Orthopedics Exam 2 question and answers graded A+ 2023

Orthopedics Exam 2 question and answers graded A+ 2023 Proximal and distal radio-ulnar joints allow for ________________ and _________________ of the forearm. - correct answer Pronation Supination The proximal radio-ulnar joint had shared articular capsule with the __________. a. Elbow b. Wrist - correct answer A. Elbow List one activity that uses forearm pronation: List one activity that uses forearm supination: - correct answer Pronation: Typing Supination: Feeding Supination range of motion is limited by this soft tissue structure: a. Pronator Muscles b. Supinator Muscles c. Biceps Muscles d. Lateral Collateral Ligament of the elbow - correct answer a. Pronator Muscles During Pronation/Supination, the __________ bone rotates over a relatively fixed ______________ bone. - correct answer Radius Ulna The (lateral/Medial) compartment of the elbow shows increased wear over the other compartment due to all elbow and forearm motions involving the humeroradial joint. - correct answer Lateral Muscles that cross the elbow joint and have their distal attachment on the ulna (can/cannot) produce pronation or supination. - correct answer Cannot The biceps brachii flexes the elbow and (supinate/pronates) the forearm due to one of its head attaching to the medial side of the radius - correct answer Supinates Flexing the elbow with a neutral forearm causes the brachioradialis to have a "bowstring" effect, which has the effect of (increasing/decreasing) its moment arm. - correct answer Increasing In accordance with function demans. flexor torques, are (greater/less) than extensor torques. - correct answer Greater Flexion torques are greater with the forearm (pronated/supinated) - correct answer Supinated Polyarticular muscles cross ____________________ joints. - correct answer Multiple Explain why combining elbow flexion with shoulder extension is an effective way to produce biceps-generated elbow flexion torque. - correct answer Shoulder extensions reduces the net shortening of the biceps as it flexes the elbow by neutralizing the biceps shoulder flexion capabilities. This allows the same amount of flexion to occur in the same time, but at a slower contraction velocity. Therefore, a more forceful biceps contraction occurs.