Two-dimensional receptive fields of midbrain lateral line units in the goldfish, <Emphasis Type="Italic">Carassius auratus</Emphasis> |
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Authors: | Kai Voges Horst Bleckmann |
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Institution: | (1) Institute of Zoology, University of Bonn, Poppelsdorfer Schloss, 53115 Bonn, Germany;(2) Present address: Department of Neuroscience, Erasmus MC, Dr. Molewaterplein 50, 3015 GE Rotterdam, The Netherlands |
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Abstract: | We determined the receptive fields of midbrain lateral line units in goldfish, Carassius auratus, with a 50 Hz vibrating sphere placed at various azimuths and elevations alongside the fish and studied how responses were
affected by different directions of sphere vibration. The receptive fields of toral lateral line units, in contrast to those
of primary afferent nerve fibers, did not represent the pressure gradient pattern generated by a vibrating sphere. Thus, unlike
primary afferents, single toral lateral line units did not code for source location in their spatial discharge patterns. The
two-dimensional receptive fields were round, horizontally or vertically stretched, or complex. While some toral lateral line
units were sensitive to the direction of sphere vibration others were not. |
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Keywords: | |
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