Muscles that Move the Pectoral Girdle and Scapula, Muscles that move GH joint and arm

Trapezius Actions

superior fibers: elevate and superiorly rotate scapula

middle fibers: retract scapula

inferior fibers: depress scapula

Trapezius origin

occipital bone and spinous processes of cervical and thoracic vertebrae

Trapezius insertion

clavicle, acromion, spine of scapula

Trapezius innervation

accessory nerve

Levator Scapulae actions

elevates and inferiorly rotates scapula

Levator Scapulae Origin

Upper cervicle transverse process

Levator Scapulae Insertion

superior and medial border of scapula

Levator Scapulae innervation

dorsal scapular nerve

Rhomboid Major actions

elevate, retract and inferiorly rotate scapula

Rhomboid Major Origin

spinous processes of T2-T5

Rhomboid Major Insertion

Medial border of scapula

Rhomboid Major Innervation

Dorsal Scapular nerve

Rhomboid Minor Actions

elevate, retract, and inferiorly rotate scapula

Rhomboid Minor Origin

spinous processes of C7-T1

Rhomboid Minor Insertion

Superior Middle Border of Scapula

Rhomboid Minor Innervation

Dorsal scapular nerve

Pectoralis Minor actions

protracts and depresses scapula

Pectoralis Minor origin

ribs 3-5

Pectoralis Minor Insertion

coracoid process of scapula

Pectoralis Minor Innervation

Medial Pectoral nerve

Serratus Anterior actions

protraction, upward rotation

serratus anterior origin

ribs 1-8

serratus anterior insertion

anterior medial border of scapula

serratus anterior innervation

long thoracic nerve

Subclavius actions

stabilizes and depresses clavicle

subclavius origin

rib 1

Subclavius insertion

inferior surface of clavicle

subclavius innervation

nerve to subclavius

Latissiumus Dorsi actions

Extends, adducts and medially rotates GH

Latissimus Dorsi Origin

spine, lower ribs, iliac crest

Latissimus Dorsi Insertion

intertubercular groove of humerus

Latissimus Dorsi Innervation

thoracodorsal nerve

Pectoralis Major Actions

arm flexion; adducts and medially rotates GH joint

Pectoralis Major Origin

medial clavicle, ribs, body of sternum

Pectoralis Major insertion

intertubercular groove of humerus

Pectoralis major innervation

lateral and medial pectoral nerve

Deltoid Actions

Anterior: Flexion and internal rotation

Middle: Gh Abduction

Posterior: Extension and external rotation

Deltoid Origin

acromion end of the clavicle, scapula

Deltoid Insertion

deltoid tuberosity of humerus

Deltoid Innervation

axillary nerve

Coracobrachialis actions

adducts and flexes GH joint

Coracobrachialis origin

coracoid process of scapula

coracobrachialis insertion

middle medial shaft of humerus

Coracobrachialis innervation

Musculocutaneous nerve

Teres Major actions

extends, adducts and medially rotates GH joint

Teres Major origin

inferior lateral border and angle of scapula

Teres Major insertion

lesser tubercle and intertubercular groove of humerus

Teres Major innervation

lower subscapular nerve

Triceps Brachii Actions

extends GH joint

Triceps brachii origin

infraglenoid tubercle of scapula

Triceps brachii insertion

olecranon process of ulna

Triceps brachii innervation

radial nerve

Biceps brachii actions

flexes GH joint

Biceps brachii origin

supraglenoid tubercle

Biceps brachii insertion

radial tuberosity and bicipital aponeurosis

Biceps Brachii Innervation

musculocutaneous nerve

Subscapularis actions

medially rotates GH

Subscapularis origin

subscapular fossa

subscapularis insertion

lesser tubercle of humerus

Subscapularis innervation

upper and lower subscapular nerves

supraspinatus actions

abducts GH and stabilized GH

Supraspinatus origin

supraspinous fossa

supraspinatus insertion

greater tubercle of humerus

Infraspinatus actions

adducts and laterally rotates GH joint

Infraspinatus origin

infraspinous fossa of scapula

Infraspinatus insertion

greater tubercle of humerus

infraspinatus innervation

suprascapular nerve

Teres Minor actions

adducts and laterally rotates GH joint, stabilizes GH joint

Teres minor origin

superior lateral border of scapula

Teres Minor insertion

greater tubercle of humerus

teres minor innervation

axillary nerve