, Arteries which supply the neck are common carotid arteries which bifurcate into: The posterior cervical triangle is bounded by the clavicle inferiorly, sternocleidomastoid muscle anterosuperiorly, and trapezius muscle posteriorly. It is inserted into the oblique line on the lamina of the thyroid cartilage.
Certain cervical vertebrae have atypical features and differ from the general form of a typical vertebra. The longus colli flexes and slightly rotates the cervical portion of the vertebral column. The mylohyoid muscle is flat and triangular and is situated above the anterior belly of the digastric, and it forms, with its fellow of the opposite side, a muscular floor for the oral cavity. Vinod K Panchbhavi, MD, FACS is a member of the following medical societies: American Academy of Orthopaedic Surgeons, American College of Surgeons, American Orthopaedic Association, American Orthopaedic Foot and Ankle Society, Orthopaedic Trauma Association, Texas Orthopaedic AssociationDisclosure: Serve(d) as a speaker or a member of a speakers bureau for: Styker. It is separated from the sternocleidomastoid by the superficial layer or investing layer of the deep cervical fascia and is covered by the platysma, the superficial fascia, and the integument. It arises from the posterior surface of the manubrium sterni, below the fibers of the sternohyoid, and from the edge of the cartilage of the first rib. Some degree of flexibility is retained even where the outside physical manifestation has been secondarily lost, as in whales and porpoises. One of the functions of the neck is to act as a conduit for nerves and vessels between the head and the trunk. The quadrangular area is on the side of the neck and is bounded superiorly by the lower border of the body of the mandible and the mastoid process, inferiorly by the clavicle, anteriorly by a midline in front of the neck, and posteriorly by the trapezius muscle. The spinal column contains about two dozen inter-connected, oddly shaped, bony segments, called … The muscles of the neck can be grouped according to their location. Share cases and questions with Physicians on Medscape consult. As the muscles of the 2 sides pass upward and lateralward, they leave between them a triangular space, in which the recti capitis posteriores minores are seen. This vein receives in its course the inferior petrosal sinus; the common facial, lingual, pharyngeal, superior, and middle thyroid veins; and sometimes the occipital. All material on this website is protected by copyright, Copyright © 1994-2020 by WebMD LLC. Thomas R Gest, PhD is a member of the following medical societies: American Association of Clinical AnatomistsDisclosure: Nothing to disclose. The superior oblique portion arises from the anterior tubercles of the transverse processes of the third, fourth, and fifth cervical vertebrae and, ascending obliquely with a medial inclination, is inserted by a narrow tendon into the tubercle on the anterior arch of the atlas. The clavicle or collar-bone forms the lower limit of the neck, and laterally the outward slope of the neck to the shoulder is caused by the trapezius muscle. It is broad in the middle, narrow and pointed at either end, and consists of 3 portions: superior oblique, an inferior oblique, and a vertical. Superficial dissections of the head and neck as seen in the gallery, show the many different muscles that are required for movement plus those that control facial expression. The obliquus inferior rotates the atlas, and with it the skull, around the odontoid process, turning the face to the same side. At the base of the skull, the glossopharyngeal, vagus, accessory, and hypoglossal nerves lie between the artery and the internal jugular vein. The muscle anatomy of the head and neck is a fascinating area, with the the neck also containing the 7 vertebrae of the part of the spine called the cervical curve.
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