Change search
ReferencesLink to record
Permanent link

Direct link
Identification of different antennal-lobe neuron categories;: a morphological and physiological study of second order neurons in the primary olfactory brain centre of the moth Heliothis virescens
Norwegian University of Science and Technology, Faculty of Natural Sciences and Technology, Department of Biology.
2014 (English)MasteroppgaveStudent thesis
Abstract [en]

Olfaction is the sense of smell, first mediated by specialized sensory cells in the sensilla hair covering the moth antennae, projecting to the primary olfactory centre the antennal lobe. From this first synaptic level the secondary neuronal fibers follow one of the three antennal lobe tracts to higher olfactory neuropils called the calyces and the lateral horn. The antennal lobe is also innervated by local interneurons and centrifugal neurons. Moths are preferred objects of olfactory research due to their highly sensitive and species-specific olfactory systems. Their ability to process and compute plant odour information, on the other hand, is still fairly unknown. This despite the many odour specific olfactory sensory neurons classified. The present study aimed to identify individual antennal-lobe neurons physiologically and morphologically in the moth Heliothis virescens. The insects were stimulated with identified primary plant odorants and multicomponent blends, in addition to known pheromone components, during intracellular recordings from second order neurons in the antennal lobe. Then, staining of the neurons was attempted and successfully stained neurons were characterized. The categories of antennal lobe neurons comprise diverse morphological and physiological properties and all three types are represented in this thesis. The results of this thesis show a varied antennal lobe neuron population concerning both the morphology and the physiologic characteristics. Both confirming the known morphologic characteristics but also revealing exceptions previously not described in H. virescens specially or in moth in general. Also, no differences were found between the physiological properties of neurons following the three antennal lobe tracts. Of special interest is the centrifugal neuron presented in this thesis with appurtenant interesting physiological and morphological data, previously not been identified in H. virescens.

Place, publisher, year, edition, pages
Institutt for biologi , 2014. , 67 p.
Identifiers
URN: urn:nbn:no:ntnu:diva-25234Local ID: ntnudaim:8724OAI: oai:DiVA.org:ntnu-25234DiVA: diva2:733681
Supervisors
Available from: 2014-07-10 Created: 2014-07-10 Last updated: 2014-07-10Bibliographically approved

Open Access in DiVA

fulltext(6634 kB)431 downloads
File information
File name FULLTEXT01.pdfFile size 6634 kBChecksum SHA-512
793720b8ceceaa880bdcd25e58dfa458525486bce9345c47237d96933f8fede0eba9e681c301d1b305659cae4300bd9581c427fb457e089e5ab6fb66c81b4430
Type fulltextMimetype application/pdf
cover(3216 kB)10 downloads
File information
File name COVER01.pdfFile size 3216 kBChecksum SHA-512
54e190602b79fbcd4a0fb82903679a9632a5b7e2fea4d9a2e03c1395ce473ec3ee5ea4c857b4af58097718eb41693865324aa8579372de3de8102aef23a4ae83
Type coverMimetype application/pdf

By organisation
Department of Biology

Search outside of DiVA

GoogleGoogle Scholar
Total: 431 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 28 hits
ReferencesLink to record
Permanent link

Direct link