kines muscles oia

Trapezius

O: occipital bone, spines of c7-thoracic vertebrae

I: acromion process, outer clavicle, spines of scaps

A: adducts and pulls upward on scapula

Serratus Anterior

O: lateral aspects of ribs 1-8

I: length of medial border of scapula

A: abduction, upwards rotation of scapula

Deltoid

O: clavicle, acromion process, spine of scapula

I: deltoid tuberosity

A: abduction

Pectoralis Major

O: clavicle, sternum, costal cartilage ribs 1-6

I: outer lip of intertubercular groove

A: extension, adduction, IR, horizontal adduction

Coracobrachialis

O: coracoid process

I: medial aspect of humerus

A: mirrors pec major; adduction, flexion, horizontal adduction

Latissimus Dorsi

O: spinous processes of lower 6 thoracic, lumbar vertebrae

I: medial aspect of intertubercular groove

A: extension, adduction, horizontal abduction

Teres Major

O: posterior surface of inferior angle of the scapula

I: crest of lesser tubercle

A: same as Lats; extension, adduction, horizontal abduction

Teres Minor and Infraspinatus

O: posterior surface of scapula below spine of lateral border

I: greater tubercle of humerus on posterior side

A: horizontal abduction, extension, ER

Supraspinatus

O: supraspinatus fossa

I: top of greater tubercle of humerus

A: first 15 degrees of abduction

Subscapularis

O: subscapular fossa

I: lesser tuberosity of humerus

A: IR, adduction of humerus

Levator Scapulae

O: transverse process of upper four cervical vertebrae

I: medial border of scapula above base of spine

A: elevates scapula

Rhomboids

O: spinous processes of last cervical vertebrae and first five thoracic

I: medial border of scapula, below the spine

A: adduction, downward rotation

Pectoralis Minor

O: outer surface of ribs 3-5

I: coracoid process

A: abduction, downward rotation of scapula

Biceps Brachii

O: long head- superior rim of glenoid fossa Short head- coracoid process of scapula

I: radial tuberosity

A: flexion, supination

Brachialis

O: anterior surface of lower half of humerus

I: ulnar tuberosity

A: true flexion of elbow

Brachioradialis

O: lateral supercondylar ridge

I: base of styloid process of radius

A: flexion of elbow

Pronator Teres

O: medial epicondyle, coronoid process of ulna

I: medial 1/3 of lateral radius

A: pronation

Pronator Quadratus

O: lower ¼ of anterior ulna

I: lower 1/3 of anterior radius

A: pronation

Triceps Brachii

O:

Long head- infraglenoid tubercle

Lateral head- upper 2/3 of posterior humerus

Medial head- lower ½ posterior humerus

I: olecranon process

A: extension of elbow, adduction of shoulder