Tori: Robert L. Connolly
Uke: Daniel Orkwis
One of the fundamental techniques in Budoshin is Tekubi Shimi Waza (page 164). This is sometimes called a “goose-neck” hold, which is a description of the Uke’s arm when the hold is set. While complete in itself, it is also used as a submit to complete other techniques. The Tori can get set this hold in a number of ways, but the Uki’s arm will always be in the same basic position. Much like a drawing of an Egyptian dancer, both the Uke’s elbow and wrist are bent. Once bent, the technique is set by twisting the hand towards the little finger. This movement is similar to turning the handle to open a casement window.
With the elbow bent, the effect is to over-pronate the forearm, causing the ulna and radius bones to cross. Usually the Uki will feel the pain in their wrist, though sometimes in the forearm itself. Further pressure will either dislocate the wrist (tearing several of the many ligaments that connect the hand to the arm), fracture the radius, the ulna, or both (more likely the radius), or dislocate the elbow (tearing the radial collateral ligament and possibly the annular ligament). Any of these will effectively disable the use of the hand. Only the broken bone will heal (relatively) quickly. Even with a broken bone (ulna or radius), it is likely that the range of pronation will be permanently limited.
Muscle resistance to this hold comes primarily from two muscles that rotate
the radius: biceps brachii and supinator. Only one of these
muscles (biceps brachii) has any significant mass. However, because
both of these muscles must rotate the radius directly (without any leverage),
the Tori, using the hand as a lever, has a significant torque advantage and
will usually be able to overcome any resistance from these muscles.