Axioappendicular muscles

Axioappendicular Muscles are a group of muscles that connect the upper limb to the axial skeleton. They are divided into two groups: the muscles that connect the upper limb to the vertebral column (posterior axioappendicular muscles) and the muscles that connect the upper limb to the thoracic cage (anterior axioappendicular muscles).

Anatomy

The anterior axioappendicular muscles include the pectoralis major, pectoralis minor, subclavius, and serratus anterior. These muscles are primarily responsible for movements of the shoulder joint.

The posterior axioappendicular muscles include the trapezius, latissimus dorsi, levator scapulae, and the rhomboids. These muscles are primarily responsible for movements of the scapula.

Function

The axioappendicular muscles play a crucial role in the movement and stabilization of the upper limb. They allow for a wide range of motion, including flexion, extension, abduction, adduction, and rotation of the shoulder joint. They also help to stabilize the scapula against the thoracic wall, providing a solid base from which the arm can move.

Clinical Significance

Injury or disease affecting the axioappendicular muscles can lead to a range of clinical conditions. For example, damage to the brachial plexus, a network of nerves that innervates these muscles, can result in weakness or paralysis of the upper limb. Conditions such as winged scapula can also occur if the serratus anterior muscle is damaged.

See Also

• Muscular system
• Upper limb
• Shoulder joint
• Scapula