During evolution the vertebrate head has acquired a number of unique features including specialized paired sense organs and cranial sensory ganglia. These evolutionary novelties arise from discrete thickenings of the head ectoderm known as cranial placodes. They include the adenohypophyseal, olfactory, lens, trigeminal, profundal, otic, epibranchial and lateral line placodes. While distinct in the derivatives and cell types they will form, all cranial placodes originate from a common preplacodal domain surrounding the anterior neural plate. Recent evidence suggests that the induction of this pre-placodal domain and its subsequent subdivision into individual placodes with specific identities is a multi-step process. Here we describe the development of these placodes and their derivatives and summarize recent advances in the characterization of the repertoire of transcription factors underlying their development. We also review recent studies that have started to address the role of several classes of signaling molecules in placode induction and segregation, including Bone Morphogenetic Proteins, Fibroblast Growth Factors and Wnt molecules. Table of Contents: Introduction / Cranial Placodes and Their Derivatives / Molecular Identity of Cranial Placodes / Induction and Segregation of the Cranial Placodes / Conclusion / Acknowledgments / References / Author Biographies
Lammert, M., & Timberlake, E. M. (1986). Termination of foster care for the older adolescent: Issues of emancipation and individuation.
Dou, L., E. Bertrand, C. Cerini, V. Faure, J. Sampol, R. Vanholder, Y. Berland, P. Brunet. ... A. Timberlake, B. Sumpio, R. Pfragner, I. M. Modlin, M. Kidd.
Chendrasekhar A, Moorman DW, Timberlake GA. An evaluation of the effects of ... Chittiboina P, Wylen E, Ogden A, et al. Traumatic spondylolisthesis of the ...
Hartmann LC, Radisky DC, Frost MH, et al. Understanding the premalignant potential of ... D'Alfonso TM, Wang K, Chiu YL, et al. Pathologic upgrade rates on ...
Stensland, J., Speedie, S., Ideker, M., House, J., & Thompson, T. (1999). The relative cost of outpatient ... Deal, J. L. (1987). Appraisal and diagnosis of ...
1 2 Howard, S. and Johnson, B. (2000) Resilient and Non-resilient Behaviour in ... 4 De Haan, L., Hawley, D. and Deal, J. (2002) 'Operationalizing family ...
... are not fluent in the language/s of the medical care provider.72 Research ... Anglo-Americans have traditionally placed a great deal of emphasis on the ...
This practical guide thoroughly discusses both well-established and new interventions that are applied to the spine for the purpose of pain relief.
Several versions of Pearson's MyLab & Mastering products exist for each title, including customized versions for individual schools, and registrations are not transferable.
If a picture paints a thousand words, imagine what video can do? Pearson Medical Assisting Videos help users learn the nuances and the details of many medical assisting procedures.