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The International Classification of Headache Disorders (ICHD) is a detailed hierarchical classification of all headache-related disorders published by the International Headache Society. [1]
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.
Migraine (UK: / ˈ m iː ɡ r eɪ n /, US: / ˈ m aɪ-/) [1] [2] is a genetically-influenced complex neurological disorder characterized by episodes of moderate-to-severe headache, most often unilateral and generally associated with nausea and light and sound sensitivity.
The blood–brain barrier (BBB) is a highly selective semipermeable border of endothelial cells that regulates the transfer of solutes and chemicals between the circulatory system and the central nervous system, thus protecting the brain from harmful or unwanted substances in the blood. [1]
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).
A woman keening at a wake in County Kerry in the early nineteenth century, depicted from the memories of Samuel Carter Hall.She had "black, uncombed locks" and a blue cloak, and held her hands above the body then dramatically waved them in the air "as if by sudden inspiration".
Knee pain is pain in or around the knee.. The knee joint consists of an articulation between four bones: the femur, tibia, fibula and patella.There are four compartments to the knee.
Chest pain is pain or discomfort in the chest, typically the front of the chest. [1] It may be described as sharp, dull, pressure, heaviness or squeezing. [3] Associated symptoms may include pain in the shoulder, arm, upper abdomen, or jaw, along with nausea, sweating, or shortness of breath.