INNER BODY MUSCLES

Assignment chart:

Muscle	Origin	Insertion	Movement
Deltoid	Anterior and Middle head	Deltoid tuberosity of the humerus	Flexes Arm at shoulder Medially rotates arms at shoulder Abducts arm at  shoulder
Intercostal muscles	Inferior border of rib insertion	Superior border of rib below	Elevates ands depresses ribs
Biceps brachii	Long head; superior margin of glenoid fossa short head	Radial tuberosity	Flexes arm, flexes forearm
External obliques	Ribs	Linea alba, iliac crest, pubis	Compresses abdominal wall, laterally rotates trunk
Internal Obliques	Ribs	Linea alba	Compresses abdominal wall, laterally rotates trunk
Tapezius	Posterior occipital bone	Clavicle Acromion process  and spine of scapula	Extends and abducts head, rotates and adducts scapula, fixes scapula
Rhomboid minor	Ligamentum nuchae, Spines	Vertebral border of scapula at scapular spine	Adducts scapula (draws scapulae together)
Frontalis	Galea aponeurotica	skin superior to orbit	Raises eyebrows, draws scalp anteriorly
Subscapularis	Subscapular fossa	Lesser tubercle of humerus	Medially rotates arm, stabilizes shoulder joint
Teres Major	Inferior angle of scapula	Crest of lesser tubercle of humerus	Extends, adducts, and medially rotates arm
Triceps Brachii	Infraglenoid tuberosity of scapula, lateral and posterior surface of humerus	Olecranon process, tuberosity of ulna	Extends and adducts arm, extends forearm
Infraspinatus	Infraspinous Fossa	Greater tubercle of humerus	Laterally rotates arm, stabilizes shoulder joint