Anatomy O-I-A

Front 1

A: Trapezius

Back 1

moves scapula and neck

Front 2

O: Trapezius

Back 2

external occipital protuberance and spinous processes of C7-T12

Front 3

I: Trapezius

Back 3

clavicle, acromion process and spine of scapula

Front 4

A: Zygomaticus major and minor

Back 4

smiling

Front 5

O: Zygomaticus major and minor

Back 5

zygomatic bone

Front 6

I: Zygomaticus major and minor

Back 6

tissue at the superior corner of lips

Front 7

A: Sternocloidomastoid

Back 7

If only one side contracts, it can cause rotation or flexion to the opposite side. If both sides contract together, it can cause neck flexion.

Front 8

O: Sternocloidomastoid

Back 8

manubrium and clavicle

Front 9

I: Sternocloidomastoid

Back 9

mastoid process

Front 10

A: Latissimus dorsi

Back 10

moves the humerus

Front 11

O: Latissimus dorsi

Back 11

on bones at the midline of the back and the hips. origins include the spinous process of some thoracic and all the lumbar vertebrae, the scaral crest of the scarum and iliac crest of the ilium.

Front 12

I: Latissimus dorsi

Back 12

intertubercular sulcus of the humerus (along with the pectoralis major and teres major, though all in slightly different positions)

Front 13

A: Rectus abdominis

Back 13

trunk flexion

Front 14

O: Rectus abdominis

Back 14

pubis of the os coxa

Front 15

I: Rectus abdominis

Back 15

costal cartilage of ribs 5-7 and xiphoid process

Front 16

A: Internal intercostals and external intercostals

Back 16

assist diaphragm in breathing

Front 17

O & I: Internal intercostals and external intercostals

Back 17

each intercostals originates on a rib then inserts on the rib below the originating rib.

Front 18

A: Deltoid

Back 18

moves the arm in many directions

Front 19

O: Deltoid

Back 19

spine of scapula and lateral clavicle

Front 20

I: Deltoid

Back 20

deltoid tuberosity of humerus

Front 21

A: Biceps brachii

Back 21

elbow flexion

Front 22

O: Biceps brachii

Back 22

both heads originate on the scapula, specifically on the coracoid process and just superior to the glenoid cavity

Front 23

I: Biceps brachii

Back 23

radial tuberosity

Front 24

A: Triceps brachii

Back 24

elbow extension

Front 25

O: Triceps brachii

Back 25

2 are on the proximal, posterior humerus and 1 is just inferior to the glenoid cavity on the scapula

Front 26

I: Triceps brachii

Back 26

olecranon process of ulna

Front 27

A: Gluteus maximus

Back 27

extends abducts the thigh

Front 28

O: Gluteus maximus

Back 28

posterior ilium, sacrum and coccyx

Front 29

I: Gluteus maximus

Back 29

gluteal tuberosity of femur

Front 30

A: Semimembranosus &Semitendinosus

Back 30

serve as the major knee flexors

Front 31

O: Semimembranosus & Semitendinosus

Back 31

ischial tuberosity

Front 32

I: Semimembranosus & Semitendinosus

Back 32

proximal tibia

Front 33

A: Biceps femoris

Back 33

major knee flexors

Front 34

O: Biceps femoris

Back 34

ischial tuberosity of os coxal and linea aspera of femur

Front 35

I: Biceps femoris

Back 35

The biceps femoris has two heads, one originating on the femur and one on the os coxa. The biceps femoris is the most lateral of the hamstrings.

Front 36

A: Rectus femoris

Back 36

knee extension

Front 37

O: Rectus femoris

Back 37

illium of os coxal bone

Front 38

I: Rectus femoris

Back 38

tibial tuberosity

Front 39

A: Vastus lateralis & Vastus intermedius&Vastus medialis

Back 39

knee extension

Front 40

O: Vastus lateralis & Vastus intermedius & Vastus medialis

Back 40

proximal, anterior femur (including greater trochanter)

Front 41

I: Vastus lateralis & Vastus intermedius & Vastus medialis

Back 41

tibial tuberosity (via patella and patellar tendon)

Front 42

A: Gastrocnemius

Back 42

ankle flexion

Front 43

O: Gastrocnemius

Back 43

medial and lateral condyles of the femur

Front 44

I: Gastrocnemius

Back 44

calcaneus via Achilles tendon

Front 45

A: Tibialis anterior

Back 45

ankle extension

Front 46

A: Soleus

Back 46

ankle flexion