Actions and Attachments: muscles of the head, neck, upper extremety, those that move the shoulder

A: frontalis

Elevates eyebrows; wrinkles skin on forehead horizontally

I: frontalis

Skin of eyebrows

O: frontalis

Epicranial aponeurosis

A: masseter

Elevates mandible and retracts mandible

I: masseter

ramus of mandible

O: masseter

Zygomatic arch

A: deltoid

Abducts the arm; secondarily flexes and extends arm

I: deltoid

Deltoid tuberosity of humerus

O: deltoid

Acromion and spine of scapula; lateral clavicle

A: latissimus dorsi

Adducts and extends the arm; rotates arm medially

I: latissimus dorsi

Floor of intertubercular sulcus of the humerus

O: latissimus dorsi

lliac crest, spinous processes of lower thoracic and all lumbar vertebrae

A: pectoralis major

Flexes and adducts the arm; rotates arm medially

I: pectoralis major

Greater tubercle and lateral lip of intertubercular sulcus of humerus

O: pectoralis major

Medial clavicle, sternum, costal cartilages 1-7

A: pectoralis minor

Protracts and depresses scapula

I: pectoralis minor

Coracoid process

O: pectoralis minor

Anterior part of ribs 3-5

A: rhomboid major

Retract scapula

I: rhomboid major

Medial border of scapula

O: rhomboid major

Spinous processes of T2-T5 (major)

A: rhomboid minor

Retract scapula

I: rhomboid minor

Medial border of scapula

O: rhomboid minor

Spinous processes of C7-T1 (minor)

A: serratus anterior

Prime mover of scapula in protraction; assists in superior rotation of scapula

I: serratus anterior

Medial border of scapula

O: serratus anterior

First nine ribs

A: teres major

Adducts, extends, and rotates arm medially

I: teres major

Medial lip of intertubercular sulcus of the humerus

O: teres major

Posterior, inferior portion of scapula

A: trapezius

Elevates scapula; rotates scapula superiorly; Retracts;depresses;
rotates scapula superiorly

I: trapezius

Lateral clavicle; Spine and acromion of scapula

O: trapezius

External occipital protuberance and cervical vertebrae; Spinous processes of thoracic vertebrae