All four of the suboccipital muscles are innervated by the suboccipital nerve (C1), and vascularized by the vertebral artery and the deep descending branches of the occipital artery. Myocytes are characterized by protein filaments known as actin and myosin that slide past one another, producing contractions that move body parts, including internal organs. Interestingly, these proteins are not exclusive to muscle cells; actin and myosin are commonly found as cytoskeletal elements in many cell types and are involved in cellular functions relating to the changing of cell shape (e.g. cell movement, phagocytosis etc.). Myocytes however, are characterized by a particular abundance of these proteins within their cytoplasm, so much so that they occupy most of their interior. Furthermore, in the case of myocytes, actin and myosin filaments are generally oriented along a single axis, thereby eliciting movement in a linear fashion. Myosin is visible as the A band of the sarcomere. Actin filaments are anchored to a structure known as the Z disc (or Z line) located at either end of the sarcomere; they are present across the entire length of the I band (region of actin filaments only, no myosin) and a portion of the A band (region where actin and myosin filaments overlap). The A band is especially important when considering the dynamics of muscle contraction, as it is the location where filament movement occurs. Actin filaments do not extend completely into the A bands, leaving a central region, known as the H zone, which appears slightly lighter than the rest of the A band due to the fact that it does not contain both myofilaments. The center of the H zone has a vertical line, known as the M line, which connects myosin filaments to each other. Posterior surface of manubrium sterni, adjoining parts of clavicle and the posterior sternoclavicular ligament

The intermediate part arises from the anterior surface of bodies of vertebrae C5-T3 and inserts into the anterior surface of bodies of vertebrae C2-C4.

will tell you what to do. They can tell you the right place to get help if you need to see someone. Structure of a sarcomere: Colorado Community College System, https://pressbooks.ccconline.o..., CC4)

Unipennate, in which the fascicles insert into only one side of the tendon, as in the extensor digitorum longus muscle of the leg;M.H. Stone, M. Stone and W.A. Sands: Principles and Practice of Resistance Training, 1st edition, (2007), p. 175-182. Merea, Valeria Silva; Pitman, Michael J. (1 January 2019), Chhetri, Dinesh K.; Dewan, Karuna (eds.), "Chapter 5 - Anatomy and Physiology of the Upper Esophageal Sphincter", Dysphagia Evaluation and Management in Otolaryngology, Elsevier, pp.29–34, doi: 10.1016/b978-0-323-56930-9.00005-x, ISBN 978-0-323-56930-9, S2CID 80855923 A large group of muscles in the cervical area, responsible for the movement of the head in all directions

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 infrahyoid muscles are four muscles located inferior to the hyoid bone, that connect it to the larynx, sternum and scapula. These include the sternohyoid, omohyoid, sternothyroid and thyrohyoid muscles. Speak to a pharmacist about the best treatment for you. They might suggest tablets, or a cream or gel you rub on the skin. Excluding the sternothyroid, the infrahyoid muscles either originate from or insert on to the hyoid bone. [2]Cell-to-cell communication is largely facilitated via gap junctions which are located close to openings in the basement membrane, allowing the regulation and propagation of contractile signals across the smooth muscle tissue. Through these properties, the muscular system as a whole performs several important functions. These include the production of force and movement, support of body stature and position, stability of joints, production of body heat (to maintain normal body temperature), as well as, provision of form to the body. The muscle is innervated by branches of the anterior rami of spinal nerves C1 and C2, and vascularized by the ascending pharyngeal, vertebral and occipital arteries. If you have a sprain or strain that's taking longer than usual to get better, a GP may be able to refer you to a physiotherapist.