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 | | Figure 12.4(1) Three Views of Neurulation in an Amphibian Embryo | | | Figure 12.4(3) Three Views of Neurulation in an Amphibian Embryo | | | Figure 12.4(2) Three Views of Neurulation in an Amphibian Embryo |
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http://www.csun.edu/~vcbio001/lect6.html
(388 words)
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| | Bio 361 |
| | In this defect, closure of the neural tube is delayed, resulting in abnormal development of bone, muscle and skin around the brain and spinal cord. | | | The process of neurulation is of major scientific interest because of the prevalence of a congenital malformation known as spina bifida. | | | This type of neurulation is known as secondary neurulation. |
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http://www.bakeru.edu/faculty/chenry/devbio12A.htm
(550 words)
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| | Student project by Amy French |
| | Figure 1: The pathway from gastrulation to neurulation involving the Churchill crossroad. | | | This article was focused on determining which protein is responsible for the transition from gastrulation to neurulation when many of the same proteins are present at each stage. | | | The researchers identified at least one step in the very complex pathway of neurulation, that of the switch from gastrulation to neurulation. |
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http://www.unr.nevada.edu/~afrench/french
(1571 words)
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| | lec10.html |
| | Amphibian Neurulation AND Experimental Analysis of Gastrulation and Neurulation | | | This change in adhesion molecules may result in the loss of adhesion to the epidermal cells. | | | The following concepts help in asking questions about the mechanism of development occurring in the gastrula and neurula stages. |
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http://www.msu.edu/~kopachik/zol320/website/notes/lec10.html
(1267 words)
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| | UNSW Embryo- Neural Selected References |
| | Further research, utilizing a panoply of approaches, is necessary to resolve this issue. | | | Such forces are generated by fundamental cell behaviors such as changes in cell shape, position and number. | | | In addition, morphoregulatory molecules expressed during neurulation underlie induction and patterning of the forming neuraxis. |
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http://embryology.med.unsw.edu.au/Refer/neuron/select.htm
(452 words)
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| | Germ Layers and Differentiation of Tissues |
| | The primary difference found in mammals is the development of the umbilical cord, which contains allantois and yolk sac as well as circulatory system structures that connect the embryo to the placenta. | | | One difference between amphibian neurulation and chick neurulation is that the process proceeds from anterior end to posterior end, with the anterior end becoming far more developed. | | | The early stages of development of the mammalian embryo, such as primitive streak stage, neurulation and germ layer differentiation, are similar to that occurring in chickens and reptiles. |
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http://acad.udallas.edu/biology/Brown/Anatomy/04GermLayers.html
(1067 words)
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| | NEURULATION: THE FORMATION OF THE CENTRAL NERVOUS SYSTEM |
| | The internally positioned neural tube, which will form the brain and spinal cord. | | | The objective of this course is to impart an understanding of the development of the neural tube, and the mechanisms controlling this process. | | | During neurulation the original ectoderm is divided into three sets of cells:- |
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http://www.bi.umist.ac.uk/users/mjfssaw/3DEV/NEURULATION.htm
(3352 words)
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| | [No title] |
| | Handout: Representative stages of neurulation in the frog embryo. | | | Now one can see the inductive interactions between some of these newly-associated groups of cells. | | | It is important that you learn how to read serial cross sections; the future material is much more confusing than this! |
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http://www.csc.edu/mathsci/akrejci/BIOL432-532/frog3.htm
(950 words)
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| | eMedicine - Neural Tube Defects : Article by George Jallo, MD |
| | Another possible explanation is that open NTDs (spina bifida in particular) result from defects in either primary or secondary neurulation, depending on their site being cranial or caudal to the posterior neuropore (ie, upper and lower spina bifida, respectively). | | | Parallel to this process, the cutaneous ectoderm separates from the neuroectoderm to form the overlying skin, while the lateral mesoderm migrates between the 2 ectodermal layers to form the posterior vertebral arches. | | | Closed NTDs are localized and confined to the spine (brain rarely affected) and result from a defect in secondary neurulation. |
