Bio 201 Muscle Origins And Insertions

Front 1

Frontalis

Back 1

Origin- Epicranial aponeurosis

Insertion- Skin and muscles around eye

Action- Raises eyebrows

Front 2

Occipitalis

Back 2

Origin- Occipital bone

Insertion- epicranial aponeurosis

Action- synerist to frontalis

Front 3

Temporalis

Back 3

Origin- temporal bone

Insertion- coronoid process of mandible

action- elevates mandible

Front 4

orbicularis oculi

Back 4

Origin- maxillary & frontal bone

Insertion- skin around eye

action-closes eye

Front 5

zygomaticus

Back 5

origin- zygomatic arch

insertion- orbicularis oris

action- raises the corner of mouth

Front 6

buccinator

Back 6

origin- mandible & maxillary

insertion- orbicularis oris

action- compress cheeks inward

Front 7

masseter

Back 7

origin- zygomatic arch

insertion- mandible

action- elevate mandible

Front 8

orbicularis oris

Back 8

origin- muscles near mouth

insertion- skin of central lips

action- closes lips

Front 9

platysma

Back 9

origin- fascia in upper chest

insertion- lower border of mandible

action- draws lip downward

Front 10

sternocleidomastoid

Back 10

origin- sternum & clavicle

insertion- mastoid process

action- pulls head to one side & flexes neck

Front 11

trapezius

Back 11

origin- occipital bone & spines of C & T vertebrae

insertion- clavicle, spine, and acromion process

action- rotates, raises & lowers scapula

Front 12

spenius capitus

Back 12

origin- spinous process

insertion- occipital bone

action- rotates head and extends neck

Front 13

levator scapulae

Back 13

origin- C1-C4 transverse process

insertion- medial margin of scapula

action- elavates scapula

Front 14

supraspinatus

Back 14

origin- supraspinatus fossa of scapula

insertion- greater tubercle of humerus

action- abducts arm

Front 15

rhomboideus minor

Back 15

origin- spines of C7

insertion- medial border of scapulae

action- retacts and elevates scapulae

Front 16

rhomboideus major

Back 16

origin- spines of superior thoracic vertebrae

insertion- medial border of scapulae

action- retracts scapulae

Front 17

pectoralis major

Back 17

origin- clavicle, sternum & costal cartilage of upper ribs

insertion- intertubercular groove of humerus

action- flexes, adducts, & rotates arm medially

Front 18

pectoralis minor

Back 18

origin- sternal end of upper ribs

insertion- coracoid process of scapula

action- pull scapula forward and downward & raise ribs

Front 19

serratus anterior

Back 19

origin - outer surface of upper ribs

insertion- ventral surface of scapula

action- protracts scapula

Front 20

external intercostals

Back 20

origin- inferior portion of ribs

insertion- superior rib beneath

action- elevates scapula

Front 21

latissimus dorsi

Back 21

origin- spines of sacral, lumbar and lower thoracic vertebraem iliac crest and lower ribs

insertion- intertubercular groove of humerus

action- extends, adducts and medially rotates arm or pulls shoulder downward and back

Front 22

rectus abdominis

Back 22

origin- crest of pubis and symphysis pubis

insertion- xiphoid process of sternum & costal cartilage

action- tenses abdominal wall and compresses abdominal content/ flexes torso

Front 23

internal intercostalis

Back 23

origin- superior portion of rib

insertion- inferior rib above

action- depresses ribcage

Front 24

transversus abdominus

Back 24

origin- costal cartilage, lumbar vertebrae and ilium

insertion- linea alba

action- tenses abdomen

Front 25

diaphragm

Back 25

origin- ribs, sternum, and vertebra

insertion- central tendon of diaphragm

action- inhalation

Front 26

gluteus maximus

Back 26

origin- dorsal ilium, sacrum, and coccyx

insertion- posterior surface of femur and fascia of thigh

action- extends thigh at hip

Front 27

gluteus medius

Back 27

origin- lateral surface of ilium

insertion- greater trochanter of femur

action- abducts and rotates thigh med.

