 2 건)
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Young-Soo Kim,D. L. Denlinger,B. Smith 한국응용곤충학회 2005 Journal of Asia-Pacific Entomology Vol.8 No.4
We have developed a new paradigm for examining classical conditioning in the flesh fly, Sarcophaga crassipalpis, and specifically apply it as a sensitive measurement for sublethal effects of cold shock. When water was applied as a conditioned stimulus to the right tarsus and reinforced with a brief opportunity to feed on a sucrose-water solution, flies quickly learn to discriminate stimulation of the right from the left tarsus. Further analyses revealed that the discrimination has a strong spatial component. Flies also retain this spatial discrimination over four days as indicated by the fact that the number of correct responses increases with continued training over that time. Cold shock (-10℃ for 3 min) applied 30 and 60 min after first training interfered with learning. But, cold shock applied 120 min before or 90 min after conditioning did not significantly affect learning. The spatial memory we have identified therefore has a sensitive period during which it can be disrupted with cold shock. Furthermore, we demonstrate that the disruptive effect of cold shock on learning formation can be prevented by rapid cold hardening, a brief pre-exposure to a less severe low temperature.
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Kim, Young-Soo,Denlinger, D.L.,Smith, B. Korean Society of Applied Entomology 2005 Journal of Asia-Pacific Entomology Vol.8 No.4
We have developed a new paradigm for examining classical conditioning in the flesh fly, Sarcophaga crassipalpis, and specifically apply it as a sensitive measurement for sublethal effects of cold shock. When water was applied as a conditioned stimulus to the right tarsus and reinforced with a brief opportunity to feed on a sucrose-water solution, flies quickly loam to discriminate stimulation of the right from the left tarsus. Further analyses revealed that the discrimination has a strong spatial component. Flies also retain this spatial discrimination over four days as indicated by the fact that the number of correct responses increases with continued training over that time. Cold shock ($-10^{\circ}C$ for 3 min) applied 30 and 60 min after first training interfered with learning. But, cold shock applied 120 min before or 90 min after conditioning did not significantly affect learning. The spatial memory we have identified therefore has a sensitive period during which it can be disrupted with cold shock. Furthermore, we demonstrate that the disruptive effect of cold shock on learning formation can be prevented by rapid cold hardening, a brief pre-exposure to a less severe low temperature.
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