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Learn about the bones, muscles, skin, teeth, mouth, and other structures of the head and neck region of the human body. This article covers the anatomy, function, and clinical aspects of the head and neck.
The sternocleidomastoid muscle is a large and superficial neck muscle that originates from the sternum and clavicle and inserts at the skull. It rotates the head to the opposite side and flexes the neck, and is innervated by the accessory nerve.
The hyoid bone is a horseshoe-shaped bone in the neck that supports the tongue and larynx. It is the only bone in the human body that is not connected to any other bones and has a complex structure and development.
The epicranial aponeurosis is a tough layer of dense fibrous tissue that covers the upper part of the skull in humans and many other animals. It originates from the occipital bone and attaches to the frontalis, auricular, and zygomatic muscles, and is involved in subgaleal haemorrhage.
The infrahyoid muscles are a group of four pairs of muscles in the anterior part of the neck that depress the hyoid bone and larynx. They are innervated by the ansa cervicalis or the cervical spinal nerve and originate from or insert on the hyoid bone.
Learn about the structure and function of the neck, the part of the body that connects the head with the torso. The neck contains the cervical vertebrae, spinal cord, trachea, thyroid gland, carotid arteries and veins, and various muscles that support the head and enable speech and swallowing.
The splenius capitis is a broad, straplike muscle in the back of the neck that pulls on the base of the skull from the vertebrae. It is involved in movements such as shaking the head, and is innervated by the posterior ramus of spinal nerves C3 and C4.
The occipitalis muscle is a thin and quadrilateral muscle that covers parts of the skull. It is part of the occipitofrontalis muscle and moves the scalp back. Learn about its origin, insertion, innervation, blood supply and anatomical terms.
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