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A headache, also known as cephalalgia, is the symptom of pain in the face, head, or neck.It can occur as a migraine, tension-type headache, or cluster headache. [1] [2] There is an increased risk of depression in those with severe headaches.
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.
An adult's trachea has an inner diameter of about 1.5 to 2 centimetres (1 ⁄ 2 to 3 ⁄ 4 in) and a length of about 10 to 11 cm (4 to 4 + 1 ⁄ 4 in), wider in males than females. [2]
Neck pain, also known as cervicalgia, is a common problem, with two-thirds of the population having neck pain at some point in their lives. [1]Since there is not a universally accepted classification for neck pain, it is difficult to study the different neck pain types.
In vertebrates, the circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the body. [1] [2] It includes the cardiovascular system, or vascular system, that consists of the heart and blood vessels (from Greek kardia meaning heart, and Latin vascula meaning vessels).
Li Kening (Chinese: 李克寧) (died March 25, 908 [1] [2]) was a younger brother of the late Chinese Tang dynasty warlord Li Keyong, the Prince of Jin.After Li Keyong's death, Li Kening initially served as a key advisor to Li Keyong's son and successor Li Cunxu (the future Emperor Zhuangzong of Later Tang), but soon was persuaded by his wife Lady Meng to try to take over from Li Cunxu.
Yang Kening (Chinese: 杨克宁; born January 1962) is a former Chinese politician of Tibetan ethnicity who spent his entire career in southwest China's Sichuan province. He was investigated by China's top anti-graft agency in November 2023. [ 1 ]