Atlas of the developing inner ear in zebrafish

Developmental Dynamics : an Official Publication of the American Association of Anatomists
Michele Miller Bever, Donna M Fekete

Abstract

This report provides a description of the normal developing inner ear of the zebrafish, Danio rerio, with special focus on the pars inferior. Zebrafish specimens, ranging in age from 3 to 30 days postfertilization (dpf), were processed for standard histologic sections or with a paint-fill method to show three-dimensional morphogenesis of the membranous labyrinth. Adult zebrafish (age 2 years) were also processed for inner ear paint-fills. Although development of the semicircular canals occurs rapidly (by 3 dpf), the pars inferior develops more gradually during days 5-20 postfertilization. A rudimentary endolymphatic duct emerges by 8 dpf. Differentiated hair cells of the lagenar macula are evident by 15 dpf, in a chamber located lateral and posterior to the saccule. By 20 dpf, the saccule itself is separated from the utricle, but remains connected by means of the utriculosaccular foramen. The maculae neglectae, each with differentiated hair cells, lie on the floor of the utricle near this foramen. A medial connection between the sacculi of right and left ears, the transverse canal, is also complete by 20 dpf. A ridge of mesenchyme, previously undescribed, bisects the saccule in zebrafish fry at 20-30 dpf. The images in the pain...Continue Reading

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Citations

Apr 12, 2013·Journal of the Association for Research in Otolaryngology : JARO·Zhongmin Lu, Alexandra A DeSmidt
Sep 23, 2003·Developmental Biology·Bruce B Riley, Bryan T Phillips
Sep 23, 2003·Developmental Biology·Saulius SumanasMichele Miller Bever
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Mar 12, 2008·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Yu-Chi ShenKate F Barald
Jan 25, 2012·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Benjamin KopeckyBernd Fritzsch
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Mar 5, 2010·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Byung-Yong Park, Jean-Pierre Saint-Jeannet
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