Epicranius

• O: Occipital bone

• I: Skin and muscles around eye

• F: Raises eyebrow

Temporalis

• O: Temporal bone

• I: Coronoid process and lateral surface of mandible

• A: Closes (elevates) jaw

Masseter

• O: Lower border of zygomatic arch

• I: Lateral surface of mandible

• A: Closes (elevates) jaw

Sternocleidomastoid

• O: Anterior surface of sternum

• O: Upper surface of clavicle

• I: Mastoid process of temporal bone

• A: Pulls head to one side or to chest

Sternocleidomastoid

Trapezius

• O: Occipital bone• O: Spines of cervical

and thoracic vertebrae

• I: Clavicle• I: Spine and

acromion process of scapula

• A: Moves scapula

Serratus Anterior

• O: Outer surface of upper ribs

• I: Ventral surface of scapula

• A: Pulls scapula anteriorly and inferiorly

Pectoralis Major

• O:Clavicle, sternum, and costal cartilages of upper ribs

• I: Intertubercular groove of humerus

• A: Internal rotation, adduction, horizontal adduction of arm

Latissimus Dorsi

• O: Spines of sacral, lumbar, and lower thoracic vertebrae

• O: Iliac crest• O: Lower ribs• I: Intertubercular

groove of humerus• A: Pulls shoulder

down and back

Deltoid

• O: Acromion process• O: Spine of scapula• O: Clavicle• I: Deltoid tuberosity

of humerus

• A: Abducts arm• A: Extends or flexes

humerus

Deltoid

Supraspinatus

• O: Posterior surface of scapula

• I: Greater tubercle of humerus

• A: Abducts arm

Supraspinatus

Infraspinatus

• O: Posterior surface of scapula

• I: Greater tubercle of humerus

• F: Rotates arm laterally (external rotation)

Infraspinatus

Subscapularis

• O: Anterior surface of scapula

• I: Lesser tubercle of humerus

• A: Rotates arm medially (internal rotation)

Teres Minor

• O: Lateral border of scapula

• I: Greater tubercle of humerus

• A: Rotates arm laterally (external rotation)

Terres Minor

Rotator Cuff

Supraspinatus

Subscapularis

Terres Minor

Infraspinatus

S-Supraspinatus

I-Infraspinatus

T-Terres Minor

S-Subscapularis

Biceps Brachii

• O: Coracoid process of scapula

• O: Tubercle above glenoid cavity of scapula

• I: Radial tuberosity of radius

• A: Flexes elbow and shoulder; supinates forearm

Biceps Brachii

Triceps Brachii

• O: Tubercle below glenoid cavity of scapula

• O: Lateral and medial borders of humerus

• I: Olecranon process of ulna

• A: Extends elbow

Triceps Brachii

External Oblique

• O: Outer surfaces of lower ribs

• I: Outer lip of iliac crest and linea alba

• A: Tenses abdominal wall

Rectus Abdominus

• O: Crest of pubis and symphysis pubis

• I: Xiphoid process of sternum and costal cartilages

• A: Tenses abdominal wall; flexes trunk

Want a Six Pack?

Linea Alba

External Oblique

Transverse Abdominus

Internal ObliqueExternal Oblique

Rectus Abdominus

Gluteus Maximus

• O: Sacrum, coccyx, and posterior surface of ilium

• I: Posterior surface of femur and fascia of thigh

• A: Extends hip

Tensor Fascia Latae

• O: Anterior iliac crest

• I: Fascia of thigh

• A: Abducts, flexes, and rotates thigh laterally (internal rotation)

Gracilis

• O: Lower edge of symphysis pubis

• I: Medial surface of tibia

• A: Adducts thigh, flexes and rotates lower limb medially

Biceps Femoris

• O: Ischial tuberosity and posterior sufrace of femur

• I: Head of fibula nad lateral condyle of tibia

• A: Flexes leg, extends thigh

Semitendonosis

• O: Ischial tuberosity

• I: Medial surface of tibia

• A: Flexes leg; extends thigh

Semimembranosis

• O: Ischial tuberosity

• I: Medial condyle of tibia

• A: Flexes leg; extends thigh

Hamstring Group

Biceps Femoris

Semitendonosis

Semimembranosis

Sartorius• O: Anterior superior

iliac spine

• I: Medial surface of tibia

• A: Flexes leg and thigh, abducts thigh, rotates thigh laterally, and rotates leg medially

Rectus Femoris

• O: Spine of ilium and margin of acetabulum

• I: Patellar tendon to tibial tuberosity

• A: Extends leg at knee

Vastus Lateralis

• O: Greater trochanter and posterior surface of femur

• I: Patellar tendon to tibial tuberosity

• A: Extends leg at knee

Vastus Medialis

• O: Medial surface of femur

• I: Patellar tendon to tibial tuberosity

• A: Extends leg at knee

Vastus Intermedius

• O: Anterior and lateral surfaces of femur

• I: Patellar tendon to tibial tuberosity

• A: Extends leg at knee

Quadriceps Group

Rectus Femoris

Vastus Lateralis

Vastus Medialis

Vastus Intermedius

Soleus

• O: Head and shaft of fibula; posterior surface ot tibia

• I: Posterior surface of calcaneus

• A: Plantar flexion of foot

Gastrocnemius

• O: Lateral and medial condyles of femur

• I: Posterior surface of calcaneus

• A: Plantar flexion of foot

• A: Flexion of leg at knee

Triceps Surae

Gastrocnemius GastrocnemiusSoleus

Soleus