axial muscles labeling

Sternocleimastoid muscle

Sternocleimastoid muscle

Longissimus

Illiocostalis

trapezius

levator scapulae

rhomboid major

rhomboid minor

latissimus dorsi

longissimus thoracis

Longissimus Cervicis

Iliocostalis thoracis

orbicularis oculi

orbicularis oris

buccinator

platysma

masseter

temporalis

trapezius

trapezius - origin

occipital bone and spinous processes of cervical and thoracic vertebrae

trapezius - insertion

scapula

trapezius - action

extends head and neck; rotates scapula

rhomboids

rhomboids - origin

spinous process of upper thoracic vertebrae

rhomboids - insertion

scapula

rhomboids - action

retracts scapula

levator scapulae

levator scapulae - origin

transverse process of C1-C4

levator scapulae - insertion

scapula

levator scapulae - action

elevates scapula

serratus anterior

serratus anterior - origin

ribs

serratus anterior - insertion

scapula

serratus anterior - action

upward rotation and protraction of the scapula

pectoralis major

pectoralis major - origin

clavicle & ribs

pectoralis major - insertion

humerus shaft

pectoralis major - action

flex, extend, and adduct arm

pectoralis minor

pectoralis minor - origin

3-5th rib

pectoralis minor - insertion

coracoid process of scapula

pectoralis minor - action

depresses scapula

teres major

teres major - origin

scapula

teres major - insertion

lesser tubercle of humerus

teres major - action

medially rotates arm

latissimus dorsi

latissimus dorsi - origin

spinous process of thoracic and lumbar vertebrae

latissimus dorsi - insertion

humerus shaft

latissimus dorsi - action

extend, medially rotate, and adduct arm

deltoid

deltoid - origin

clavicle, acromion process of scapula

deltoid - insertion

deltoid tuberosity

deltoid - action

abducts arm

supraspinatus

supraspinatus - origin

supraspinous fossa of scapula

supraspinatus - insertion

greater tubercle of humerus

supraspinatus - action

abducts arm - rotator cuff

infraspinatus

infraspinatus - origin

infraspinous fossa of scapula

infraspinatus - insertion

greater tubercle of humerus

infraspinatus - action

laterally rotates arm

teres minor

teres minor - origin

scapula

teres minor - insertion

greater tubercle of humerus

teres minor - action

laterally rotates arm

subscapularis

subscapularis - origin

subscapular fossa of scapula

subscapularis - insertion

lesser tubercle of humerus

subscapularis - action

medially rotates arm