Kinesiology - Shoulder Complex

Action of Trapezius 1

elevate scapula, extend head and cervical spine

Action of Trapezius 2

upward rotation, retraction, elevation

Action of Trapezius 3

retraction, upward and downward rotation

Action of Trapezius 4

depression, retraction, upward rotation

Action of the Rhomboids

retract scapula, elevate scapula, downward rotate scapula

Action of the Levater Scapulae

elevates scapula

Origin of the Serratus Anterior

1st-8th rib

Insertion of the Serratus Anterior

superior angle, medial border, inferior angle of scapula

Action of the Serratus Anterior

protraction of scapula

Inervation of the Serratus Anterior

long thoracic (c5-c7)

Origin of the Pectoralis Minor

3rd-5th ribs

Insertion of the Pectoralis Minor

coracoid process

Action of the Pectoralis Minor

stabilization, depression, downward rotation, forward tipping of the scapula, accessory to inspiration

Innervation of the Pectoralis Minor

medial pectoral nerve

origin of the supraspinatus

supraspinatus fossa of the scapula

insertion of the supraspinatus

greater tubercle of the humerus

action of the supraspinatus

abduction, external rotation

innervation of the supraspinatus

suprascapular

origin of infraspinatus

infraspinatus fossa of scapula

insertion of the infraspinatus

greater tubercle of humerus

action of infraspinatus

external rotation, horizontal abduction

innervation of infraspinatus

subscapular nerve

origin of teres minor

posterior lateral border of scapula

insertion of teres minor

greater tubercle of the humerus

action of teres minor

external rotation, horizontal abduction

innervation of teres minor

axillary nerve

origin of subscapularis

subscapular fossa of scapula (ant.)

insertion of subscapularis

lesser tubercle of humerus

action of subscapularis

medial rotation

innervation of subscapularis

subscapular nerve

origin of anterior deltoid

outer 1/3 clavicle, top acromion scapular spine

insertion of anterior deltoid

deltoid tuberosity of the humerus

action of anterior deltoid

flexion, horizontal adduction, medial rotation

innervation of the anterior deltoid

axillary nerve

origin of middle deltoid

outer 1/3 clavicle, top of acromion scapular spine

insertion of middle deltoid

deltoid tuberosity of the humerus

action of middle deltoid

abduction, horizontal abduction

innervation of middle deltoid

axillary nerve

origin of posterior deltoid

outer 1/3 clavicle, top of acromion scapular spine

insertion of posterior deltoid

deltoid tuberosity of the humerus

action of posterior deltoid

extension, horizontal abduction, external rotation

innervation of posterior deltoid

axillary nerve

origin of coracobrachialis

coracoid process of the scapula

insertion of coracobrachialis

medial anterior humerus

action of the coracobrachialis

flexion, adduction, horizontal adduction

innervation of the coracobrachialis

musculotaneous nerve

origin of Teres major

lower 1/3 of posterior lateral border (scapula)

insertion of Teres major

anterior humerus

action of teres major

extension, adduction, medial rotation

innervation of teres major

subscapular nerve

Origin of the Biceps brachii long head

supraglenoid tubercle

origin of biceps brachii short head

coracoid process

insertion of bicep brachii

radial tuberosity

action of biceps brachii

abduction (long), flexion, adduction, medial rotation, horizontal adduction (short)

innervation of biceps brachii

musculocuntaneous

origin of triceps brachii

insertion of triceps brachii

post. olecranon process of the ulna

action of triceps brachii

extension, adduction

innervation of triceps brachii

radial nerve