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Encyclopedia > Neck
A human neck.
A human neck.

The neck is the part of the body on many limbed vertebrates that distinguishes the head from the torso or trunk. Neck is the body part between the head and torso of many animals. ... Image File history File links Metadata Size of this preview: 460 × 599 pixelsFull resolution‎ (973 × 1,267 pixels, file size: 166 KB, MIME type: image/jpeg) File historyClick on a date/time to view the file as it appeared at that time. ... Image File history File links Metadata Size of this preview: 460 × 599 pixelsFull resolution‎ (973 × 1,267 pixels, file size: 166 KB, MIME type: image/jpeg) File historyClick on a date/time to view the file as it appeared at that time. ... For other uses, see Body (disambiguation). ... Typical classes Petromyzontidae (lampreys) Placodermi - extinct Chondrichthyes (cartilaginous fish) Acanthodii - extinct Actinopterygii (ray-finned fish) Actinistia (coelacanths) Dipnoi (lungfish) Amphibia (amphibians) Reptilia (reptiles) Aves (birds) Mammalia (mammals) Vertebrata is a subphylum of chordates, specifically, those with backbones or spinal columns. ... For other uses of the word head, see head (disambiguation). ... The human torso Torso is an anatomical term for the greater part of the human body without the head and limbs. ...

Contents

Anatomy of the human neck

Bony anatomy: The cervical spine

The cervical portion of the human spine comprises seven bony segments, typically referred to as C-1 to C-7, with cartilaginous discs between each vertebral body. The neck supports the weight of the head and protects the nerves that carry sensory and motor information from the brain down to the rest of the body. In addition, the neck is highly flexible and allows the head to turn and flex in all directions. From top to bottom the cervical spine is gently curved in convex-forward fashion. It is the least marked of all the curves of the column. The vertebral column seen from the side Different regions (curvatures) of the vertebral column The vertebral column (backbone or spine) is a column of vertebrae situated in the dorsal aspect of the abdomen. ... The human brain In animals, the brain (enkephalos) (Greek for in the skull), is the control center of the central nervous system, responsible for behavior. ...


Soft tissue anatomy

In the middle line below the chin can be felt the body of the hyoid bone, just below which is the prominence of the thyroid cartilage called "Adam's apple," better marked in men than in women. Still lower the cricoid cartilage is easily felt, while between this and the suprasternal notch the trachea and isthmus of the thyroid gland may be made out. At the side the outline of the sternomastoid muscle is the most striking mark; it divides the anterior triangle of the neck from the posterior. The upper part of the former contains the submaxillary gland also known as the parotid glands, which lies just below the posterior half of the body of the jaw. The line of the common and the external carotid arteries may be marked by joining the sterno-clavicular articulation to the angle of the jaw. This article is about the part of the face. ... The hyoid bone (Os Hyoideum; Lingual Bone) is a bone in the human neck, not articulated to any other bone; it is supported by the muscles of the neck and in turn supports the root of the tongue. ... The cartilages of the larynx. ... For other uses, see Adams apple (disambiguation). ... The cricoid cartilage, or simply cricoid, is the only complete ring of cartilage around the trachea. ... This article needs to be cleaned up to conform to a higher standard of quality. ... Windpipe redirects here. ... The thyroid gland and its relations In anatomy, the thyroid (IPA θaɪɹoɪd) is an endocrine gland. ... In human anatomy, the sternocleidomastoid (pronounced ) muscles are muscles in the neck that act to flex and rotate the head. ... The submandibular gland (or submaxillary gland in older references) is one of the salivary glands, responsible for producing saliva. ... Human jaw front view Human jaw left view Human jaw top view The jaw is either of the two opposable structures forming, or near the entrance to, the mouth. ... Left Common Carotid Artery- One of three arteries that originate along the aortic arch. ... Arteries of the neck - right side. ...


