MUSCLE frontalis
MUSCLES OF FACIAL EXPRESSION ORIGIN INSERTION galea aponeurotica skin of eybrows and nose
orbicularis oculi
frontal and maxillary bone
skin of eyelid
orbicularis oris
fibers of other mouth muscles
muscles and skin at angle of the mouth
platysma
pectoralis and deltoid fascia
lower border of the mandible, mouth skin and muscle
MUSCLE masseter temporalis
MUSCLE Sternocleidomastoid
MUSCLES OF MASTICATION ORIGIN INSERTION zygomatic arch mandible temporal fossa of the temporal bone
ACTION raises eyebrows, wrinkles forehead skin blinking, squinting, forceful closing of eyelids closes and protrudes lips depresses mandible, draws angle of mouth downward, tightens skin of the neck
ACTION elevates mandible
coronoid process of the elevates and retracts mandible mandible
MUSCLES OF THE NECK ORIGIN INSERTION manubrium of sternum mastoid process of the and medial clavicle temporal bone
ACTION both muscles acting together flex cervical vertebral column, acting alone rotates head to the opposite side
internal intercostals
MUSCLES OF THE THORACIC WALL ORIGIN INSERTION ACTION ribs 3-5 coracoid process of the depresses and pulls scapula scapula anteriorly inferior border of ribs superior border of ribs elevate and expand rib cage superior border of ribs inferior border of ribs depress rib cage
serratus anterior
ribs
MUSCLE pectoralis minor external intercostals
vertebral border of the scapula
draws scapula forward along thoracic wall, rotates scapula
MUSCLES OF THE ABDOMINAL WALL MUSCLE external abdominal oblique
ORIGIN lower eight ribs
INSERTION ACTION linea alba, aponeurosis compresses abdominal of the external contents, assists in abdominal oblique flexion and rotation of vertebral column
internal abdominal oblique
lumbodorsal fascia, iliac crest
linea alba, aponeurosis same as external of internal abdominal abdominal oblique oblique
rectus abdominis
pubic crest and pubic symphysis
ribs and xiphoid process
flexes vertebral column, compresses abdominal contents
MUSCLES OF THE PECTORAL GIRDLE MUSCLE trapezius
ORIGIN INSERTION occipital bone, cervical lateral 1/3 of clavicle and thoracic vertebrae and scapular spine and acromion
ACTION elevates, depresses, rotates, adducts scapula
deltoid
clavicle, acromion and spine of scapula
deltoid tuberosity of the humerus
abducts; flexes and medially rotates; extends and laterally rotates arm
latissimus dorsi
lumbodorsal fascia via thoracic and lumbar vertebrae, sacrum, ilium
intertubercular groove of the humerus
extends, adducts, and medially rotates arm
pectoralis major
sternum, clavicle, and ribs
greater tubercle and along intertubercular groove of the humerus
flexes, medially rotates, and adducts arm
MUSCLES ASSOCIATED WITH THE SCAPULA MUSCLE levator scapula
ORIGIN INSERTION transverse processes of superior angle and cervical vertebrae vertebral border of the scapula spinous processes of vertebral border of the thoracic vertebrae scapula
ACTION elevates scapula
supraspinatus
supraspinous fossa of the scapula
greater tubercle of the humerus
arm abduction
infraspinatus
infraspinous fossa of the scapula
greater tubercle of the humerus
laterally rotates arm
teres major
inferior angle of scapula
lesser tubercle of the humerus
adducts, extends and medially rotates arm
teres minor
lateral border of scapula
greater tubercle of the humerus
laterally rotates arm
subscapularis
subscapular fossa of the scapula
lesser tubercle of the humerus
medially rotates arm
rhomboid major and minor
adducts, rotates scapula
MUSCLES OF THE ANTERIOR COMPARTMENT OF THE ARM MUSCLE biceps brachii long head short head
ORIGIN supraglenoid tubercle of the scapula
