Summary
The origin of efferent fibers to the inner ear was studied in Caiman crocodilus. After injection of horseradish peroxidase into the basilar papilla or into the ampullae of the horizontal and anterior semicircular canals, neurons labeled by the granular reaction product of retrogradely transported HRP were found in the medulla oblongata bilaterally. Parent cells of the efferent cochlear bundle were found in the medial reticular nucleus and in the rostroventral division of the superior olive bilaterally. Efferent vestibular neurons were found in the medial reticular nucleus bilaterally with more neurons ipsilateral to the injection site.
Zusammenfassung
Der Ursprung der efferenten labyrinthären Innervation wurde bei einem Reptil, Caiman crocodilus, untersucht. Nach Injektion von Meerrettich-Peroxydase (HRP) entweder in die Basilarpapille oder in die Ampullen des horizontalen und vorderen Bogenganges wurden die Ursprungszellen der efferenten Fasern durch retrograden axonalen Transport von HRP markiert. Die Ursprungszellen der efferenten cochleären Innervation fanden sich in der Medulla oblongata im rostroventralen Anteil der oberen Olive sowie im ventral dazu gelegenen Nucleus reticularis medius. Efferente vestibuläre Zellen ließen sich beidseits im Nucleus reticularis medius nachweisen, wobei ipsilateral zur Injektion mehr markierte Zellen nachweisbar waren.
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Herrn Prof. Dr. Fritz Zöllner zum 80. Geburtstag gewidmet
Mit Unterstützung der Deutschen Forschungsgemeinschaft, SFB 70
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Strutz, J., Beck, C. & Schmidt, C.L. Der Ursprung der efferenten labyrinthären Innervation bei Reptilien. Arch Otorhinolaryngol 233, 41–48 (1981). https://doi.org/10.1007/BF00464273
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DOI: https://doi.org/10.1007/BF00464273