Characterization of polarization sensitive neurons of the central complex in the brain of the desert locust (Schistocerca gregaria) [Elektronische Ressource] = Charakterisierung von polarisationssensitiven Neuronen des Zentralkomplexes im Gehirn der Wüstenheuschrecke (Schistocerca gregaria) / vorgelegt von Stanley Heinze

Sujets

• Biologie

Informations

• Publié par: philipps-universitat_marburg
• Publié le: 01 janvier 2009
• Nombre de lectures: 15
• Poids de l'ouvrage: 57 Mo

Extrait

Characterization of polarization sensitive
neurons of the central complex in the brain of
the desert locust (Schistocerca gregaria)


Charakterisierung von polarisationssensitiven Neuronen des
Zentralkomplexes im Gehirn der Wüstenheuschrecke (Schistocerca
gregaria)




Dissertation zur Erlangung des
Doktorgrades der Naturwissenschaften
(Dr. rer. nat.)

















dem Fachbereich Biologie
der Philipps-Universität Marburg
vorgelegt von
Stanley Heinze
aus Großröhrsdorf
Marburg/Lahn, 2009






Vom Fachbereich Biologie der Philipps-Universität Marburg
als Dissertation am 21.04.2009 angenommen.

Erstgutachter: Prof. Dr. Uwe Homberg
Zweitgutachter: Prof. Dr. Monika Stengl


Tag der mündlichen Prüfung am: 30.04.2009 U
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Contents



Erklärung: Eigene Beiträge und veröffentlichte Teile der Arbeit .........................1
Zusammenfassung...................................................................................................4
Introduction.............................................................................................................12
Animal navigation......................................................................................................................... 12
Polarized light and other sky compass cues ............................................................................... 12
Utilisation of polarized light for orientation................................................................................... 13
The polarization vision pathway of the locust brain..................................................................... 13
Time compensation ..................................................................................................................... 14
The central complex – neuroanatomy ......................................................................................... 15
The central complex – function.................................................................................................... 15
Scope of this work........................................................................................................................ 16
References................................................................................................................................... 16
Neuroarchitecture of the Central Complex of the Desert Locust: Intrinsic
and Columnar Neurons..................................................................................19
Maplike representation of celestial E-vector Orientations in the brain of
an insect..........................................................................................................45
Linking the input to the output - New sets of neurons complement the
polarization vision network in the locust central complex .........................59
Introduction .......................................................................................................60
Materials and Methods......................................................................................61
Results ...............................................................................................................63
New sets of POL-neurons............................................................................................................ 63
CL1 neurons ................................................................................................................................63
TB2 neurons.64
Conditionally polarization-sensitive neurons ............................................................................... 64
CPU2 neurons ............................................................................................................................. 65
CL2 neurons.66
CPU4 neurons 67
Analysis of Φ -values................................................................................................................ 67 max
Polarization-sensitive neurons with input regions in the LAL ...................................................... 70
Discussion.........................................................................................................70 U
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Contents iv
Connecting the CBL with the PB ................................................................................................. 70
Column-specific cell types ........................................................................................................... 72
Conditional polarization sensitivity............................................................................................... 72
Beyond the central complex ........................................................................................................ 72
References.........................................................................................................72
Transformation of polarized light information in central complex of the
locust...............................................................................................................74
Introduction .......................................................................................................75
Material and Methods........................................................................................76
Results77
Central-complex POL-neurons .................................................................................................... 77
Background firing properties, response amplitudes and firing variability .................................... 77
Tuning curves .............................................................................................................................. 80
Ocular dominance........................................................................................................................ 81
Structure of receptive fields ......................................................................................................... 83
Physiological evidence for input and output regions ................................................................... 85
Discussion85
Information flow through the CC.................................................................................................. 85
Two parallel input pathways to the CC ........................................................................................ 85
CL1 neurons – key players of the network .................................................................................. 86
Transformation of visual fields..................................................................................................... 86
Evidence for a 360° azimuth map in the PB................................................................................ 87
References.........................................................................................................87
Integration of multiple visual stimuli in neurons of the locust central
complex...........................................................................................................89
Introduction .......................................................................................................90
Material and methods .......................................................................................91
Results ...............................................................................................................93
Neurons of the optic lobes ....................................................................................