5 Questions
Which muscle connects the upper limb to the thoracic wall and vertebral column?
Trapezius
Which nerve supplies the Trapezius muscle?
Spinal part of accessory nerve
Which muscle raises the medial border of the scapula?
Levator scapulae
Which muscle abducts the arm and extends it laterally?
Deltoid
What is the action of the Latissimus dorsi muscle?
Extends, adducts, and medially rotates the arm
Study Notes
Muscles of the Upper Limb
- The Trapezius muscle connects the upper limb to the thoracic wall and vertebral column.
- The spinal accessory nerve (cranial nerve XI) supplies the Trapezius muscle.
- The Levator scapulae muscle raises the medial border of the scapula.
- The Deltoid muscle abducts the arm and extends it laterally.
- The Latissimus dorsi muscle adducts the arm, extends it, and internally rotates the shoulder joint.
Test your knowledge of the muscles connecting the upper limb to the thoracic wall and vertebral column, as well as the muscles connecting the scapula to the humerus. Identify the nerve origin, insertion, and supply of the trapezius muscle and other relevant details.
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