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In martial arts, a knifehand strike is a strike using the part of the hand opposite the thumb (from the little finger to the wrist), familiar to many people as a karate chop (in Japanese, ''shutō-uchi''). This refers to strikes performed with the side of the knuckle of the small finger. Suitable targets for the knifehand strike include the mastoid muscles of the neck, the jugular, the throat, the collar bones, ribs, sides of the head, temple, jaw, the third vertebra (key stone of the spinal column), the upper arm, the wrist (knifehand block), the elbow (outside knifehand block), and the knee cap (leg throw). In many Japanese, Korean and Chinese martial arts systems, the knifehand is used to block as well as to strike. ==Japanese martial arts== is a term from Japanese martial arts like aikido and Chinese-Okinawan martial arts like karate referring to a hand position that resembles that of the blade of a sword. This can be in a high, middle or low position but is usually extended outwards at about eye level (towards the carotid artery and nerve – a key strike point). During practice, ''uke'' and ''tori'' will often stand opposite each other with their respective tegatana touching each other. From this position, considered by some the ideal combative distance for two unarmed opponents, many balance-breaking, striking and throwing techniques can be applied. In karate, the handsword collarbone chop (''tegatana-sakotsu-uchi''), the handsword collarbone strike (''tegatana-sakotsu-uchikomi'') and the handsword face chop (''tegatana-ganmen-uchi'') all use this fundamental strike as a basis for attack. The knife hand strike can be used with both sides of the hand. Having the thumb tucked in, leaving the fore finger side of the hand free, allows that side of the hand to be used as a striking surface. This is called a ''inside knife hand'' where as the pinkie finger side is called ''outside knife hand''. 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「Knifehand strike」の詳細全文を読む スポンサード リンク
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