INSERTION radial tuberosity of the radius
ACTION flexes arm and forearm, supinates forearm
coracoid process of the scapula
brachialis
anterior humerus
coronoid process of the flexes forearm ulna
coracobrachialis
coracoid process of the medial humerus scapula
flexes arm
MUSCLES OF THE POSTERIOR COMPARTMENT OF THE ARM MUSCLE triceps brachii long head lateral head medial head
ORIGIN
INSERTION
infraglenoid tubercle of olecranon process of the scapula the ulna posterior humerus olecranon process of the ulna posterior humerus olecranon process of the ulna
ACTION extends arm and forearm forearm extension forearm extension
MUSCLES OF THE ANTERIOR COMPARTMENT OF THE FOREARM MUSCLE pronator teres flexor carpi radialis palmaris longus flexor carpi ulnaris flexor digitorum superficialis flexor digitorum profundus flexor pollicis longus pronator quadratus
ORIGIN medial epicondyle of the humerus medial epicondyle of the humerus medial epicondyle of the humerus
INSERTION radius
ACTION pronates forearm
metacarpals
flexes and abducts hand flexes hand
medial epicondyle of the humerus medial epicondyle of the humerus
carpal and metacarpals flexes and adducts hand middle phalanges 2nd flexes phalanges to 5th digit
ulna and interosseus membrane anterior radius and interosseus membrane distal and anterior ulnar shaft
distal phalanges 2nd to 5th digit distal phalanx of the thumb distal and anterior radius
palmar aponeurosis
flexes phalanges flexes thumb pronates forearm, hold radius and ulna together
MUSCLES OF THE POSTERIOR COMPARTMENT OF THE FOREARM MUSCLE brachioradialis
ORIGIN lateral supracondylar ridge of the humerus
INSERTION styloid process of the radius
ACTION flexes forearm
extensor carpi radialis longus
lateral supracondylar ridge of the humerus
second metacarpal bone
extends and abducts hand
extensor carpi radialis brevis
lateral epicondyle of the humerus
third metacarpal
extends and abducts hand
extensor digitorum
lateral epicondyle of the humerus
extends fingers and hand
extensor carpi ulnaris
lateral epicondyle of the humerus
middle and distal phalanges of medial four fingers fifth metacarpal
supinator
lateral epicondyle of the humerus
proximal end of radius
supinates forearm
first metacarpal
abducts and extends thumb extends thumb
abductor pollicis posterior radius and longus posterior ulna extensor pollicis brevis radius and posterior ulna extensor pollicis ulna and posterior longus radius extensor indicis posterior ulna extensor digiti minimi anconeus
lateral epicondyle of the humerus lateral epicondyle of the humerus
proximal phalanx of the thumb distal phalanx of the thumb extensor expansion of index finger extensor expansion of the little finger olecranon process of ulna
extends and adducts hand
extends thumb extends index finger extends little finger abducts ulna during pronation; elbow extension
INTRINSIC MUSCLES OF THE HAND MUSCLE ORIGIN abductor pollicis brevis scaphoid, trapezium
INSERTION proximal phalanx of the thumb
ACTION abducts thumb
opponens pollicis
trapezium
thumb metacarpal
rotates first metacarpal medially, i.e., opposition of the thumb
flexor pollicis brevis
trapezium, 1st metacarpal
proximal phalanx of thumb
flexes and adducts thumb
adductor pollicis
capitate, 2nd and 3rd metacarpal
proximal phalanx of the thumb
adducts thumb
MUSCLES ASSOCIATED WITH THE ANTERIOR COMPARTMENT OF THE THIGH MUSCLE iliopsoas
ORIGIN iliac fossa, transverse processes of lumbar vertebrae
INSERTION ACTION lesser trochanter of the flexes hip femur
sartorius
anterior superior iliac spine
medial tibia
quadriceps femoris rectus femoris
all four: anterior inferior iliac spine
