Grounded on academic literature and research, validated by experts, and trusted by more than 4 million users. The stylohyoid is a thin muscle that extends between the temporal and hyoid bones. It originates from the posterior surface of the styloid process of temporal bone and passes anteroinferiorly and medially to attach on the body of hyoid bone. A convergent (a.k.a. triangular) muscle has a broad origin with fascicles converging toward a single tendon of insertion. Such a muscle is triangular or fan shaped. One example is the pectoralis major muscle of the anterior thorax. A large group of muscles in the cervical area, responsible for the movement of the head in all directions

M.H. Stone, M. Stone and W.A. Sands: Principles and Practice of Resistance Training, 1st edition, (2007), p. 175-182. Muscular dystrophy is a group of muscle diseases that weaken the musculoskeletal system and hamper locomotion. Muscular dystrophies are characterized by progressive skeletal muscle weakness, defects in muscle proteins, and the death of muscle fibres (muscle cells) and tissue. Striated muscle can be further subdivided into three classifications based on its location and morphology: The longus capitis is a long, flat muscle that arises from the anterior tubercles of transverse processes of vertebrae C3-C6 as four thin muscle strips. These muscle strips travel superiorly and medially to insert onto the inferior surface of the basilar part of the occipital bone.All content published on Kenhub is reviewed by medical and anatomy experts. The information we provide is grounded on academic literature and peer-reviewed research. Kenhub does not provide medical advice. You can learn more about our content creation and review standards by reading our content quality guidelines. Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2014). Clinically Oriented Anatomy (7th ed.). Philadelphia, PA: Lippincott Williams & Wilkins. Skeletal muscle fibers are bound together by loose areolar tissue, known as endomysium (endo- = within) which contains the usual complement of cells such as fibroblasts and macrophages, as well as small nerve and vascular branches. growth in the length of muscle fibers occurs as a result of new sarcomeres being added to the end of existing myofibrils. The posterior belly arises from the medial surface of mastoid notch, a deep groove found on the mastoid process of temporal bone.

The suprahyoid muscles are four muscles located superior to the hyoid bone. They connect the hyoid bone to the mandible and the base of the skull and form the floor of the oral cavity. These muscles include the digastric, mylohyoid, geniohyoid and stylohyoid muscles. It’s also worth noting there are several other contractile cells which resemble smooth muscle cells (either morphologically and/or functionally) however are not classed as such. Examples include: Sinnatamby, C. S., & Last, R. J. (2011). Last's anatomy: Regional and applied. (12th edition). Edinburgh: Churchill Livingstone. The innervation of this muscle comes from the anterior rami of spinal nerves C1 and C2, while its blood supply is provided by branches of the vertebral and ascending pharyngeal arteries. All models were 18 years of age or older at the time of depiction. Porn40.com has a zero-tolerance policy against illegal pornography.The anterior scalene muscle is innervated by the anterior rami of the spinal nerves C4-C6, and vascularized by the ascending cervical branch of inferior thyroid artery. When the body drifts off into sleep, it undergoes physiological changes related to body temperature, breathing rate and muscular tone. Hypnic jerks may be the result of muscle changes. Another theory suggests that the transition from the waking to the sleeping state signals the body to relax. But the brain may interpret the relaxation as a sign of falling and then signal the arms and legs to wake up. Electroencephalogram studies have shown sleep starts affect almost 10 percent of the population regularly, 80 percent occasionally, and another 10 percent rarely. The posterior scalene is the smallest and most posterior of the scalene muscles that arises from the posterior tubercles of transverse processes of cervical vertebrae C4-C6. It then extends posterolaterally and inserts into the external surface of the second rib. The nerve supply to the omohyoid is provided by the ansa cervicalis. Its blood supply stems from the superior thyroid branch of the external carotid artery, and inferior thyroid branch of the thyrocervical trunk.