Final answer:
Crossing arms involves shoulder and elbow joints movements, with shoulder support from muscles, tendons, and the glenoid labrum. The cerebellum coordinates movements like throwing and gait. A lateral knee blow can cause multiple ligament injuries.
Step-by-step explanation:
The Coordination of Movement and Support in the Human Body
Discussing the coordination of movement and support in the human body involves understanding the role of various joints and muscle groups. Crossing arms requires the movement of several joints including the shoulder and elbow joints. To cross your arms, you primarily use the shoulder joints to perform actions such as abduction and adduction, along with some rotation. Shoulder support is provided by multiple structures, including muscles, tendons, and the glenoid labrum.
The cerebellum plays a crucial role in coordinating movements, such as throwing a ball, which includes gait and posture control. It functions as a comparator to verify that motor commands match the intended movement. The coordination involves a complex interaction between the brain, nervous system, and musculoskeletal system, facilitated by the cerebrocerebellum.
Injury to the knee, such as from a blow to the lateral side while weight-bearing, can result in a sequence of injuries affecting the ligaments and potentially leading to dislocation and long-term knee instability.