Associative olfactory learning in the moth Manduca sexta.

@article{citeulike:763391, abstract = {The proboscis extension response conditioning protocol has been used to explore olfactory-based associative learning in an array of insects. We have monitored a different feeding reflex, which involves activation of the cibarial pump, to demonstrate olfactory learning in the moth Manduca sexta. In the first experiment, four different treatment conditions were used to assess associative (Pavlovian) learning. The results indicate that an excitatory cibarial pump response develops and is retained for at least 24 h only when odor is forward-paired with the presentation of sucrose. Three control treatments, backward pairing, air (no odor) pairing and random pairing, failed to increase the cibarial pump response. However, an excitatory cibarial pump response developed when the backward- and air-paired groups received forward pairing of odor and sucrose on the following day. In contrast, moths experiencing random pairing on day 1 displayed a slower rate of acquisition during forward pairing on day 2, which may indicate inhibition. The second experiment investigated discrimination learning. Two odors were randomly presented, one odor being forward-paired with sucrose (+), the other presented alone (-) in a counterbalanced design. Again, only when odor was forward-paired with sucrose did learning occur. We discuss the implication of these findings for a broader comparative analysis of learning in insects.}, address = {Department of Entomology, Ohio State University, Columbus 43210-1220, USA. daly.40@osu.edu}, author = {Daly, K. C. and Smith, B. H. }, citeulike-article-id = {763391}, issn = {0022-0949}, journal = {J Exp Biol}, keywords = {moth}, month = {July}, number = {Pt 13}, pages = {2025--2038}, posted-at = {2006-07-18 20:28:52}, priority = {2}, title = {Associative olfactory learning in the moth Manduca sexta.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/10851119}, volume = {203}, year = {2000} }

TY - JOUR ID - citeulike:763391 L3 - citeulike-article-id:763391 TI - Associative olfactory learning in the moth Manduca sexta. JF - J Exp Biol VL - 203 IS - Pt 13 SP - 2025 EP - 2038 AD - Department of Entomology, Ohio State University, Columbus 43210-1220, USA. daly.40@osu.edu SN - 0022-0949 N2 - The proboscis extension response conditioning protocol has been used to explore olfactory-based associative learning in an array of insects. We have monitored a different feeding reflex, which involves activation of the cibarial pump, to demonstrate olfactory learning in the moth Manduca sexta. In the first experiment, four different treatment conditions were used to assess associative (Pavlovian) learning. The results indicate that an excitatory cibarial pump response develops and is retained for at least 24 h only when odor is forward-paired with the presentation of sucrose. Three control treatments, backward pairing, air (no odor) pairing and random pairing, failed to increase the cibarial pump response. However, an excitatory cibarial pump response developed when the backward- and air-paired groups received forward pairing of odor and sucrose on the following day. In contrast, moths experiencing random pairing on day 1 displayed a slower rate of acquisition during forward pairing on day 2, which may indicate inhibition. The second experiment investigated discrimination learning. Two odors were randomly presented, one odor being forward-paired with sucrose (+), the other presented alone (-) in a counterbalanced design. Again, only when odor was forward-paired with sucrose did learning occur. We discuss the implication of these findings for a broader comparative analysis of learning in insects. KW - moth AU - Daly, KC AU - Smith, BH PY - 2000/07// UR - http://view.ncbi.nlm.nih.gov/pubmed/10851119 ER -