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The Rear naked choke (RNC) is a chokehold in martial arts applied from an opponent's back. Depending on the context, the term may refer to one of two variations of the technique; either arm can be used to apply the choke in both cases. The term ''rear naked choke'' likely originated from the technique in Jujutsu and Judo known as the "''Hadaka Jime''", or "Naked Strangle". The word "naked" in this context suggests that, unlike other strangulation techniques found in Jujutsu/Judo, this hold does not require the use of a keikogi ("gi") or training uniform. The choke has two variations:〔(Judosport.net )〕 in one version, the attacker's arm encircles the opponent's neck and then grabs his own biceps on the other arm (see below for details); in the second version, the attacker clasps his hands together instead after encircling the opponent's neck. == "Figure four" variation == This variant is considered to be a "''blood choke''" because it restricts blood flow to the brain via the carotid arteries. When done correctly, it can cause temporary unconsciousness in a few seconds. The following is a description of this technique using the left arm. #The attacker's left arm encircles the opponent's neck, with the opponent's trachea at the crook of the elbow. #The attacker's left hand then grasps his own upper right arm (). #The right hand is placed behind (or occasionally on top of) the opponent's head. A more effective form of the choke can be applied by placing the palm of the right hand against the attackers own shoulder rather than behind the opponents head. This greatly reduces the escape possibilities. #The elbows are then brought together such that lateral pressure, from the biceps and radius bone, is applied to the neck on both sides. When applied properly unconsciousness occurs in less than 10 seconds and recovery from the choke is just as quick. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「rear naked choke」の詳細全文を読む スポンサード リンク
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