otocyst


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otocyst

 [o´to-sist]
1. the auditory vesicle of the embryo.
2. the organ of hearing in certain animals.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

o·to·cyst

(ō'tō-sist),
1. Embryonic otic vesicle.
2. A balancing organ, analogous to the utricle of mammals, possessed by certain invertebrates and containing grains of calcareous material or of sand.
[oto- + G. kystis, a bladder]
Farlex Partner Medical Dictionary © Farlex 2012

otocyst

(ō′tə-sĭst′)
n.
1. The structure formed by invagination of the embryonic ectodermal tissue that develops into the inner ear.
2. A statocyst.

o′to·cys′tic adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

otocyst

The precursor, in the MESODERM of the head of the embryo, of the membranous LABYRINTH of the inner ear.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

otocyst

an invertebrate organ, containing fluid and OTOLITHS, that is believed to have an auditory function.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
In contrast, Sox2 is expressed in the neural tube and dorsolateral regions of murine otocysts at embryonic day 9.5 (E9.5), which is consistent with a role in sensory organ development.
These mesenchymal cells were also found in the mammalian otocyst in which the retinoic acid nuclear receptor genes are expressed (Romand et al., 2006).
Analysis of different types of migrating cells whether they express either Islet-1 or TuJ-1 in the organ-cultured otocyst needs further study.
A fate map of chick otic cup closure reveals lineage boundaries in the dorsal otocyst. Dev.
Morphological and physiological development of vestibular hair cells in the organ-cultured otocyst of the chick.
Schematic of isolation and culture of the chick otocyst (O, otocyst).
Morphology of the otic vesicle (OV) or otocyst of embryonic day 3, E3 (HH stage 19) embryo showing the endolymphatic duct (ED) locates at the dorsal aspect of the otocyst (D, dorsal; A, anterior).
The chick otocyst isolated from E3 (HH stage 19) embryo (A, anterior; AVG, acoustic-vestibular ganglion; D, dorsal; OE, otic epithelium; OV, otic vesicle or otocyst; asterisk, periotic mesenchyme; Bar, 200 [micro]m)
Photomicrograph of the migrating cells of the otocyst isolated from E3 (HH stage 19) embryo showing neuroblast-like cells (arrowheads) and fibroblast-like cells (arrows)
RAI 2 Partial deletions and distortions of midbrain/ hindbrain border region (MB/HB); eyes slightly closer together; axis slightly truncated; heart smaller with pericardial edema, otocysts slightly closer to MB/HB; tail slightly curled; deletions of the quadrate, pterygoid, and hyosymplectic cartilage; malformations of Meckel's cartilage, ceratohyals and the basihyal.
High concentrations of RA further disrupt the pectoral fins, otocysts, forebrain, and posterior hindbrain structures (including cartilage).