horizontal abduction
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During the concentric phase of a reverse fly exercise, the shoulder joint primarily goes through horizontal abduction as the arms move outward away from the body. The scapulothoracic joint also engages to stabilize the shoulder blades and maintain proper alignment. This coordinated action involves the posterior deltoid and other muscles of the upper back to perform the movement efficiently and effectively.
No, a dislocation is when the bones at a joint are forced out of their normal position. A tearing of ligaments due to a twisting action is more likely to cause a sprain, which is damage to the ligaments that connect bones at a joint.
During supination, the elbow joint rotates outward, allowing the palm to face upward. During pronation, the elbow joint rotates inward, causing the palm to face downward.
The supraspinatus muscle is responsible for initiating abduction of the arm at the shoulder joint. It also helps stabilize the shoulder joint during arm movements.
During flexion, the shoulder joint allows the arm to move forward and upward, increasing the range of motion. During extension, the shoulder joint allows the arm to move backward and downward, decreasing the range of motion.
The main action of the flexor hallucis longus muscle is to flex the big toe and help in plantar flexion of the ankle joint. It also contributes to support the arch of the foot and assists in propulsion during walking and running.