The eleventh or spinal accessory nerve corresponds to a line drawn from a point midway between the angle of the jaw and the mastoid process to the middle of the posterior border of the sterno-mastoid muscle and thence across the posterior triangle to the deep surface of the trapezius. The external jugular vein can usually be seen through the skin; it runs in a line drawn from the angle of the jaw to the middle of the clavicle, and close to it are some small lymphatic glands. The anterior jugular vein is smaller, and runs down about half an inch from the middle line of the neck. 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. The accessory nerve is the eleventh of twelve cranial nerves. ... Trapezius In human anatomy, the trapezius is a large superficial muscle on a persons back. ... The jugular veins are veins that bring deoxygenated blood from the head back to the heart via the superior vena cava. ... Collarbone and collar bone redirect here. ... The anterior jugular vein begins near the hyoid bone by the confluence of several superficial veins from the submaxillary region. ... Collarbone and collar bone redirect here. ... This article is about the human skeletal muscle. ...


Neck pain

Disorders of the neck are a common source of pain. The neck has a great deal of functionality but is also subject to a lot of stress. Common sources of neck pain (and related pain syndromes, such as pain that radiates down the arm) include:

Whiplash is the common name for a hyper extension/flexion injury to the cervical, thoracic or lumbar spines. ... A spinal disc herniation, incorrectly called a slipped disc, is a medical condition affecting the spine, in which a tear in the outer, fibrous ring (annulus fibrosus) of an intervertebral disc allows the soft, central portion (nucleus pulposus) to bulge out. ... This article does not cite any references or sources. ... Osteoarthritis / Osteoarthrosis (OA, also known as degenerative arthritis, degenerative joint disease, arthrosis or in more colloquial terms wear and tear), is a condition in which low-grade inflammation results in pain in the joints, caused by wearing of the cartilage that covers and acts as a cushion inside joints. ... Section of an artery For other uses, see Artery (disambiguation). ... The internal jugular vein collects the blood from the brain, from the superficial parts of the face, and from the neck. ... A venous thrombosis is a blood clot that forms within a vein. ...

See also

The anterior triangle is bounded, in front, by the middle line of the neck; behind, by the anterior margin of the Sternocleidomastoideus; its base, directed upward, is formed by the lower border of the body of the mandible, and a line extending from the angle of the mandible to the... The posterior triangle (or lateral cervical region) is bounded, in front, by the Sternocleidomastoideus; behind, by the anterior margin of the Trapezius; its base is formed by the middle third of the clavicle; its apex, by the occipital bone. ... For other uses, see Throat (disambiguation). ... Human heart and lungs, from an older edition of Grays Anatomy. ... Hanging is the suspension of a person by a ligature, usually a cord wrapped around the neck, causing death. ... Torticollis, or wry neck, is a condition in which the head is tilted toward one side, and the chin is elevated and turned toward the opposite side. ... A diagram of a thoracic vertebra. ... The Spinal cord nested in the vertebral column. ... Chronic pain was originally defined as pain that has lasted 6 months or longer. ... Look up nape in Wiktionary, the free dictionary. ...

External links

Look up Neck in
Wiktionary, the free dictionary.
  • American Head and Neck Society
  • The Anatomy Wiz. An Interactive Cross-Sectional Anatomy Atlas

  Results from FactBites:
 
Neck Pain (1249 words)
The neck (cervical spine) is composed of vertebrae which begin in the upper torso and end at the base of the skull.
Neck pain may result from abnormalities in the soft tissues - the muscles, ligaments, and nerves - as well as in bones and joints of the spine.
When neck pain persists or is chronic, your orthopaedist may recommend a rehabilitation program that includes an exercise program and various types of physical therapy to help you relieve your pain and prevent it from coming back.
Northern Neck Tourism Council - Your Chesapeake Bay Country Getaway on Virginia's Northern Neck (489 words)
Northern Neck Spotlight: Virginia's Northern Neck is featured article in September 2007 issue of Dreamscapes, a Canadian Travel and Lifestyle magazine.
The Northern Neck is also home to Stratford Hall, the birthplace of Robert E. Lee, and Menokin, home of Francis Lightfoot Lee(signer of the Declaration of Independence).
The Northern Neck Tourism Council is a nonprofit organization dedicated to the promotion of tourism in Virginia's Northern Neck.
  More results at FactBites »

 
 

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