Front 28

tensor fascia latae

Back 28

origin- anterior iliac crest

insertion- fascia of thigh

action- abducts & rotates thigh

Front 29

sartorius

Back 29

origin- anterior superior iliac spine

insertion- medial tibia

action- crossing legs

Front 30

vastus medialis

Back 30

origin- medial surface of femur

insertion- tibial tuberosity

action- extends the leg at the knee

Front 31

vastus lateralis

Back 31

origin- greater trochanter & posterior surface of the femur

insertion- tibial tuberosity

action- extends the leg at the knee

Front 32

rectus femoris

Back 32

origin- spine of the ilium and margin of acetabulum

insertion- tibial tuberosity

action- extends the leg, flexes thigh

Front 33

vastus intermedius

Back 33

origin- anterior & lateral surface of femur

insertion- tibial tuberosity

action- extends the leg

Front 34

gracilis

Back 34

origin- symphysis pubis

insertion- medial tibia

action- adducts thigh

Front 35

adductor longus

Back 35

origin- pubic bone

insertion- posterior femur

action- adducts and rotates thigh

Front 36

adductor magnus

Back 36

origin- ischial tuberosity

insertion- posterior surface of femur

action- adducts, extends and rotates thigh laterally

Front 37

senitendinosus

Back 37

origin- ishial tuberosity

insertion- medial surface of tibia

action- flexes & rotates leg medially & extends thigh

Front 38

semimembranosus

Back 38

origin- ishial tuberosity

insertion- medial surface of tibia

action- flexes and rotates leg (medially)

Front 39

biceps femoris

Back 39

origin- ischial tuberosity and linea aspera

insertion- head of fibula/lateral condyle of tibia

action- flexes and rotates leg ( laterally)

Front 40

tibialis anterior

Back 40

origin- lateral condyle of tibia.fibula

insertion- cuniform and 1st metatarsal

action- dorsiflexion and inversion of foot

Front 41

extensor digitorium longus

Back 41

origin- lateral condyle of tibia/fibula

insertion- distal phalanx of toes

action- extends the toes

Front 42

gastrocnemius

Back 42

origin- medial and lateral condyle of femur

insertion- posterior surface of calcaneus

action- plantar flexion of foot and flexion of leg at knee

Front 43

popliteus

Back 43

origin- lateral condyle (femur) and head of fibula

insertion- posterior tibia

action- internal rotation of knee

Front 44

tibialis posterior

Back 44

origin- head of fibula, proximal tibia

insertion- tarsal & metatarsal bones

action- plantar flexion and inversion of foot

Front 45

soleus

Back 45

origin- head of fibula, proximal tibia

insertion- posterior surface of calcaneus

action- plantar flexion of foot

Front 46

flexor digitiorum longus

Back 46

origin- posterior surface of tibia

insertion- distal phalanges 2-5

action- plantar, flexion, inversion of foot, and flexes of 4 lateral toes

Front 47

flexor hallicus longus

Back 47

origin- posterior fibula

insertion- distal phalanx of big toe

action- flexes big toe

Front 48

deltoid

Back 48

origin- acromion process and scaplular spine and clavicle

insertion- deltoid tuberosity of humerus

action- abduct, extend and flexex arm

Front 49

biceps brachii

Back 49

origin- coracoid process & tubercle above glenoid cavity

insertion- radial tuberosity

action- flexes forearm, rotates hand laterally ( supinate)

Front 50

brachialis

Back 50

origin- anterior shaft of humerus

insertion- ulna (coronoid process)

action- flexes the forearm

Front 51

triceps brachii

Back 51

origin- tubercle below glenoid cavity, lateral and medial surface of humerus

insertion- ulna (olecrannon process)

action- extends forearm

Front 52

brachioradialis

Back 52

origin- distal humerus

insertion- styloid process of radius

action- flexes forearm

Front 53

extensor carpi radialis longus

Back 53

origin- distal end of humerus

insertion- base of 2nd metacarpals

action- extends wrist/ abducts hand

Front 54

extensor carpi radialis brevis

Back 54

origin- lateral epicondyle of humerus

insertion- base of 2nd & 3rd metacarpals

action- extends wrist/ abducts hand

Front 55

extensor digitorium

Back 55

origin- lateral epicondyle of humerus

insertion- posterior phalanges 2-5

action- extends the fingers

Front 56

extensor carpi ulnaris

Back 56

origin- lateral epicondyle of humerus

insertion- base of 5th metacarpal

action- extends and abducts hand at wrist

Front 57

palmaris longus

Back 57

origin- medial epicondyle of humerus

insertion- fascia of palm

action- flexes and adducts hand at the wrist

Front 58

flexor carpi ulnaris

Back 58

origin- medial epicondyle of humerus and olecranon process

insertion- carpal & metacarpal bones

action- flexes & adducts hand at the wrist

Front 59

flexor digitorium superficialis

Back 59

origin- medial epicondyle of humerus

insertion- tendons of fingers

action- flexes fingers

Front 60

flexor carpi radialis

Back 60

origin- medial epicondyle of humerus

insertion- base of 2nd & 3rd metacarpals

action- flexes wrist and abducts hand

Front 61

pronator teres

Back 61

origin- medial epicondyle of humerus

insertion- lateral radius

action- rotate arm medially

Front 62

supinator

Back 62

origin- lateral epicondyle of humerus

insertion- lateral radius

action- rotates arm laterally