Lateral line units in the amphibian brain could integrate wave curvatures


Aquatic predators like Xenopus laevis exploit mechano-sensory lateral lines to localise prey on the water surface by its wave emissions. In terms of distance, hypothetically, the source of a concentric wave could be centrally represented based on wave curvatures: for Xenopus, we present a first sample of 98 extracellularly recorded brainstem and midbrain responses to waves with curvatures ranging from 22.2–11.1 m−1. At the frog, concurrently, wave amplitudes and their spectral composition were kept stable. Notably, 61% of 98 units displayed curvature-dependent spike rates, suggesting that wave curvatures could support an extraction of source distances in the amphibian brain.

DOI: 10.1007/s00359-008-0351-1

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@article{Behrend2008LateralLU, title={Lateral line units in the amphibian brain could integrate wave curvatures}, author={Oliver Behrend and Francisco Branoner and Ulrike Ziehm and Zhivko Zhivkov}, journal={Journal of Comparative Physiology A}, year={2008}, volume={194}, pages={777-783} }