Origin: First rib

Insertion: Clavicle

Action: Depresses and protracts scapula

Innervation: Subscapular Nerve

Origin: Transverse process of the first 4 cervical vertabrae

Insertion: Vertebral border of scapula

Action: Elevates scapula

Innervation: Cervical Nerves and Dorsal Scapular Nerves

Origin: Spinous processes of upper thoracic vertebrae

Insertion: Vertebral border of scapula

Action: Adducts and downward rotates scapula

Innervation: Dorsal Scapular Nerve

Origin: Anterior, superior margins of ribs 1-9

Insertion: ANterior surface of scapula, vertebral border

Action: Protracts and upward rotates scapula

Innervation:Long Thoracic Nerve

Origin: Occipital bone, ligamentum nuchae, and spinous processes of thoracic vertebrae

Insertion: Clavical and scapula

Action: Head 1+2:Elevates

Head 2: Upward rotates

Head 3: Adducts

Head 4: Depresses

Innervation:Accesory Nerve and Cervical spinal nerves

Origin: Short head: coracoid process of scapula

Long head: supraglenoid tubercle of scapula

Insertion: Tuberosity of radius

Action: Flexes elbow and supinates forearm; flexes humerus

Innervation:Musculotaneous Nerve

Origin: ANterior distal humerus

Insertion: Tuberosity of ulna

Action: Flexes elbow

Innervation: Musculotaneous Nerve and Radial Nerve

Origin: Lateral epicondyle of humerus

Insertion: Styloid process of radius

Action: Flexes elbow

Innervation:Radial Nerve

Origin: Lateral epicondyle of humerus

Insertion: Olecranon on ulna

Action: Extends elbow

Innervation:Radial Nerve

Origin: Lateral head: superior lateral humerus

Medial head: posterior humerus

Long head: infraglenoid tubercle of scapula

Insertion: Olecranon process of ulna

Action: Extends eblow

Innervation:Radial Nerve

Origin: Spinous processes of C7-T1 vertebrae

Insertion: Vertebral border of scapula

Action: Adducts and downward rotates scapula

Innervation: Dorsal scapular nerve