vastus lateralis
greater trochanter of the femur
vastus medialis
linea aspera
vastus intermedius
shaft of the femur
pectineus tensor fascia latae
flexes, laterally rotates thigh; flexes and medially rotates leg at the knee
superior ramus of pubis anterior superior iliac spine, iliac crest
via quadriceps tendon into patella, then ligamentum patellae onto tibial tuberosity of the tibia
rectus femoris only flexes thigh at hip all four - extends leg at knee
linea aspera of femur
flexes, adducts thigh
iliotibial tract
flexes and abducts thigh
MUSCLES ASSOCIATED WITH THE MEDIAL COMPARTMENT OF THE THIGH MUSCLE gracilis
ORIGIN inferior ramus and body of the pubis
INSERTION medial surface of tibia
ACTION adducts thigh at hip; flexes leg at knee
adductor longus
pubis
linea aspera of femur
adducts and flexes thigh at hip
adductor brevis
body and inferior lineas aspera of femur ramus of the pubis inferior ramus of pubis lineas aspera of femur and ischium, ischial tuberosity
adductor magnus
adducts thigh at hip adducts and flexes thigh at hip
MUSCLES ASSOCIATED WITH THE GLUTEAL REGION AND POSTERIOR COMPARTMENT OF THE THIGH MUSCLE gluteus maximus
ORIGIN posterior ilium, sacrum, and coccyx
INSERTION iliotibial tract, gluteal tuberosity of femur
ACTION extends and laterally rotates hip
gluteus medius
lateral ilium
greater trochanter of the femur head of fibula, lateral condyle of tibia
abducts thigh at hip
biceps femoris long head short head
ischial tuberosity linea aspera
semitendinosus
ischial tuberosity
semimembranosus
ischial tuberosity
gluteus minimis piriformis
external surface of ilium lateral surface of ilium
quadratus femoris
ischial tuberosity
flexes and laterally rotates leg at knee long head only extends thigh at hip medial tibia extends thigh at hip; flexes and medially rotates leg at knee medial condyle of tibia extends thigh at hip; flexes and medially rotates leg at knee greater trochanter of abducts and medially femur rotates thigh greater trochanter of rotates and extends femur thigh laterally, abducts thigh intertrochanteric crest rotates thigh laterally of femur
MUSCLES ASSOCIATED WITH THE ANTERIOR COMPARTMENT OF THE LEG MUSCLE tibialis anterior
ORIGIN lateral condyle of tibia
INSERTION cuneiform and base of 1st metatarsal
ACTION dorsiflexes and inverts the foot; extends toe
extensor hallucis longus extensor digitorum longus
anterior fibula, interosseous membrane lateral condyle of tibia, proximal fibula, interosseous membrane anterior fibula, interosseous membrane
distal phalanx of great toe phalanges of toes 2-5
dorsiflexes and inverts foot; extends big toe dorsiflexes foot and extends toes
fifth metatarsal
dorsiflexes and everts foot
fibularis (peroneus) tertius
MUSCLES ASSOCIATED WITH THE LATERAL COMPARTMENT OF THE LEG MUSCLE fibularis (peroneus) longus
ORIGIN head of fibula
INSERTION cuneiform, base of 1st metatarsal
ACTION plantar flexes and everts foot
fibularis (peroneus) brevis
distal fibula
fifth metatarsal
plantar flexes and everts foot
MUSCLES ASSOCIATED WITH THE POSTERIOR COMPARTMENT OF THE LEG MUSCLE gastrocnemius
ORIGIN lateral and medial condyle of the femur
INSERTION calcaneus
ACTION plantar flexes the foot, weak flexor of leg at knee plantar flexes the foot
soleus flexor digitorum longus
proximal tibia, calcaneus proximal fibula, interosseous membrane posterior tibia distal phalanges lateral plantar flexes and four toes inverts foot; flexes toes
flexor hallucis longus
middle shaft of fibula
distal phalanx great toe plantar flexes and inverts foot; flexes great toe
tibialis posterior
tibia and fibula
navicular bone
plantar flexes and inverts foot
