The position of the bent arm is the elbow. I hit my elbow when I kicked the corner of the table. This novel describes the social problems of a city and touches on the contradictions and conflicts within the city through the elbow. Elbow is the joint between human upper arm and forearm, and it is also a common body part. The elbow joint consists of the connection between the upper arm bone (humerus) and the forearm bone (ulna and radius). It has the function of bending and straightening, which enables us to carry out various arm movements.
The elbow joint is a complex joint, which consists of three bones and several joints and ligaments to maintain stability. For example, there is a spherical joint between the forearm bone of humerus and the forearm bone of radius and ulna, which allows us to rotate our arms in a straight and curved state. The elbow joint is also the starting point of many important movements, such as grasping, pushing and pulling, and rotating. Because of the importance of elbow joint, it is very important to maintain the stability and health of elbow joint.
In sports or daily activities, we should avoid excessive use of elbow joint or making incorrect movements to reduce the occurrence of elbow joint problems. When we talk about the extension of the elbow joint, we usually mean the straight action of the elbow joint. Straightening the elbow joint is an important action, which allows us to extend the folded or bent arm to an upright position. The expansion of elbow joint is accomplished through the coordination of muscles and ligaments. The muscles involved in elbow extension are biceps brachii, triceps brachii and extensor carpi radialis.
The expansion of elbow joint is very important for daily activities and many sports. For example, when we stand up from a sitting position, the expansion of the elbow joint enables us to push the body upward. In weightlifting training, the elbow extension enables us to lift heavy objects, such as barbells or dumbbells. However, excessive use or incorrect elbow expansion may lead to elbow problems, such as elbow arthritis, elbow contusion or elbow dislocation.
Importance of elbow joint
Function: The elbow joint enables us to bend and extend the upper limb, and also allows us to rotate and move the arm sideways to some extent. This flexibility enables us to carry out various daily activities, such as grasping objects, lifting heavy objects, pushing or pulling objects.
Starting point: Many upper limb movements start from the elbow joint. For example, when we lift an arm or an object, the elbow provides strength and stability, making the action more effective and accurate.