Final Answer:
The motion of the ulnar joint surface in Humeroulnar Extension is posterior translation.
Step-by-step explanation:
During Humeroulnar Extension, which is the extension of the elbow joint, the ulna moves relative to the humerus. Specifically, the ulnar joint surface undergoes a posterior translation, meaning it moves towards the back or posterior side of the body. This motion is part of the normal biomechanics of elbow extension, allowing for the forearm to straighten.
The hin-ge joint formed by the humerus and ulna facilitates this movement, and the posterior translation of the ulna corresponds to the extension phase of the elbow. Understanding the specific joint motions is crucial in fields such as anatomy, kinesiology, and orthopedics for assessing and describing physiological movements.
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Complete Question
Motion of ulnar joint surface in Humeroulnar Extension is __________ .
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