The torus semicircularis is located dorsal to the lateral tegmentum where it extends into the medial tectal ventricle and. The following account outlines the major cns divisions in the zebrafish and the. In addition, by using high resolution confocal imaging followed by digital tracing, we describe the morphology of tectal pyramidal cells type i cells that are gfp positive in the transgenic line. Secondorder projection from the posterior lateral line in the early zebrafish brain. Other zebrafish strains used in the study include ek, a com. Fiber connections of the torus longitudinal is in a teleost. This study describes the cytoarchitecture of the torus longitudinalis tl in adult zebrafish by using light and electron microscopy, as well as its main connections as revealed by dii tract tracing. The torus semicircularis is a laminated structure in the mesencephalon of fishes, which can be considered as an auditory and lateral line center 17. Cyprinus carpio reexamined article in the journal of comparative neurology 4572. Sensorimotor transformations in the zebrafish auditory system. We appreciate as much detail as possible and references as appropriate. A tool for visualizing 3d expression within the brain of zebrafish transgenic lines. In zebrafish larva, a coarse spatial frequency organization was.
This region is divided into subnuclei that each receive lemniscal projections. Zebrafish reveals different and conserved features of vertebrate. In this paper we examine the secondorder projection from the posterior lateral. Human orthologs of this gene implicated in several diseases, including aromatase excess syndrome. Fiber connections of central nucleus of semicircular torus. Fiber connections of central nucleus of semicircular torus in cyprinids article in the journal of comparative neurology 49. Octavolateral projections to the torus semicircularis of. Neurons from the medulla project to the nucleus centralis and the nucleus ventrolateralis in the torus semicircularis, providing afferent auditory and hydrodynamic information. Neuronal activity was recorded from different optical planes containing the octaval nuclei on in the hindbrain, which is the first known relay for auditory information in teleost fish. In goldfish, crude tonotopy was reported in the torus semicircularis. Zebrafish international resource center zirc china zebrafish resource center czrc european zebrafish resource center ezrc. This projection is well developed in zebrafish at four days after fertilization.
The torus semicircularis is the major target of lateralline and inner. Pdf central neuroanatomy of electrosensory systems in fish. The torus longitudinalis only occurs in ray finned fishes. Medulla oblongata optic tectum torus semicircularis trigeminal root. The toms of nonelectroreceptive fishes generally contains only a few cell layers. The torus semicircularis is located dorsal to the lateral tegmentum where it extends into the medial tectal ventricle and receives ascending sensory octavolateralis input. Pdf secondorder projection from the posterior lateral.
Caudal region of the midbrain roof corresponding to the mammalian inferior colliculus. Multitissue structure that is part of the midbrain and develops from the alar plate. Secondorder projection from the posterior lateral line in the early. Multitissue structure that is a paired longitudinal eminence of granular cells that develops from the alar plate and is attached to the tegmentum in the medial tectal ventricle. Please use this form to recommend updates to the information in zfin. Zfin expression search results zebrafish information network. In zebrafish larvae, audition of frequencies above 100 hz is.