Muscle List Study: Axial Muscles Part #2

Know the location, name, action, origin, and insertion of alll these muscles.

What is the green highlighted muscle?

Sternocleidomastoid muscle flexes the neck forward and rotates the head toward the shoulder on the opposite side. The origin is the manubrium of the sternum and the medial portion of the clavicle. The insertion is the mastoid process of the temporal bone.

What is the green highlighted muscle?

Pectoralis major muscle is the prime mover of arm flexion; adducts & medially rotates arm. The origin is the clavicle, sternum, and ribs 1 through 6. The insertion is the intertubercular sulcus of the humerus.

What’s the green highlighted muscle?

Deltoid muscle is the prime mover of arm abduction. The origin is the lateral clavicle, and the acromion process and spine of scapula. The insertion is the deltoid tuberosity of the humerus.

What is the blue highlighted muscle?

Teres minor muscle laterally rotates the humerus. The origin is the posterior scapula (or the lateral border), while the insertion is the greater tubercle of the humerus.

What is the pink highlighted muscle?

Teres major muscle extends, medially rotates, and adducts the humerus. The origin is the inferior angle of the scapula (or the posterior surface), while the insertion is the intertubercular sulcus of the humerus.

What is the green highlighted muscle?

Temporalis muscle closes the jaw, with the origin at the temporal fossa and the insertion at the coronoid process of the mandible.

What’s the green highlighted muscle?

Pectoralis minor muscle along with the ribs, draws scapula forward and inferiorly. The origin is the third to fifth ribs, with the insertion being the coracoid process of the scapula.

What are the green highlighted muscles?

Trapezius muscle raises, rotates, and retracts (or adducts), the scapula and stabilizes it. The origin is the occipital cranial bone, the spinous process of C7, and all thoracic vertebrae. The insertion is the lateral clavicle, acromion process and spine of scapula.

What is the green highlighted muscle?

Latissimus dorsi muscle is the prime mover of arm extension, it adducts and medially rotates arm. The origin is the spinous processes of T7 through T12, the lumbar vertebrae, and iliac crest. The insertion is the intertubercular sulcus of the humerus.