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On the duration of the polarization process in the ear primordium of embryos of Amblystoma punctatum (Linn.)

โœ Scribed by Hall, Edmund K.

Publisher
John Wiley and Sons
Year
1939
Tongue
English
Weight
898 KB
Volume
82
Category
Article
ISSN
0022-104X

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โœฆ Synopsis

SEVEN FIOUMS

I n the primordium of the internal ear of embryos of the salamander, Amblystoma punctatum (Linn.), there is known to be a polarization which determines the arrangement of the structures along the antero-posterior (cephalo-caudal) axis of the differentiated labyrinth.

This polarization is found during and after fusion of the neural folds. It has been revealed by grafting the ear ectoderm to the ear region of another embryo of the same stage, and rotating the graft in such a way that its a p axis is reversed with respect to that of the host (Harrison, '24, '36).

๐Ÿ“œ SIMILAR VOLUMES

Reversal of polarization in the ear prim
Reversal of polarization in the ear primordium of Amblystoma punctatum (Linn.)
โœ Hall, Edmund K. ๐Ÿ“‚ Article ๐Ÿ“… 1941 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 514 KB

The experimental studies of Harrison ( '24, '36) have revealed the existence of periods of axial polarization in the development of the internal ear of the salamander, Amblystoma punctatum (Linn.). During neural plate a i d fold stages, the ear ectoderm may be transferred t o the ear region of anot

Establishment of definitive polarity in
Establishment of definitive polarity in the dorsoventral axis of the forelimb girdle in Amblystoma punctatum (Linn.)
โœ Swett, F. H. ๐Ÿ“‚ Article ๐Ÿ“… 1941 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 366 KB

LIMB GIRDLE I N A3TBLYSTOMA 3'. H. SWETT D c p a r l m m i of A ? ~~t o n i ? y , Duke Univeraty School of X e d i c h c , Dzcrham, North Carolina THREE FIGURES TNTROD IJC'TlON Earlier observations upon the establishment of definitive girdle asymmetry (Swett, '28) resulted in the conclusion that th

Experiments upon the relationship of sur
Experiments upon the relationship of surrounding areas to polarization of the dorsoventral limb-axis in Amblystoma punctatum (Linn.)
โœ Swett, F. H. ๐Ÿ“‚ Article ๐Ÿ“… 1938 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 823 KB

School of Yedicine ## ELEVEN FIQUBES 'Doctor Nicholas has allowed me to read ail unpublished manuscript in which further experiments, substantiatiiig and extellcling his earlier results, are described. ' A brief comment on some of the preliminary experiments may be found in an earlier paper (Swe