A&p Muscles

Front 1

Frontalis

Back 1

origin- galea aponeurotica
insertion- skin of forehead
Action- wrinkles forehead

Front 2

Orbicularis oris

Back 2

Origin- Mandible and maxillary
Insertion- Lips
Action- Closes and presses lips against teeth "kissing"

Front 3

Temporalis

Back 3

origin- temporal bone
insertion- mandible
action- elevates mandible "chewing"

Front 4

Sternocleidomastiod

Back 4

Origin-sternum and clavicle
insertion- Temporal bone
Action- flexes head and tilts it

Front 5

Masseter

Back 5

Origin- zygomatic arch
Insertion- Mandible
Action- elevates mandible "chewing"

Front 6

Pectoralis Major

Back 6

Origin- clavicle, sternum, costal cartilages
Insertion- Humerus
Aciton- flexes, adducts and rotates humerus

Front 7

Deltiod

Back 7

origin- clavicle and scapula
insertion- humerus
action- abducts humerus at shoulder

Front 8

External intercostals

Back 8

origin- inferior border of upper rib
Insertion- superior border of lower rib
Action- for respiration

Front 9

Latissimus dorsi

Back 9

origin- lubodorsal fascia, spinous processes of lower thoracic and lumbar vertebreae, lower ribs,
Insertion- humerus
Action- extends, adducts, and rotates humerus

Front 10

Trapezius

Back 10

origin- occiptal bone, ligamentum nuchae, spinous processes of thoracic vertebrae.
Insertion- clavicle and scapula
Action- extends head, elevates/depresses and rotates scapula, elevates clavicle

Front 11

external abdominal oblique

Back 11

Origin- Lower ribs
insertion-linea alba
action- flexes vertebral column, or bends vert. column to one side.

Front 12

rectus abdominus

Back 12

origin- pubis
insertion- sternum, costal cartilage, and some ribs
Action- flexes vert. column, supports and compresses abdominal viscera.

Front 13

Biceps brachii

Back 13

2 Origins- short head: scapula (coracoid process), Long head: scapula (tubercle above glenoid cavity)
Insertion- Radius
Action- flexes elbow & shoulder, supinates forearm.

Front 14

Brachialis

Back 14

Origin- anterior humerus
Insertion- ulna
Action- Flexes elbow

Front 15

Brachioradialis

Back 15

Origin- humerus (lateral epicondyle)
Insertion- radius
Action- Flexes elbow

Front 16

Triceps brachii

Back 16

Origin- Lateral head: lateral humerus. Medial head: posterior humerus. Long head: scapula
Insertion: Ulna
Action: extends elbow

Front 17

Sartorius

Back 17

Origin- illium
Insertion- Midial tibia
Action- flexes both hip and knee and roteates thigh laterally

Front 18

Gracilis

Back 18

Origin- Pubis
Insertion- Medial tibia
Action- adducts femur, flexes knee.

Front 19

Adductor longus

Back 19

Origin- Pubis
Insertion- Femur (linea aspera)
Action- adducts and flexes thigh

Front 20

adductor magnus

Back 20

Origin- Pubis and ischium
Insertion- Femur
Action adducts and extends thigh.

Front 21

Quads: Rectus femoris

Back 21

Origin- illium
Insertion- patellar ligament inserts on tibia
Action- extends knee, flexes hip

Front 22

Quads: vastus lateralis

Back 22

Origin- femur
insertion- patellar ligament inserts on tibia
Action- extends knee

Front 23

Quads: vastus medialis

Back 23

Origin- Femur
Insertion- patellar ligament inserts on tibia
Action- extends knee

Front 24

Quads: vastus intermedius

Back 24

Origin- Femur
Insetion- patellar ligament inserts on tibia
Action- Extends Knee

Front 25

Tibialis anterior

Back 25

Origin- Tibia
Insertion- tarsal and metatarsal
Action- dorsiflexes and inverts foot.

Front 26

Gluteus maximus

Back 26

Origin- pelvis and lumbodorsal fascia
Insertion- iliotibial tract, femur
Action- extends and rotates femur laterally

Front 27

Gluteus medius

Back 27

Origin- ilium
Insertion- femur
Action- abducts and medially rotates thigh.

Front 28

Hamstrings: Biceps femoris

Back 28

Origin- Long head: ischium, Short head: femur.
Insertion- fibula and tibia
Action- extends thigh at hip.

Front 29

Hamstrings: semitendinosis

Back 29

Origin: ischium
Insertion: medial tibia
Action: Flexes knee

Front 30

Hamstrings: semimembranosis

Back 30

Origin: ischium
Insertion: tibia
Action: flexes knee

Front 31

Gastorcnemius

Back 31

Origin: femur
Insertion: achilles tendon to calcaneous
Action: plantar flexes and inverts foot, flexes knee

Front 32

Soleus

Back 32

Origin: Fibula and tibia
Insertion: achilles tendon to calcaneous
Action: plantar flexes and inverts foot,