Absence of Monoamines in Olivo‐Cochlear Fibres in Cat

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Abstract
Fex. J., K. Fuxe and G. Lennerstrand,Absence of monoamines in olivo‐cochlear fibres in cat. Acta physiol. scand. 1965.64. 259–262. – The olivo‐cochlear neurons in the cat have been studied with the help of the fluorescence method of Falck and Hillarp with or without crushing of their axons in the vestibulo‐cochlear anastomosis or in the pons. No monoamines were found in these neurons (cell bodies, axons, terminals), not even after axotomy. It is concluded that primary catecholamines and 5‐hydroxytryptamine in all probability do not act as transmitters in the efferent innervation of the organ of Corti.