Sports Injuries

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Sports Injuries


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Platelet

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Platelet Platelets, also called thrombocytes (thromb- + -cyte, "blood clot cell"), are a component of blood whose function (along with the coagulation factors) is to stop bleeding by clumping and clotting blood vessel injuries. Platelets have no cell nucleus: they are fragments of cytoplasm that are derived from the megakaryocytes of the bone marrow, and then enter the circulation. These unactivated platelets are biconvex discoid (lens-shaped) structures, 2–3 µm in greatest diameter. Platelets are found only in mammals, whereas in other animals (e.g. birds, amphibians) thrombocytes circulate as intact mononuclear cells. The ligands, denoted by letter L, signal for platelets (P) to migrate towards the wound (Site A). As more platelets gather around the opening, they produce more ligands to amplify the response. The platelets congregate around the wound in order to create a cap to stop blood flow out of the tissue. On a stained blood smear, platelets appear as dark pur...
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Anxiety and panic attacks

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Explains anxiety and panic attacks, including possible causes and how you can access treatment and support. Includes tips for helping yourself, and guidance for friends and family. About anxiety What is anxiety? Anxiety is what we feel when we are worried, tense or afraid – particularly about things that are about to happen, or which we think could happen in the future. Anxiety is a natural human response when we perceive that we are under threat. It can be experienced through our thoughts, feelings and physical sensations. For me, anxiety feels as if everyone in the world is waiting for me to trip up, so that they can laugh at me. It makes me feel nervous and unsure whether the next step I take is the best way forward. Most people feel anxious at times. It's particularly common to experience some anxiety while coping with stressful events or changes, especially if they could have a big impact on your life.  What is the 'fight, flight or freeze' resp...
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Fifth disease

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Fifth disease  is a mild rash illness caused by parvovirus B19. It is more common in children than adults. ... This  disease , also called erythema infectiosum, got its name because it was fifth  in a list of historical classifications of common skin rash illnesses in children. Erythema infectiosum or fifth disease is one of several possible manifestations of infection by parvovirus B19. The name "fifth disease" comes from its place on the standard list of rash-causing childhood diseases, which also includes measles (1st), scarlet fever (2nd), rubella (3rd), Dukes' disease (4th, however is no longer widely accepted as distinct) and roseola (6th). Signs and symptoms Fifth disease starts with a low-grade fever, headache, rash, and cold-like symptoms, such as a runny or stuffy nose. These symptoms pass, then a few days later the rash appears. The bright red rash most commonly appears in the face, particularly the cheeks. This is a defining symptom of the infecti...
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