What's the difference between sclerotome and somite?
Sclerotome
Definition:
(n.) One of the bony, cartilaginous, or membranous partitions which separate the myotomes.
Example Sentences:
(1) From the survey of another 21 patients having bony abnormalities at the craniovertebral junction, the first type of arterial anomaly described above was seen in 4 patients and associated with failure of segmentation of the embryonic sclerotome such as occipitalization of the atlas or Klippel-Feil syndrome.
(2) In implants of either multiple rostral or caudal somite-halves, the grafted mesoderm dissociates normally into sclerotome and dermomyotome.
(3) In contrast, changes in the prevalence of N-CAM did not strictly accompany the remodeling of the somitic epithelium into dermamyotome and sclerotome.
(4) (2) When the transplantation reversed only the rostrocaudal axis, two days after the operation the rudiments of dorsal root ganglia were formed at the caudal (originally rostral) halves of the transplanted sclerotomes.
(5) In contrast, neural crest cells were never observed in the posterior sclerotome or in the perinotochordal space.
(6) In the remaining 11 cases multiple sclerotomes appeared to be involved and the clinical manifestations were correspondingly more severe.
(7) Adjacent to the caudal half of each somite, these cells penetrated no further than the myosclerotomal border, but opposite the rostral somite half, they were found next to the sclerotome almost as far ventrally as the notochord.
(8) The notochord and neural tube are well developed by 3 days and surrounded by sclerotome, myotome, and dermatome cells.
(9) The principal link in the formation of the viscero-cutaneous and viscero-sclerotomic sensation syndrome are transitory presynaptic terminals formed by the axons of the vegetative sensor neurons (cells of Dogel type 2) on the surface of the somatic receptor neurons innervating the skin and the sclerotomic tissues, and responding to temperature and pain.
(10) The results indicate the presence of three migratory routes in the trunk: (1) a ventral pathway through the anterior sclerotome; (2) a ventral pathway between the neural tube and the posterior sclerotome; and (3) a dorsolateral pathway between the somites and ectoderm.
(11) This extracellular marker was present in the sclerotome and its distribution subsequently followed the segmentation pattern of the precartilaginous vertebral column.
(12) At stage 16, in the posterior trunk region, cRXR transcripts are expressed by cells in the neural crest and in neural crest cells migrating into the sclerotome, indicating that neural crest cells express cRXR transcripts before overt differentiation into peripheral nervous tissue.
(13) It is proposed that melorheostosis may be the late result of a segmental sensory nerve lesion, to account for its sclerotomal distribution.
(14) It is hypothesized that the sclerotomal cells produce a hyaluronate-enriched extracellular matrix which is inflated by hydration to mediate the expansion of the sclerotomal mass towards the notochord.
(15) Immunoblotting analysis showed that cytotactin synthesized by sclerotomes in the absence of NC cells was of similar molecular mass to that produced in their presence.
(16) This third pattern (the ventral path) lies in register with the rostral part of the caudal half of the sclerotome.
(17) The fibrils around the notochord show a spatial arrangement indicating that the sclerotome cells are contact-guided to their subsequent positions.
(18) The time of maximum effect correlates closely with the time of sheath deposition and vacuolization of the notochord, but not to initial formation of the notochord from the mesoblast or later extracellular matrix production by sclerotome cells.
(19) In contrast to those cells migrating through the sclerotome, labelled cells on the dorsolateral pathway were not segmentally arranged along the rostrocaudal axis.
(20) T-cadherin, a novel member of the cadherin family of cell adhesion molecules was selectively expressed in the caudal half of each sclerotome at all times examined.
Somite
Definition:
(n.) One of the actual or ideal serial segments of which an animal, esp. an articulate or vertebrate, is is composed; somatome; metamere.
Example Sentences:
(1) In the present study, we have compared the phosphorylation state of the fibronectin receptor in motile neural crest and somitic cells, in stationary somitic cells, and in Rous-sarcoma virus transformed-chick embryo fibroblasts, using immunoprecipitation following metabolic labeling.
(2) The PGCs were picked up with a fine glass pipette, and one hundred were then injected into the terminal sinuses of 2-day-old Japanese quail embryos (24 somites); bubbles were then inserted to prevent haemorrhage.
(3) The aim of this study is to test the ability of the intrinsic wing musculature to develop in the absence of somitic mesoderm.
(4) At the 10-somite stage, the rhythmical contraction is established and striated myofibrils become distinctly discernible.
(5) Our motility analyses of the chimaeras confirmed that transplanted thoracic somitic mesoderm gives rise to brachial musculature and that the experimental muscles maintained the inherent dystrophic phenotype.
(6) Metabolism studies demonstrated that the early somite embryo possesses a limited capacity to oxidatively metabolize B-OHB.
(7) Metabolic events in somites related to hyaluronic acid are not influenced by the notochord.
(8) In implants of either multiple rostral or caudal somite-halves, the grafted mesoderm dissociates normally into sclerotome and dermomyotome.
(9) Further spreading of the labelled cells to several somites in some cases was probably the result of a more extensive mixing of mesodermal cells among the somitomeres prior to somite segmentation.
(10) However, the hybrid populations tended to have significantly fewer somites and to be significantly larger than the parental populations at comparable stages of facial development.
(11) In the rat embryonic heart, the onset of spontaneous electrical activity and contraction occurs at the three-somite stage.
(12) Thus when the implant consisted of compound cranial half-somites, giant, coalesced ganglia developed, encompassing the entire length of the graft.
(13) Two normal-looking embryos were recovered on the 9th and 10th day (4-somite and ca.
(14) High levels were found in the primitive heart, hepatic diverticulum and septum transversum; lower levels were found in the early somites and other primitive mesenchymal derivatives and midgut endoderm.
(15) This adhesion is then supplemented by the development of tight junctions proximally in the somite.
(16) Our studies span the period between early somite stages and full term.
(17) In contrast, changes in the prevalence of N-CAM did not strictly accompany the remodeling of the somitic epithelium into dermamyotome and sclerotome.
(18) Subsequently, vimentin persists in the endoderm and mesoderm and the tissues derived therefrom, such as the somites and developing heart, throughout the period of study.
(19) myf-5 is the only myogenic factor sequence present in the somite prior to muscle formation and thus is potentially involved in an earlier step of muscle determination.
(20) Adjacent to the caudal half of each somite, these cells penetrated no further than the myosclerotomal border, but opposite the rostral somite half, they were found next to the sclerotome almost as far ventrally as the notochord.