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What is the function of the pectoral and pelvic girdles?
The pectoral girdle stabilizes the upper limbs on the thorax and allows a range of mobility at the shoulder. Malformations impair these functions and distort the appearance of the upper chest and back. The pelvic girdle transfers upper body weight to the lower limbs by articulating with the spine.
What is the main action of the muscles of the pectoral girdle?
The posterior muscles of the pectoral girdle work to elevate the shoulders, retract (pull together) the scapula, move the arm, and assist in pulling the head back. The major muscles in the pectoral girdle on the posterior side of the body are the rhomboid major & minor and the trapezius.
What is the main function of the musculoskeletal system?
Your musculoskeletal system includes bones, muscles, tendons, ligaments and soft tissues. They work together to support your body’s weight and help you move. Injuries, disease and aging can cause pain, stiffness and other problems with movement and function.
What is shoulder girdle and pelvic girdle?
The pectoral girdles are to the upper limbs as the pelvic girdle is to the lower limbs; the girdles are the parts of the appendicular skeleton that anchor the appendages to the axial skeleton.
What muscle is pectoral girdle?
Muscles that position the pectoral girdle are located either on the anterior thorax or on the posterior thorax (Figure 7.26). The anterior muscles include the subclavius, pectoralis minor, and serratus anterior. The posterior muscles include the trapezius, rhomboid major, and rhomboid minor.
Why is the pectoral girdle less sturdy than the pelvic girdle?
The pectoral girdle is weaker than the pelvic girdle because the pelvic girdle is the primary weight-bearing and locomotion structure for the body…
What do the pectoralis muscles do?
The pectoralis major extends across the upper part of the chest and is attached to a ridge at the rear of the humerus (the bone of the upper arm). Its major actions are adduction, or depression, of the arm (in opposition to the action of the deltoideus muscle) and rotation of the arm forward about the axis of the body.