Neck, in land vertebrates, the portion of the body joining the head to the shoulders and chest. Poor body positioning creates tension in your back, shoulders, and neck. 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. The spinal column contains about two dozen inter-connected, oddly shaped, bony segments, called vertebrae. This article describes the anatomy of the head and neck of the human body, including the brain, bones, muscles, blood vessels, nerves, glands, nose, mouth, teeth, tongue, and throat. Cancers of the brain, the eye, the esophagus, and the thyroid gland, as well as those of the scalp, skin, muscles, and bones of the head and neck, are not usually classified as head and neck cancers.. Some important structures contained in or passing through the neck include the seven cervical vertebrae and enclosed spinal cord, the jugular veins and carotid arteries, part of the esophagus, the larynx The neck is the start of the spinal column and spinal cord. And that tension may cause a headache. Sometimes, cancerous squamous cells can be found in the lymph nodes of the upper neck when there is no evidence of cancer in other parts of the head and neck (). 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. Poor posture can also cause pain in the back of your head and neck.

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