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http://www.emedicine.com/neuro/topic244.htm
(2853 words)
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| | Chapter 14B. Neurulation and Limb Development |
| | Thanks to David Marcey for construction of some of the images shown above | | | Neurulation in vertebrates results in the formation of the neural tube, which gives rise to both the spinal cord and the brain. | | | During neurulation, somites form in pairs flanking the neural tube. |
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http://biology.kenyon.edu/courses/biol114/Chap14/Chapter_14B.html
(828 words)
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| | Neural tube - Wikipedia, the free encyclopedia |
| | In primary neurulation, the neural plate creases inward until the edges come in contact and fuse. | | | Primary neurulation occurs in response to soluble growth factors secreted by the notochord. | | | Portions of the neural tube form by two different processes, called primary and secondary neurulation. |
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http://en.wikipedia.org/wiki/Neural_tube
(366 words)
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| | Declarative modeling of a neurulation-like process |
| | In this example, we will see haw MGS can be used to model phenomena such as neurulation. | | | This phenomena happens during embryogenesis and is called neurulation. | | | The neurulation process consists in a topological modification of the back region of the embryo (cf figure above): the neural plate is folding and forms the neural fold. |
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http://mgs.lami.univ-evry.fr/ImageGallery/EXEMPLES/Neurulation
(1084 words)
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| | Pharyngula::Neurulation in zebrafish |
| | Neurulation has been a somewhat messy phenomenon for comparative embryology, too, because there are not only subtle differences between different vertebrate lineages in precisely how they segregate the neural tissue, but there are also differences along the rostrocaudal axis of an individual organism. | | | Neurulation is a series of cell movements and shape changes, inductive interactions, and changes in gene expression that partitions tissues into a discrete neural tube. | | | The ready interchange of epithelium and mesenchyme is something we also see elsewhere, in gastrulation: some organisms form mesoderm by delamination and migration of mesenchyme, others by the more coherent ingression of epithelial sheets. |
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http://pharyngula.org/index/weblog/comments/neurulation_in_zebrafish
(2686 words)
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| | [No title] |
| | Xenopus, however, have limitations as a model system for shroom research. | | | Failure of neurulation results in the occurrence of human neural tube defects such as spina bifida, which is often debilitating, and anencephaly, which is usually fatal. | | | Since it has been suggested that apical constriction occurs during neurulation in zebrafish and shroom has been shown to induce apical constriction, it is expected that shroom expression will be visible in the neural tube during zebrafish neurulation, which would allow for further shroom gene analysis to be performed on this model organism. |
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http://cns.utexas.edu/urp/files/04-Abstracts/16-Julie-Hayes.doc
(476 words)
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| | Lecture 10 |
| | Neurulation is the formation of the neural tube, which gives rise to both the spinal cord and the brain. | | | The ectoderm gives rise to two major body components -- the epidermis, which is the outer layer of the skin, and the nervous system (G, 12.1). | | | --As a result of the neurulation process, the apical surface of the epithelial cells is inside, facing the lumen. |
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http://mcdb.colorado.edu/courses/4650/lecture10.html
(1044 words)
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| | Neurulation in amniote vertebrates: a novel view deduced from the use of quail-chick chimeras |
| | Neurulation in amniote vertebrates: a novel view deduced from the use of quail-chick chimeras | | | During both these processes, gastrulation continues by the caudal regression of Hensen's node – also called cordoneural hinge in the secondary neurulation. | | | Caudally to the organizer, both in primary and secondary neurulation, the presumptive territory of the alar plates of the future neural tube overlies the precursors of the paraxial mesoderm. |
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http://www.ijdb.ehu.es/abstract.9807/a909.htm
(157 words)
