Admin Table of Contents
What are the differences between dermatome myotome and Sclerotome?
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 a myotome?
The anatomical term myotome refers to the muscles served by a spinal nerve root. A myotome is, therefore, a set of muscles innervated by a specific, single spinal nerve. The term is also used in embryology to describe that part of the somite which develops into the muscles. Each vertebrae has a spinal nerve.
How many Dermatomes and Myotomes are there?
A dermatome is an area of skin that is mainly supplied by a single spinal nerve. There are 8 cervical nerves (note C1 has with no dermatome), 12 thoracic nerves, 5 lumbar nerves and 5 sacral nerves.
What is the difference between somites and Somitomeres?
In the developing vertebrate embryo, the somitomeres (or somatomeres) are cells that are derived from the loose masses of paraxial mesoderm that are found alongside the developing neural tube….Somitomere.
| Somitomeres | |
|---|---|
| Details | |
| Gives rise to | somites |
| Identifiers | |
| Latin | somitomera |
What is Epimere and Hypomere?
Epimere – Segment of myotome that is dorsal to the body axis. Hypomere – Segment of myotome that is ventral to the body axis. Myotome – That part of the somite that gives rise to the skeletal muscle cells.
What is a myotome dermatome?
A group of muscles that is innervated by the motor fibers that stem from a specific nerve root is called a myotome. An area of the skin that is innervated by the sensory fibers that stem from a specific nerve root is called a dermatome. This consistency allows doctors to treat nerve pain in patients.
What is myotome in fish?
The study focused on the myotome (a group of muscles served by a spinal nerve root) that makes up most of the fish body. These fish muscles power the fish’s side-to-side swimming motion and the chevron pattern is thought to increase swimming efficiency.
How do Myotomes work?
The muscle movement of each myotome is controlled by motor nerves coming from the same motor portion of a spinal nerve root. This differs from a dermatome, which is a zone on the skin in which sensations of touch, pain, temperature, and position are modulated by the same sensory portion of a spinal nerve root.
What is notochord in zoology?
notochord, flexible rodlike structure of mesodermal cells that is the principal longitudinal structural element of chordates and of the early embryo of vertebrates, in both of which it plays an organizational role in nervous system development. In later vertebrate development, it becomes part of the vertebral column.
What is primitive streak?
The primitive streak is a structure that forms in the blastula during the early stages of avian, reptilian and mammalian embryonic development. It forms on the dorsal (back) face of the developing embryo, toward the caudal or posterior end.
How is myotome formed?
The myotome is formed by a first wave of pioneer cells originating from the entire dorsomedial region of epithelial somites and a second wave that derives from all four lips of the dermomyotome but generates myofibers from only the rostral and caudal edges.