Dim Mak

The touch of death (or death-point striking) refers to any martial arts technique reputed to kill using seemingly less than lethal force targeted at specific areas of the body.
The concept known as dim mak (simplified Chinese: 点脉; traditional Chinese: 點脈; pinyin: diǎnmài; Jyutping: dim2 mak6; lit. ‘press artery’), alternatively diǎnxué (simplified Chinese: 点穴; traditional Chinese: 點穴) traces its history to traditional Chinese medicine acupuncture. Tales of its use are often found in the Wuxia genre of Chinese martial arts fiction. Dim mak is depicted as a secret body of knowledge with techniques that attack pressure points and meridians, said to incapacitate or sometimes cause immediate or even delayed death to an opponent. Little scientific or historical evidence exists for a martial arts “touch of death”, although it has been confirmed that trauma may cause disproportionately catastrophic consequences when applied to known pressure points under specific circumstances. Commotio cordis, for example, is an often lethal disruption of heart rhythm that occurs as a result of a blow to the area directly over the heart (the precordial region), at a critical time during the cycle of a heart beat causing cardiac arrest.
The concept known as vibrating palm originates with the Chinese martial arts Neijing (“internal”) energy techniques that deal with the qi energy and the type of force (jin) used. It is depicted as “a technique that is part psychic and part vibratory, this energy is then focused into a wave”.