Human Anatomy Lab Exam 2

Front 1

Biceps Brachii- Origin

Back 1

short head; coracoid process; long head; supraglenoid cavity; lateral head- posterior humerus; medial head-distal radial groove on posterior humerus;

Front 2

Biceps Brachii- Insertion

Back 2

radial tuberosity

Front 3

Biceps Brachii- Action

Back 3

flexion of elbow and supination of forearm; weak arm flexor

Front 4

Pectoralis Major- Origin

Back 4

clavicle, sternum, cartilage of ribs 1-6, and aponeurosis of external oblique muscle;

Front 5

Pectoralis Major- Insertion

Back 5

fibers converge by short tendon into intertubercular sulcus of humerus

Front 6

Pectoralis Major- action

Back 6

prime mover of arm flexion ; adducts, medially rotates arms;

Front 7

Rectus abdominis- origin

Back 7

pubic crest and symphysis

Front 8

Rectus abdominis- insertion

Back 8

xiphoid process and costal cartilage of ribs 5-7

Front 9

Rectus abdominis- action

Back 9

flexes and rotates vertebral column

Front 10

trapezius- origin

Back 10

occipital bone; ligamentum nuchae; spines of C7 and all thoracic vertebrae

Front 11

trapezius- insertion

Back 11

acromion and spinous process of scapula; lateral third of clavicle

Front 12

trapezius- action

Back 12

stabilizes, raises, rotates, and retracts scapula

Front 13

levator scapulae- origin

Back 13

transverse processes of C1-C4

Front 14

levator scapulae- insertion

Back 14

medial border of scapula superior to spine

Front 15

levator scapulae- action

Back 15

elevates and adducts scapula

Front 16

origin

Back 16

the stationary, immovable or less movable attachment

Front 17

insertion

Back 17

the moveable attachment

Front 18

agonist/prime movers

Back 18

muscles that are primarily responsible for producing a particular movement

Front 19

antagonist

Back 19

muscles that oppose or reverse a movement

Front 20

synergist

Back 20

reduces undesirable or unnecessary movement to help the action of agonists

Front 21

fixator

Back 21

fixation muscles that immobilize the origin of a prime mover so that all tension is exerted at the insertion

Front 22

adductor longus- origin

Back 22

pubis near pubic symphasis;

Front 23

adductor longus- insertion

Back 23

linea aspera

Front 24

adductor longus- action

Back 24

adduct and medially rotate and flex thigh

Front 25

vastus lateralis- origin

Back 25

greater trochanter, intertrochanteric line, and linera aspera;

Front 26

vastus lateralis- insertion

Back 26

tibial tuberosity and patella

Front 27

vastus lateralis- action

Back 27

extends and stabilizes knee

Front 28

gluteus maximus- origin

Back 28

dorsal ilium, sacrum, and coccyx

Front 29

gluteus maximus- insertion

Back 29

gluteal tuberosity of femur and iliotibial tract

Front 30

gluteus maximus- action

Back 30

major extensor of thigh;

Front 31

biceps femoris-origin

Back 31

ischial tuberosity (long head) ; linea aspera and distal femur (short head);

Front 32

biceps femoris- insertion

Back 32

tendon passes laterally to insert into head of fibula and lateral condyle of tibia

Front 33

biceps femoris- action

Back 33

extends thigh and flexes knee

Front 34

gastrocnemius- origin

Back 34

by two heads from medial and lateral condyles of femur

Front 35

gastrocnemius- insertion

Back 35

calcaneus via calcaneal tendon

Front 36

gastrocnemius- action

Back 36

plantar flexes foot when knee is extejded; crosses knee joint; thus can flex knee (when foot is dorsiflexed)