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Neurosci Lett. 1988 Nov 11;93(2-3):209-13.

Odor stimuli modulate retinal excitability in fish.

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Department of Anatomy, School of Medicine, University of Göttingen, F.R.G.


Recording electroretinograms (ERGs) of fish prior to olfactory stimulation and after application of odor substances to the nostrils revealed a modulatory effect by chemoreceptive afferents on retinal responsiveness. The b-wave amplitude was increased in animals previously stimulated with dissolved food extracts. It is suggested that this phenomenon is related to well known behavioral effects of chemoreceptive stimulation on visually guided postural control mechanisms. The result for the first time suggests a behaviorally significant function of efferent optic nerve fibers.

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