limb girdle

The term "limb girdle" refers to the bony or cartilaginous structure that connects the limbs to the axial skeleton. In humans, there are two limb girdles: the pectoral girdle and the pelvic girdle.12

The pectoral girdle, also known as the shoulder girdle, is composed of the clavicle (collarbone) and the scapula (shoulder blade). It connects the arms to the upper part of the axial skeleton and provides structural support for the shoulder, allowing for a wide range of arm motion.31

The pelvic girdle, or hip girdle, connects the legs to the vertebral column via the sacroiliac joint. It is formed by the ilium, pubis, and ischium, which fuse in adulthood. The pelvic girdle supports the body's weight and plays a crucial role in locomotion. Unlike the pectoral girdle, the pelvic girdle has a more rigid connection to the axial skeleton, limiting its range of motion but providing greater stability.2