Like many martial artists, I have an interest in pressure points. There are some problems, however, with targeting pressure points during a fight. Pressure points are best activated at very specific angles. For instance, some pressure points are only activated when the force applied to them enters at a 45 degree. Not to mention how small pressure points tend to be. If you are just a couple centimeters off target, the pressure point is not suitably affected. Further more, pressure points do not react the same to the same stimuli. Some are best activated through direct continuous pressure—being pressed; others are activated through a pulse—being hit; and others are activated through friction—being rubbed. These variables make pressure point attacks quite difficult.
For this reason I like to target pressure points that are easy to access; in other words, the target area is relatively big. Therefore, I like to target plexuses. A “plexus” is a cluster of intersecting nerves; in other words, a group of nerves (pressure points) that come together in a type of nerve knot.
Probably the most famous plexus for martial artists is the solar plexus, better known in academic circles as the
celiac plexus. The solar plexus is situated vertically, a little below the bottom of the sternum (xyphoid process), but embedded deep into the trunk. In Taekwon-Do it is generally reached with a penetrating punch, rear elbow thrust, turning kick or side-piercing kick. Because the solar plexus contain nerves that link to most of the internal organs, trauma to this plexus can shock a person's whole system. However, the celiac plexus is seated deeper into the torso than most people imagine, so actually striking the “solar plexus” is not that easy. The adverse affects achieved by attacking the “solar plexus” are most likely a result of other vulnerable targets in the same area, for instance the highly fragile xyphoid process, which is a cartridge bone that breaks quite easily; the diaphragm that goes numb when struck and makes it difficult to breath—being “winded”; the stomach, which, when full, can cause nausea when hit; and so on. Some people, especially large (i.e. overweight) people, may not be adversely affected when the “solar plexus” is targeted, purely because of the layer of protective blubber. While the celiac plexus is in theory a great target, it is not always as easy to reach.
One of the plexus that I believe is the easiest to access is the
brachial plexus, a group of nerves that runs from the spine through the side-front of the neck, disappears under the clavicle (collarbone) into the axilla (armpit) and then disperse into the arm. What I like about this plexus is that a good amount of trauma will severely affect the whole arm because the brachial plexus contains the arm's major nerves: ulna nerve, radial nerve and medial nerve. Other nerves, like some of the pectoral nerves and scapular nerves, also make up part of the brachial plexus. The place to reach it is just above the clavicle (collarbone) on the side-front of the neck. The nerves lie relatively shallow, so they are easy to strike. An efficient attack for this target is the inward knife-hand strike travelling at a somewhat downward angle, like the inward knife-hand strike in movement #2 in the pattern Won-Hyo. You can also use a side-fist strike to hammer into this target. A less easy place to target the brachial plexus, but one that is also highly effective, is in the armpit. Were your attacker swinging towards you with a hay maker punch, you could possibly duck-and-weave, while striking the armpit with your first, preferably a middle-knuckle fist for most penetration. Breaking the clavicle will also affect the brachial plexus. Trauma to the brachial plexus results in severe pain and possible (temporary) loss of motor control of much of the arm or even complete (temporary) paralysis of the arm.
In close proximity of the brachial plexus is the
cervical plexus, which is also relatively easy to access. The “superficial cervical plexus” is located vertically in line with the Angle of Mandible (the point behind the earlobe), down towards the middle of the neck. Because this plexus have nerves going up into the skull, trauma to it causes an unnerving affect on the side of the face and head. It can also lead to possible unconsciousness. An easy attack to the cervical plexus is a knife-hand or side-fist strike. Turning kicks (aka roundhouse kicks) to the plexus have also caused many a knock-out in Taekwon-Do, Muay Thai boxing, MMA and similar tournaments. (Honestly, I'm not sure if the knock-outs we most often see with kicks to this plexus is truly because of trauma to the cervical plexus itself, or merely because of the trauma caused to the head, i.e. brain, in general.) It is an easily accessible plexus and is not necessarily that dangerous if activated with care by a professional; however, it's close proximity to the brain makes this a dangerous vital spot to target, especially with kicks which are less precise, so only train it under the instruction of a professional instructor.
In summary, plexuses are clusters of nerves. Unlike a single pressure point that requires very precise activation, a plexus is bigger and therefore easier to activate. The solar plexus is probably the most famous plexus in the martial arts, but it is actually quite difficult to reach as it is embedded deep into the torso. Much more attainable plexuses are the brachial plexus and the cervical plexus, both situated in the neck area. When training to attack these targets make sure to do so under the supervision of a professional.
