@vf #233

@vf #233 Fleury, I know that : We’ve been watching cells move (or not move) in embryos for a long, long time. There are no vortices of cell movement centering around the navel. Period. Your model claim four counterrotating vortices centered around the navel. You failed to make your point by simply displaying them, since [...]

time is telling

A few days ago Dr Fleury wrote me a quite short message, with just the subject line “time is telling” and a paper attached : Who moves whom during primitive streak formation in the chick embryo, Manli Chuai and Cornelis J. Weijer, HFSP J. 2009 April; 3(2): 71–76. Published online 2009 March 31. doi: 10.2976/1.3103933.

comment

Just posted this to Pharyngula at the “An ontogeny of toilet drain behavior” thread Very nice from Dr Fleury to finally inform us of what L2/R2 could be. Never late to do well. The funny thing is that he commented here but haven’t send me a message about it! That’s weird. I’m asking for evidence [...]

geometry

I’m greek and during my young years I was feed a lot of geometry. You know how it is, national pride for the ancestors, especially under a military junta. So, I’m quite sensible when one presents geometrical problems incorrectly. My very first objection concerning Fleury’s model1 was that he described the epiblast cells as contained [...]

help a fellow hang himself

A funny side-effect of PZ Myers “An ontogeny of toilet drain behavior” was to bring Fleury’s theory within the range of one of the famous crackpot detectors, Suzan Mazur.

Quite clear

This is an excerpt from Flery’s paper, p16, column 1. However, Popperl et al.’s article deals mostly with the role of lazarus in the cranial (hindbrain and anterior trunk) compartment, (especially it shows how pbx genes participate in the regulatory loop of hox genes needed to specify rhombomere boundaries in the hindbrain) and when coming [...]

I was wrong

Well, I was dead wrong in fact, when a few weeks ago I was writing: What embryology textbooks our physicist have consulted that doesn’t give the origin of the mesoderm and the subdivisions of the mesodermal plate to paraxial, intermediary and lateral? He should give us the name(s) of the book(s) to avoid it(them).

housekeeping

I’m sorry for the delay to complete the 2.2 section presentation. It’s a boring task I promised to carry out and the accumulation of errors induce headaches I’ll carry it out, but it will take some time.

antp-C and bx-C complexes genes’ expression domains

credit: G. Furelaud – Source: Drosobox 1.3 – CC-by-nc-nd Hat tip to GF who produced the gif during his high-school studies.

morphogenic gene

morphogenic gene How one comes to qualify a gene as morphogenic? Fleury didn’t included this information in his paper, neither in the text or the glossary despite his interest on morphogenesis. I’ve chosen to illustrate the concept using bicoid as it’s one of the examples used by the author.