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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 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]
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
Anatomy of the human head. The human head consists of a fleshy outer portion, which surrounds the bony skull. The brain is enclosed within the skull. There are 22 bones in the human head. The head rests on the neck, and the seven cervical vertebrae support it. The human head typically weighs between 2.3 and 5 kilograms (5.1 and 11.0 lb) Over 98 ...
It merges with the occipitofrontalis muscle. In front, it forms a short and narrow prolongation between its union with the frontalis muscle (the frontal part of the occipitofrontalis muscle). On either side, the epicranial aponeurosis attaches to the anterior auricular muscles and the superior auricular muscles .
The function of this muscle is to rotate the head to the opposite side or obliquely rotate the head. [4] It also flexes the neck. [4] When both sides of the muscle act together, it flexes the neck and extends the head. When one side acts alone, it causes the head to rotate to the opposite side and flexes laterally to the same side (ipsilaterally).
The purpose of these muscles is to provide fine motor function in movements of the head. The actions of trapezius, sternocleidomastoid and other larger muscles that move the head are refined by the relatively small suboccipital triangle muscles.
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