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The head rests on the top part of the vertebral column, with the skull joining at C1 (the first cervical vertebra known as the atlas). The skeletal section of the head and neck forms the top part of the axial skeleton and is made up of the skull, hyoid bone, auditory ossicles, and cervical spine. The skull can be further subdivided into:
The triangles of the neck describe the divisions created by the major muscles in the region.. The side of the neck presents a somewhat quadrilateral outline, limited, above, by the lower border of the body of the mandible, and an imaginary line extending from the angle of the mandible to the mastoid process; below, by the upper border of the clavicle; in front, by the middle line of the neck ...
Scalene muscles; Sphenomandibularis; Splenius capitis muscle; Stapedius muscle; Sternocleidomastoid muscle; Sternohyoid muscle; Sternothyroid muscle; Styloglossus; Stylohyoid muscle; Stylopharyngeus muscle; Suboccipital muscles; Superior auricular muscle; Superior longitudinal muscle of tongue; Superior oblique muscle; Superior pharyngeal ...
clavicular head: anterior surface of medial half of clavicle sternocostal head: anterior surface of sternum, superior six costal cartilages: intertubercular groove of humerus: pectoral branch of thoracoacromial artery: lateral pectoral nerve, medial pectoral nerve clavicular head: C5 and C6 sternocostal head: C7, C8 and T1
The neck is the part of the body in many vertebrates that connects the head to the torso. It supports the weight of the head and protects the nerves that transmit sensory and motor information between the brain and the rest of the body. Additionally, the neck is highly flexible, allowing the head to turn and move in all directions.
The suboccipital triangle is a region of the neck bounded by the following three muscles of the suboccipital group of muscles: Rectus capitis posterior major - above and medially; Obliquus capitis superior - above and laterally; Obliquus capitis inferior - below and laterally
The facial muscles are just under the skin (subcutaneous) muscles that control facial expression. They generally originate from the surface of the skull bone (rarely the fascia), and insert on the skin of the face. When they contract, the skin moves. These muscles also cause wrinkles at right angles to the muscles’ action line. [2]
The platysma muscle is a broad sheet of muscle arising from the fascia covering the upper parts of the pectoralis major muscle and deltoid muscle. Its fibers cross the clavicle, and proceed obliquely upward and medially along the side of the neck. This leaves the inferior part of the neck in the midline deficient of significant muscle cover. [1]