Neuronal correlates of temperature guided behavior in ants

............................................................................................................................. 17 Introduction ........................................................................................................................ 17 I.2 Material and Methods ................................................................................................... 20 I.2.1 Animals and preparation .................................................................................... 20 I.2.2 Morphological Investigation by SEM, FIB-FESEM, cLSM, light microscopy and TEM .......................................................................................................... 20 I.2.3 TEM procedure .................................................................................................. 21 I.2.4 Temperature stimulation set-up ......................................................................... 22 I.2.5 Recording of sensory neuron activity and temperature stimulus ...................... 22 I.2.6 Data analyses and statistics .............................................................................. 23 I.3 Results .......................................................................................................................... 26 I.3.1 External and internal morphology and location of the S. coelocapitulum ......... 26 I.3.2 The TT-neuron encodes transient temperature ................................................ 31 I.3.3 The ST-neuron has a narrow working range .................................................... 35 I.4 Discussion .................................................................................................................... 37 I.4.1 Morphological characteristics of the S. coelocapitulum .................................... 37 I.4.2 The physiological properties of the thermo-sensitive neurons ......................... 40 Acknowledgements .................................................................................................... 42 II. The Sensillum campaniform and Sensillum coelocapitulum: Mechanosensation vs. thermo-/hygrosensation ............................................................................................. 43 Abstract ............................................................................................................................. 43............................................................................................................................ 43 II.