(n.) A muscular segment; one of the zones into which the muscles of the trunk, especially in fishes, are divided; a myocomma.
(n.) One of the embryonic muscular segments arising from the protovertebrae; also, one of the protovertebrae themselves.
(n.) The muscular system of one metamere of an articulate.
Example Sentences:
(1) To improve the slightly disappointing voice rehabilitation results of the myotomized laryngectomees, a modified myotomy is proposed.
(2) Root anatomy and the concept of myotomes and dermatomes are reviewed, as is the pathophysiology of radiculopathy.
(3) The possible relationship of these data with the appearance of mononucleated differentiated cells in myotomes in vivo and the possible neural control of this stage of myogenesis are discussed.
(4) Parasagittal sections of the caudal myotomes of 10.5-d-old embryos showed that expression of contractile proteins preceded the expression of myogenin or MyoD and, when coexpressed, MHC and myogenin did not co-localize within all the cells of the myotome.
(5) "Ventral nerves" are seen on the midmedial surface of each myotome.
(6) The dermatomal and myotomal dissociation has been well-documented on the ipsilateral side, but involvement of the contralateral side is rare.
(7) Cells of the presumptive myotome layer in the unsegmented region of the mesoderm were also electrically coupled.
(8) Serial sections of stage 18-27 HH (3-5 days of incubation) chick embryo myotomes were investigated by electron microscope.
(9) The map may be important for the proper control of the many muscles arising from the myotomes in amniotes because it facilitates the development and evolution of motor systems in which anatomically and functionally different muscles have spatially separate motor pools in the cord.
(10) Using isoform-specific 35S-labeled antisense cRNA probes for in situ hybridization, we have detected BCK mRNAs in embryonic mouse and chick myotomes, the first skeletal muscle masses to form in developing embryos.
(11) In detailed examination of alpha Enhb-1 and 4D9 localization, we find previously undetected patterns of En protein localization in the prechordal plate, hindbrain, myotome, ventral body-wall mesoderm, and extraembryonic membranes.
(12) At early somite stages, FGFR-4 was also expressed in the myotomal component of the somite, and by 14.5 days p.c.
(13) The notochord and neural tube are well developed by 3 days and surrounded by sclerotome, myotome, and dermatome cells.
(14) At least 6-10 functional spinal segments and adjacent myotomes are required for early swimming.
(15) Microsomes were isolated from fresh and frozen myotomal tissue of Atlantic cod by two procedures.
(16) We found a spatial relationship between the three myotomal muscle fiber types and the corresponding motoneurons.
(17) At the onset of metamorphosis (stage 48-50) the myotome muscle becomes multinucleate, possibly by fusion with satellite cells at the ends of the fibres, and has the appearance of adult skeletal muscle.
(18) Functional changes of acetylcholine receptor (AChR) channels in embryonic Xenopus myotomal muscle cells were examined during their development in culture.
(19) In the two species, coexpression of alpha-sr and alpha-sm actins has been observed in cardiomyoblasts, myotomal myoblasts and myotubes.
(20) In the mouse, BCK transcripts are expressed in myotomes at 8.5 days post coitum (p.c.
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.