A knockout (also referred to as a K. O. ) is a winning criterion in several full-contact combat sports, such as boxing, kickboxing, Muay Thai, mixed martial arts and others sports involving striking. Many Sports involve a degree of player-to-player and/or player-to-object contact A combat sport (also known as a combative sport) is a competitive Contact sport where two combatants fight against each other using certain rules of engagement typically Boxing (sometimes also known as English boxing or pugilism) is a Combat sport in which two participants generally of similar weight, Muay Thai ( IPA: /muɑɪtʰɑɪ/ muāitʰāi มวยไทย lit Mixed martial arts (MMA is a full contact Combat sport that allows a wide variety of fighting techniques from a mixture of Martial arts traditions and A strike is an attack with an inanimate object such as a Weapon, or with a part of the human body intended to cause an effect upon an opponent or to simply cause harm to A knockout is usually awarded when one participant is unable to rise from the canvas within a specified period of time, typically because of fatigue, injury (serious or temporarily incapacitating, e. Canvas is an extremely heavy-duty plain-woven fabric used for making Sails Tents Marquees Backpacks and other functions g. a bleeding cut above the eye can blind a fighter), loss of balance, or unconsciousness. See also Unconscious mind. Unconsciousness, more appropriately referred to as loss of Consciousness or lack of consciousness is A technical knockout (also referred to as a T. K. O. ) is often declared when the referee or other judges (such as official ring physician, the fighter himself, or the fighter's cornermen) decide that a fighter cannot continue the match, even though he did not fail the count. A physician, medical practitioner or medical doctor who practices Medicine, and is concerned with maintaining or restoring human Health Note For the basketball position see Cornerman (basketball A cornerman, or simply corner, is a Combat sports term for a coach  British records refer to TKOs as either "retired", if the fighter refuses to continue, or "R. The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom, the UK or Britain,is a Sovereign state located S. F. ", for Referee Stopped Fight.
There is actually very little known about what exactly causes a knockout but many agree it has to do with minor trauma to the brain stem. This usually happens when the head rotates sharply, often caused by a strike. A common misconception is that a knockout is caused by compression put on the carotid arteries in the neck restricting blood flow, but this is in fact how a choke out works.  A basic principle of boxing is to defend against this vulnerability by keeping both hands raised about the face.
A fighter who suffers a concussion and becomes unconscious from a strike with sufficient knockout power is referred to as having been knocked out or kayoed (KO'd). A strike is an attack with an inanimate object such as a Weapon, or with a part of the human body intended to cause an effect upon an opponent or to simply cause harm to Punching power is a term that describes the amount of Momentum in a person's punches. Losing balance without losing consciousness is referred to as being knocked down ("down but not out"). Repeated blows to the head are known to gradually cause permanent brain damage, with Alzheimer- or Parkinson's-like symptoms, and in severe cases may cause strokes or paralysis. Brain damage, or Acquired brain injury, is the destruction or degeneration of Brain cells. Alzheimer's disease ( AD) also called Alzheimer disease or simply Alzheimer's, is the most common form of Dementia. Dementia pugilistica ( DP) also called chronic traumatic encephalopathy ( CTE) chronic boxer’s encephalopathy, traumatic boxer’s encephalopathy A stroke is the rapidly developing loss of brain functions due to a disturbance in the blood vessels supplying blood to the brain Paralysed redirects here For other uses see xx Paralysed (disambiguation Paralysis is the complete loss of Muscle function This is commonly known as becoming "punch-drunk". Dementia pugilistica ( DP) also called chronic traumatic encephalopathy ( CTE) chronic boxer’s encephalopathy, traumatic boxer’s encephalopathy Because of this, many physicians advise against sports involving knockouts. A physician, medical practitioner or medical doctor who practices Medicine, and is concerned with maintaining or restoring human Health 
In boxing, a knockout occurs when a fighter is knocked down and does not get up within 10 seconds, as counted by the referee. Boxing (sometimes also known as English boxing or pugilism) is a Combat sport in which two participants generally of similar weight,