Arican, Cansu ORCID: 0000-0003-2332-6268 (2022). Sensory to motor transformation during innate and adaptive behavior in the cockroach. PhD thesis, Universität zu Köln.
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Abstract
Animal behavior is the result of processing and integrating various internal and external information. It can be highly flexible and vary between individuals. In insects, the mushroom body output region is an essential higher-order brain area in this process. Integration of various sensory and internal information takes place here as well as memory formation. To investigate adaptive behavior, we established classical and operant conditioning paradigms with a focus on inter-individual differences: American cockroaches were trained harnessed as well as freely moving. To gain insight into the transformation from sensory input to motor output behind innate and adaptive behavior, we established an extracellular recording setup including different sensory stimulators: 1) We simultaneously recorded mushroom body output neurons (MBONs) and initial feeding behavior in single animals during odor stimulation and 2) we recorded MBON responses to different sensory modalities. On the behavioral level, cockroaches were successful in memory formation across different paradigms and sensory modalities. Inter-individual differences regarding their cognitive abilities were discovered. Simultaneous neuronal and behavioral recordings revealed a correlation between MBON and feeding responses to food odors, which allowed for prediction of the behavior. Furthermore, neuronal recordings demonstrated that MBONs encode stimulus on- and off-responses, show adaptation during rapid successive stimulation and differ in response latencies to different sensory modalities. Our results strengthen the idea that the mushroom body output region is not only important for memory formation. In addition, it is crucial for the integration as well as categorization of different sensory modalities. Moreover, it is involved in the sensory to motor transformation. Combining the successfully established behavioral and electrophysiological setups builds a solid base to investigate the role of MBONs in memory formation with high temporal resolution and with regard to inter-individual differences.
Item Type: | Thesis (PhD thesis) | ||||||||||||
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URN: | urn:nbn:de:hbz:38-642515 | ||||||||||||
Date: | 2022 | ||||||||||||
Language: | English | ||||||||||||
Faculty: | Faculty of Mathematics and Natural Sciences | ||||||||||||
Divisions: | Faculty of Mathematics and Natural Sciences > Department of Biology > Zoologisches Institut | ||||||||||||
Subjects: | Natural sciences and mathematics Life sciences |
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Date of oral exam: | 24 November 2022 | ||||||||||||
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Refereed: | Yes | ||||||||||||
URI: | http://kups.ub.uni-koeln.de/id/eprint/64251 |
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