... of motor neurons indicated that Hoxa1 and Hoxb1 synergise in patterning the VIIth through XIth cranial nerves. The second arch expression of neural crest cell markers was abolished or dramatically reduced, suggesting a defect in this cell population. Strikingly, the second arch of the double mutant embryos...

... to specific developmental windows, and will facilitate studies of distinct temporal events. * Author for correspondence (e-mail: [email protected] ) 11 06 1997 © 1997 by Company of Biologists 1997 retinoid receptors vitamin A deficiency eye neural crest cranial nerves...

... Chisaka , O. , Musci , T. S. and Capecchi , M. R. ( 1992 ). Developmental defects of the ear, cranial nerves and hindbrain resulting from targetted disruption of the mouse homeobox gene hox-1.6 . Nature 355 , 516 – 520 . 10.1038/355516a0 Dencker , L. , Annerwall , E...

... appear normal as judged from the distribution pattern of CRABPI transcripts in the neurectoderm and from the histological analysis of the cranial nerve components derived from these structures. In contrast, the neural-crest-cell-free region normally located opposite rhombomere 5 is lacking in Hoxa-1...

... of the hindbrain normally anterior to the otocyst (rhombomeres 1-4) is abnormal following RA treatment. Sensory and motor axons of cranial nerves V and Vll form a single root and the peripheral paths of V and VH and IX and X are also abnormal, as is the more anterior location of the otocyst. These anatomical...

..., neuropore; OV, otic vesicle; PNA, peanut agglutinin; P, prosencephalon; Rl, rhombomere No. 1; R, rhombencephalon; T, telencephalon. brain segmentation cerebellum cranial nerves mesoderm rhombomere neuromere otic vesicle ’ … deswegen ich denn auch nur kürzlich meine vieljahrig gehegte...