[email protected] ) © 2011. 2011 Craniofacial muscle development Cranial mesoderm Genetic regulation Head muscle evolution Tbx Pitx The skeletal muscles of the head, known as craniofacial muscles ( Fig. 1 ), are essential for everyday movements, including those that control facial expression...

... for correspondence (e-mail: [email protected] ) 31 8 2006 © 2006. 2006 Notch Hairy-related transcription factor HRT HES Hey Gridlock Atrioventricular canal T-box Tbx During early embryogenesis, the linear heart [HH stage 10 in the chick( Hamburger and Hamilton,1951 ), E8...

[email protected] ) 09 17 1998 15 09 1998 © 1998 by Company of Biologists 1998 Limb development T-box genes Chick Limb identity Ptx Tbx In recent years, rapid advances have been made in our understanding of the initiation and patterning of the chick limb bud, mostly...