Question

What is Muscles of the Neck and Trunk

Answer 1

The muscles of the neck and trunk develop from the myotomes which are derived from the somites. During the 5th week, of development each myotome be­comes divided into two parts, each re-. presenting a muscular mass. The subdi­visions of the myotomes are: (1) a
smaller, dorsal part called epaxial di­vision or epimere, and (2) a larger, ventral part called hypaxial division or hypomere. Each developing spinal nerve also divides into a posterior primary ramus that gives nerve sup­ply to the epimere, and an anterior primary ramus that innervates the hypomere.