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| | Control of neurulation by the nucleosome assembly protein-1−like 2 - Nature Genetics |
| | Neurulation is a complex process of histogenesis involving the precise temporal and spatial organization of gene expression | | | Nap1l2 therefore likely represents a class of tissue-specific factors interacting with chromatin to regulate neuronal cell proliferation. | | | Genes influencing neurulation include proneural genes determining primary cell fate, neurogenic genes involved in lateral inhibition pathways and genes controlling the frequency of mitotic events. |
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http://www.nature.com/ng/journal/v25/n4/abs/ng0800_431.html;jsessionid=A1C71CABB7D68ADF879ADF347C959C84
(266 words)
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| | Neurulation: Introduction |
| | Neurulation accomplishes three major things in higher vertebrates: |
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http://worms.zoology.wisc.edu/frogs/neuru/neurul_intro.html
(65 words)
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| | Neural tube closure |
| | We are continuing these studies and are also now examining molecules that control other critical events during neurulation. | | | Disruption of Xdsh signaling therefore provides a specific tool for uncoupling convergent extension from other processes of neurulation. | | | Axolotl neurulation is quite robust and closely resembles mammalian neurulation (time-lapse movies here). |
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http://www.zo.utexas.edu/faculty/wallingford/Pages/xdsh.ntd.html
(460 words)
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| | amphibian neurulation |
| | The following images illustrate the major changes that occur during normal neurulation of amphibian embryos, as observed from the exterior. | | | Eventually the neural folds will close over the neural plate and fuse, creating a closed neural tube which will give rise to the central nervous system. | | | At this stage of early neurulation, when the embryo is about two and a half days old, the neural folds are moving towards the midline. |
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http://muhlenberg.edu/depts/biology/courses/bio240/amphibian.html
(320 words)
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| | Profile |
| | Study of genes contributing to the morphogenetic movements of gastrulation and neurulation. | | | Colas JF, Schoenwolf GC, Localization of cartilage linking protein 1 during primary neurulation in the chick embryo, Brain Research. | | | Chick and Drosophila Embryos, Developmental Biology, Embryonic Morphogenesis, Molecular Biology, Neurulation and Gastrulation, Vertebrate and Invertebrate Animal Models. |
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http://myprofile.cos.com/jfcolas
(575 words)
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| | neurulation - OneLook Dictionary Search |
| | neurulation : The On-line Medical Dictionary [home, info] | | | neurulation : Dorland's Illustrated Medical Dictionary [home, info] | | | neurulation : Stedman's Online Medical Dictionary, 27th Edition [home, info] |
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http://www.onelook.com/?w=neurulation
(107 words)
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| | Gastrulation and Neurulation |
| | • Secondary neurulation is the development of the nervous system caudal to the site of closure of the caudal neuropore. | | | The site of closure is approximately opposite somites 30/31 (the S2 level). | | | The primitive streak has regressed and forms a pluripotent mass of cells called the caudal eminance or end bud. |
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http://www.ucsf.edu/nreview/01-Embryology/GastruNeurulation.html
(873 words)
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| | Neurulation |
| | Dividing neuroepithelial cells are located near lumen (ependymal cells) while those in S phase are distal to lumen | | | Secondary neurulation: continued ventral movement of blastopore lip produces tail (chordoneural hinge) |
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http://www.people.memphis.edu/~clessman/NEURULA.HTM
(115 words)
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| | Neurulation in Urodeles: The Notoplate |
| | Antone Jacobson and his colleagues named this region the "notoplate". | | | Jacobson and colleagues have suggested that this may contribute to the closure of the neural tube via a process engineers call "Poisson buckling". | | | At the outset of neurulation, a central, posterior region of the neural plate undergoes dramatic elongation via convergent extension. |
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http://worms.zoology.wisc.edu/frogs/neuru/neurunoto.html
(71 words)
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| | Sex difference in mouse embryonic development at neurulation -- Seller and Perkins-Cole 79 (1): 159 -- Reproduction |
