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Integration of binocular optic flow in cervical neck motor neurons of the fly

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons39116

Wertz,  Adrian
Department: Systems and Computational Neurobiology / Borst, MPI of Neurobiology, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons38871

Haag,  Jürgen
Department: Systems and Computational Neurobiology / Borst, MPI of Neurobiology, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons38770

Borst,  Alexander
Department: Systems and Computational Neurobiology / Borst, MPI of Neurobiology, Max Planck Society;

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Zitation

Wertz, A., Haag, J., & Borst, A. (2012). Integration of binocular optic flow in cervical neck motor neurons of the fly. Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology, 198(9), 655-668. doi:10.1007/s00359-012-0737-y.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-EF65-0
Zusammenfassung
Global visual motion elicits an optomotor response of the eye that stabilizes the visual input on the retina. Here, we analyzed the neck motor system of the blowfly to understand binocular integration of visual motion information underlying a head optomotor response. We identified and characterized two cervical nerve motor neurons (called CNMN6 and CNMN7) tuned precisely to an optic flow corresponding to pitch movements of the head. By means of double recordings and dye coupling, we determined that these neurons are connected ipsilaterally to two vertical system cells (VS2 and VS3), and contralaterally to one horizontal system cell (HSS). In addition, CNMN7 turned out to be connected to the ipsilateral CNMN6 and to its contralateral counterpart. To analyze a potential function of this circuit, we performed behavioral experiments and found that the optomotor pitch response of the fly head was only observable when both eyes were intact. Thus, this neural circuit performs two visuomotor transformations: first, by integrating binocular visual information it enhances the tuning to the optic flow resulting from pitch movements of the head, and second it could assure an even head declination by coordinating the activity of the CNMN7 neurons on both sides.