Template:O'Rahilly1963 Carnegie embryo table: Difference between revisions
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! colspan=3|Otic Vesicle in Staged Embryos | ! colspan=3|Otic Vesicle in Staged Embryos | ||
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* [[Carnegie stage 9|'''Stage 9''']] - (1-3 somites) (Plate 1, fig. A) The otic region can first be distinguished in the embryo (No. 1878) of two somites as a thickening on the lateral aspect of the neural fold (Text-fig. 1). It is lined by a basement membrane that is continuous with that of the rhombencephalic neural groove. | * [[Carnegie stage 9|'''Stage 9''']] - (1-3 somites) (Plate 1, fig. A) The otic region can first be distinguished in the embryo (No. 1878) of two somites as a thickening on the lateral aspect of the neural fold (Text-fig. 1). It is lined by a basement membrane that is continuous with that of the rhombencephalic neural groove. | ||
* [[Carnegie stage 10|'''Stage 10''']] - (4-12 somites) (Plate 1, fig. B) The nuclei of the otic plate occupy mostly a basal position, leaving a superficial cytoplasmic zone termed the marginal velum. The velum appears to be covered by a terminal bar net (as is the lens at a later stage) and a brush border. Mitotic figures, in this and subsequent stages, are found in the superficial (later central) portion of the plate (as is also the case in the wall of the neural groove and tube). The first indication of invagination of the otic plate is ob- served at ten somites. Neural crest cells, recognizable in this region first at four somites, delaminate from the wall of the neural groove and proceed laterally and ventrally. They are presumed to be the facial, or the so-called acousticofacial, crest. | * [[Carnegie stage 10|'''Stage 10''']] - (4-12 somites) (Plate 1, fig. B) The nuclei of the otic plate occupy mostly a basal position, leaving a superficial cytoplasmic zone termed the marginal velum. The velum appears to be covered by a terminal bar net (as is the lens at a later stage) and a brush border. Mitotic figures, in this and subsequent stages, are found in the superficial (later central) portion of the plate (as is also the case in the wall of the neural groove and tube). The first indication of invagination of the otic plate is ob- served at ten somites. Neural crest cells, recognizable in this region first at four somites, delaminate from the wall of the neural groove and proceed laterally and ventrally. They are presumed to be the facial, or the so-called acousticofacial, crest. |
Revision as of 11:13, 2 February 2017
Carnegie Embryos - Otic Vesicle Study (1963) | ||
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Stage | No. | Somites |
9 | 1878 | 2 |
10 | 3709 | 4 |
391 | 8 | |
1201 | 8 | |
5074 | 10 | |
3710 | 11 | |
3707 | 12 | |
9870 | 12 | |
11 | 7611 | 16 |
470 | 17 | |
5072 | 17 | |
8116 | 17 | |
12 | 8943 | 22 |
8505b | 23 | |
9154 | 24 | |
6097 | 25 | |
7852 | 25 | |
8942 | 25 | |
5923 | 28 | |
7724 | 29 | |
13 | 836 | 4.0 |
7889 | 4.2 | |
9297 | 4.5 | |
8581 | 4.8 | |
8372 | 5.6 | |
14 | 8308 | 5.85 |
8999 | 6.0 | |
6503 | 6.3 | |
8552 | 6.5 | |
8314 | 8.0 | |
15 | 8997 | 9.0 |
16 | 8773 | 13.0 |
17 | 8998 | 11.0 |
8789 | 11.7 | |
18 | 8355 | 15.0 |
9247 | 15.0 | |
Otic Vesicle in Staged Embryos | ||
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Reference:O'Rahilly R. The early development of the otic vesicle in staged human embryos. (1963) J Embryol Exp Morphol., 11: 741-55 PMID 14081992 |