| | Sixty-seven mouse embryos from 10 litters collected on the morning of Day 9 of gestation, when neurulation is beginning, were classified according to the precise stage of development reached, and sex-chromatin analysis was performed on the yolk sac. | | | Sex difference in mouse embryonic development at neurulation | | | Sex difference in mouse embryonic development at neurulation -- Seller and Perkins-Cole 79 (1): 159 -- Reproduction |
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http://www.reproduction-online.org/cgi/content/abstract/79/1/159
(236 words)
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| | neurulation |
| | Neurulation includes the formation of the neural plate (day 18-19), neural folds (day 20-21), and the neural tube (day 22-26); the latter will develop into the future brain and spinal cord | | | Thus, the neural tube begins its development intercalated in the primitive ectoderm but, like the notochord, eventually detaches to form a closed tube. | | | The neural plate forms as a central strip of surface ectoderm cells, just above the notochord. |
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http://sprojects.mmi.mcgill.ca/embryology/earlydev/week3/neurulation.html
(410 words)
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| | Gastrulation Neurulation |
| | cellular response changing ectoderm cells to neural cells called NEURULATION | | | The action be which the notochord instructs the ectoderm to become neural tube is called PRIMARY EMBRYONIC INDUCTION | | | Formation of the neural tube does not occur simultaneously throughout ectoderm |
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http://www.zoo.ufl.edu/ljg/gastrulation_neurulation.htm
(611 words)
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| | Neurulation |
| | Study Hint: To picture neurulation, think of the neural folds as 2 parallel mountains. |
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http://cats.med.uvm.edu/cats_teachingmod/embryology/1_3/week_3/neurulation.html
(214 words)
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| | Neurulation |
| | Secondary neurulation is when the neural tube arises from a solid cord of cells that sinks into the embryo and subsequently hollows out (cavitates) to form a hollow tube. | | | Primary neurulation is the formation of the neural tube by invagination and pinching off of the neural plate to form a hollow tube. |
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http://www-personal.umich.edu/~segelj/Neurulation.htm
(287 words)
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| | neurulation : Definition |
| | Search for neurulation in these other databases too |
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http://www.everythingbio.com/glos/definition.php?word=neurulation
(132 words)
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| | [No title] |
| | plate, ectoderm connection) hinges serve as pivotal points for forces exerted by ecto.e ÿ• ÿÿd d ÿ— ÿÿd d ÿ— ÿÿd d B ÿ• ÿÿd d 9 ÿ• ÿÿd d @ ÿ• ÿÿd d H ÿ• ÿÿd d : ÿ• ÿÿd d ls secondary neurulation: solid tub4 2 3 1 A `úpö àþ ýÿ E£Ðùpÿ0 Wýÿ , W ' s V 9 0 0 ÿÿ 2 úÿ÷t ÿ• ÿÿd d 9 7 ÿÿ 8 6 | | | invaginate > pinch off from surface characteristic of birds, mammals secondary neurulation: solid tube sinks into embryo > cavitates characteristic of fishes (and posterior regions of birds, mammals) b ÿ• ÿÿd 0 d " ÿ• ÿÿd 0 d @ ÿ• ÿÿd 0 d B ÿ• ÿÿd 0 d WOW WOW WOW WOW WOW A `úpö àþ ýÿ E£Ðùpÿ0 Wýÿ $W ' s V 9 0 0 ÿÿ 2 úÿ÷t ÿ• ÿÿd d ÿÿ |
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http://www.uwgb.edu/bauera/angiesweb/DevBio/Neurulation.PPT
(418 words)
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| | Emedicine Search Results for neurulation |
| | Neural Tube Defects - Neural tube defects (NTD) occur because of a defect in the neurulation process. | | | Click another Tab to find results in that category. |
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http://www.emedicine.com/cgi-bin/foxweb.exe/searchengine@/em/searchengine?boolean=and&book=all&maxhits=100&HiddenURL=&query=neurulation
(143 words)
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| | Developmental Biology Online: Avian Neurulation |
| | This animation of primary neurulation in the chick embryo allows one to follow the movements that give rise to the neural tube and neural crest. | | | The colors are coded as they are in textbook Figure 13.1. | | | HOME :: CHAPTER 13 :: AVIAN NEURULATION :: AVIAN NEURULATION |
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http://www.devbio.com/article.php?ch=13&id=137
(103 words)
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| | WebStatistics < LO < TWiki |
| | 283 [[WebStatistics]]
203 [[WebHome]]
171 [[WebRss]]
107 [[LearningObjectWorkshop]]
andnbsp;95 [[WaterWays]]
andnbsp;92 [[MonArch]]
andnbsp;80 [[LearningObjectCatalog]]
andnbsp;72 [[InstrumentMuseum]]
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http://twiki.wesleyan.edu/cgi-bin/view/LO/WebStatistics?raw=on
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