Elbow buckling is an unstable condition of the elbow joint that gives a feeling of 'giving way' or that the elbow has suddenly lost its stability. It is actually a protective response of the elbow and its surrounding tissues, to prevent further damage of the joint.
Elbow joint locking is more often seen in cases of injured elbow joints but certain bone and joint disorders may also contribute to it. It is caused by the movement of a muscle or tendon over a bony structure in the elbow. Excessive movement of the elbow or arm may occasionally cause the elbow to lock or buckle, potentially causing the elbow to turn out or in.
Buckling of elbow is characterized by a sensation of popping or locking of the elbow joint that makes it impossible to move and obvious to stop movement. It may also cause pain and weakness that interfere with activities like writing, cooking, changing clothes, moving arm etc.