Muscle Orgin and Insertion

Zygomaticus

O: zygomatic bone

I: skin and muscle at corner of mouth

Massester

O: zygomatic arch and zygomatic bone

I: angle and ramus of mandible

Temporalis

O: Temporal Fossa

I: Coronoid process of mandible

Sternocleidomastoid

O: manubrium of sternum and medial portion of clavicle

I: mastoid process of temporal bone and occipital bone

External intercostals

O: Inferior border of rib above

I: Superior border of rib below

Internal intercostals

O: superior border or rib below

I: inferior border of rib above

Pectoralis minor

O: anterior surface of ribs 3-5

I: coracoid process of scapula

Levator Scapulae

O: transverse processes (of C1-C4)

I: medial border of scapula (superior to spine)

Rhomboids

O: spinous processes (of C7-T5)

I: medial border of scapula

Pectoralis Major

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

I: intertubercular sulcus of humerus

Deltoid

O: lateral 1/3 of clavicle; acromion and spine of scapula

I: deltoid tuberosity of humerus

Latissimus dorsi

I: intertubercular sulcus of humerus

Teres Major

O: posterior surface at inferior angle of scapula

I: intertubercular sulcus of humerus

Subscapularis

O: subscapular fossa of scapula

I: lesser tubercle of humerus

Supraspinatus

O: supraspinous fossa of scapula

I: greater tubercle of humerus

Infraspinatus

O: infraspinous fossa of scapula

I: greater tubercle of humerus

Teres minor

O: lateral border of dorsal scapular surface

I: greater tubercle of humerus

Tricep Brachii

I: Olecranon of ulna

Bicep Brachii

I: Radial Tuberosity

Flexors of the forearm/wrist

O: most on medial epicondyle of humerus

Extensors of the forearm/wrist

O: most of the lateral epicondyle of humerus

Sartorius

O: ASIS

I: Medial tibia

Quadriceps femoris→ rectus femoris, vastus lateralis, vastus medialis, vastus intermedius

O: rectus femoris on ASIS; the rest on proximal femur

I: tibial tuberosity and patella

Gluteus Maximus

O: ilium, sacrum, and coccyx

I: gluteal tuberosity of femur

Gluteus Medius

O: Ilium

I: Greater trochanter of femur

Gluteus minimus

O: Ilium

I: Greater trochanter of femur

Hamstrings→ biceps femoris, semitendinosus, semimembranosus

O: Ischial tuberosity

Gastrocnemius

I: Calcaneus via calcaneal tendon

Soleus

I: Calcaneus via calcaneal tendon