What are Epimeric muscles?
epimeric muscle. a muscle derived from an epimere and innervated by a posterior ramus of a spinal nerve.
What is the difference between hypaxial and epaxial muscles?
The epaxial muscles are innervated by the dorsal branches of the spinal nerves and comprise the intrinsic (deep) back muscles, while the hypaxial muscles are innervated by the ventral branches of the spinal nerves including the plexus and consist of a heterogeneous group of intercostal, abdominal, and limb as well as …
What are the epaxial muscles in humans?
Epaxial muscles include other (dorsal) muscles associated with the vertebrae, ribs, and base of the skull. In humans, the erector spinae, the transversospinales (including the multifidus, semispinalis and rotatores), the splenius and suboccipital muscles are the only epaxial muscles.
What is Somates?
Somites are precursor populations of cells that give rise to important structures associated with the vertebrate body plan and will eventually differentiate into dermis, skeletal muscle, cartilage, tendons, and vertebrae.
What does Epimere give rise to?
Epimere definition The dorsal portion of the mesodermal mass in the early development of chordate embryos that gives rise to the skeletal muscles.
What is dermatome and myotome and sclerotome?
These cells differentiate into the following 3 regions: (1) myotome, which forms some of the skeletal muscle; (2) dermatome, which forms the connective tissues, including the dermis; and (3) sclerotome, which gives rise to the vertebrae.
What is the difference between a sclerotome and dermatome?
The sclerotome forms the vertebrae and the rib cartilage and part of the occipital bone; the myotome forms the musculature of the back, the ribs and the limbs; the syndetome forms the tendons and the dermatome forms the skin on the back.
What is meant by sclerotome?
Medical Definition of sclerotome : the ventral and mesial portion of a somite that proliferates mesenchyme which migrates about the notochord to form the axial skeleton and ribs.
What is Epimere Mesomere and Hypomere?
* Mesoderm – becomes organized into three regions: the epimere (dorsal mesoderm), mesomere (intermediate mesoderm), and hypomere (lateral mesoderm). – Epimere: The somites constitute most of the dorsal mesoderm and have three regions: dermatome – forms the dermis of the mid-dorsal skin.
What is a sclerotome in anatomy?
The sclerotome is a transient, embryonic tissue composed of pluripotent, mesenchymal stem cells located in the ventromedial region of the somite. From: Current Topics in Developmental Biology, 2019.
What is prechordal plate embryology?
The prechordal plate is a thickening in the endodermal layer which is formed by mesendodermal cells from the primitive node that migrate rostrally along the midline between the ectoderm and endoderm layers.
Is Mesomere and mesoderm same?
Mesomere: The original mesoderm differentiates into three sections. The mesomere is the middle section. It is fated to further differentiate into the kidney and urogenital structures. Myotome: The somites split, roughly axially, into three segments, the middle one of which is the myotome.
What is the epaxial musculature?
Subsequently, the segmentally‐arranged epimeric muscles fuse, forming the extensor muscles of the vertebral column, comprising the transverso‐spinalis system, the longissimus system and the ileo‐costalis system. Collectively, the muscles of these systems are referred to as the epaxial musculature.
What is epimerization and epimers?
Epimerization is the interconversion of one epimer to the other epimer. Doxorubicin and epirubicin are two epimers that are used as drugs. The stereoisomers β- D – glucopyranose and β- D – mannopyranose are epimers because they differ only in the stereochemistry at the C-2 position.
What is the musculature of the body?
Muscular system. Skeletal, cardiac and smooth muscle, which develop from mesoderm, comprise the musculature of the body. Skeletal musculature is derived from paraxial mesoderm which, in the cranial region, forms somitomeres and, in the regions caudal to the otic placodes, forms somites.
What is the difference between an anomeric carbon and an epimer?
In the case that the difference is the -OH groups on C-1, the anomeric carbon, such as in the case of α- D -glucopyranose and β- D -glucopyranose, the molecules are both epimers and anomers (as indicated by the α and β designation). Other closely related compounds are epi -inositol and inositol and lipoxin and epilipoxin .