alexa The polarisation of hair cells from the ear of the European bass (Dicentrarchus labrax).
Medicine

Medicine

Anatomy & Physiology: Current Research

Author(s): Lovell JM, Findlay MM, Harper G, Moate RM, Pilgrim DA

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Abstract The polarisation of ciliary bundles on the macula of the saccule in the European bass (Dicentrarchus labrax L) has been studied using a scanning electron microscope (SEM). These data show that D. labrax possesses ciliary bundles arranged in four dichotomous quadrants with a standard orientation, comparable to hearing generalists from the order Perciformes. The spacing between ciliary bundles was investigated in three size classes of fish, with the results indicating that the addition of receptor cells in the ear of D. labrax continues for at least the first 2 years of development. The lengths of the kinocilia from ciliary bundles in each quadrant of the macula were also studied, and found to be of uniform length. In addition, we look at the internal structure of the afferent using transmission electron microscopy (TEM), revealing the nucleated cell body and peripheral nerve fibres of the saccule consistent with other TEM examinations of saccular ultrastructure. This information is required to gain an insight into the inner ear of D. labrax, as part of a larger study of the morphology and physiology of the hearing systems of both vertebrate and invertebrate marine animals. This article was published in Comp Biochem Physiol A Mol Integr Physiol and referenced in Anatomy & Physiology: Current Research

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