About this deal
The muscles of the neck are closely related to a number of important structures that pass between the thorax and the head, including major blood vessels, nerves and elements of the respiratory and gastrointestinal systems. Regardless of its morphology or type, muscle tissue is composed of specialized cells known as muscle cells or myocytes(myo- [muscle, Greek = mys]), commonly referred to as muscle fibers (all of these terms are interchangeable); this is due to their extensive length and appearance. It arises from the superior part of the manubrium of sternum and the posterior surface of the medial end of the clavicle.
When the body drifts off into sleep, it undergoes physiological changes related to body temperature, breathing rate and muscular tone. Obliquus capitis inferior, that arises from the spinous process of axis and inserts on the transverse process of atlas. 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.MuscleStrap – Rapture Shows You What To Do With A Dick MuscleStrap - Rapture, Austin Lynn - Rapture and Austin Strap-On The Slave (Parts 1 and 2) MuscleStrap - Sr. The function of the sternocleidomastoid muscle depends on whether the muscle acts alone or together with its contralateral counterpart.
The platysma is innervated by the cervical branch of facial nerve (CN VII), and vascularized by the submental branch of the facial artery, and suprascapular branch of the thyrocervical trunk. Due to their small size, the function of these muscles is to only assists in lateral flexion of the head and to stabilize the cervical spine during movement. The function of the splenius muscles is to extend the head when contracted bilaterally, whereas unilateral contraction produces lateral flexion and rotation of the head to the same side.
The splenius capitis originates from the spinous processes of vertebrae C7-T3 and the nuchal ligament, and inserts just below the lateral superior nuchal line of the occipital bone, and the mastoid process of temporal bone. 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. 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. Myocytes however, are characterized by a particular abundance of these proteins within their cytoplasm, so much so that they occupy most of their interior.
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.The anterior belly is innervated by the nerve to mylohyoid, a branch of the inferior alveolar nerve, while the posterior belly receives innervation from the digastric branch of the facial nerve. Generally, the main function of these muscles is positioning of the hyoid bone and coordination of the movements of the floor of the mouth and the hyoid bone while swallowing or vocalization. Thyrohyoid, omohyoid and sternothyroid receive supply from branches of the superior thyroid and lingual arteries 5.