Practical 2 Origins, Insertions, Action

Question 1

Digastric

Answer 1

O: Mastoid process (temporal bone) and jugular process (occipital)
I: Mandible
A: Depress mandible/ open mouth

Question 2

Sternomastoid

Answer 2

O: manubrium of sternum
I: Lambiodal ridge and mastoid process
A: rotate

Question 3

Masseter

Answer 3

O: zygomatic arch
I: Masseteric fossa of mandible
A: Elevate mandible

Question 4

Temporalis

Answer 4

O: Temporal bone
I: Coronoid process of mandible
A: Elevate mandible

Question 5

Pectoantebrachialis

Answer 5

O: Manubrium
I: Fascial of forelimbs
A: adduct the forelimb

Question 6

Pectoralis major

Answer 6

O: cranial sternebrae
I: Proximal humerus
A: adduct the forelimb

Question 7

Pectoralis minor

Answer 7

O: Caudal sternebrae
I: Proximal humerus
A: adduct the forelimb

Question 8

Xiphihumeralis

Answer 8

O: xiphoid process
I: proximal humerus
A: adduct the forelimb

Question 9

external oblique

Answer 9

O: lumbodorsal fascia and ribs
I: Linea alba
A: compress abdominal viscera

Question 10

Internal oblique

Answer 10

O: lumbodorsal fascia and pelvis
I: linea alba
A: compress abdominal viscera

Question 11

Rectus abdominis

Answer 11

O: pubic symphisis
I: sternum and costal cartilages
A: flex trunk and compress abdominal viscera

Question 12

transversus abdominis

Answer 12

O: ilium, lumbar, vertebrae, and posterior ribs
I: linea alba
A: compress abdominal viscera

Question 13

Acromiodeltoid

Answer 13

O: acromion of scapula
I: deltoid tuberosity oh humerus
A: flex humerus

Question 14

Acromiotrapezius

Answer 14

O: spines of vertebrae
I: acromion process and spine of scapula
A: adduct and elevate scapula

Question 15

Clavodeltoid (clavobrachialis)

Answer 15

O: clavicle
I: proximal ulna
A: abduct and rotate humerus

Question 16

Clavotrapezius

Answer 16

O: nuchal line of skull and nuchal ligament
I: clavicle
A: moves humerus cranially

Question 17

Latissimus dorsi

Answer 17

O: lumbodorsal fascia and spines of lower thoracic and lumbar vertebrae
I: medial humerus
A: elevated and move humerus caudally

Question 18

Spinodeltoid

Answer 18

O: spine of scapula
I: deltoid tuberosity of humerus
A: elevate and rotate humerus

Question 19

Spinotrapezius

Answer 19

O: spine of thoracic vertebrae
I: scapula
A: elevate and move scapula caudally

Question 20

Teres major

Answer 20

O: axillary (caudally) border of scapula
I: medial humerus
A: adduct humerus

Question 21

Infraspinatus

Answer 21

O: infraspinous fossa
I: greater tuberosity of humerus
A: rotate humerus

Question 22

Longissimus dorsi

Answer 22

A: extend vertebrae column

Question 23

Subscapularis

Answer 23

O: subscapular fossa
I: lesser tuberosity of humerus
A: adduct humerus

Question 24

Supraspinatus

Answer 24

O: supraspinous fossa
I: greater tuberosity of humerus
A: extend humerus

Question 25

Biceps brachii

Answer 25

O: supraglenoid tubercle I: radial/bicipital tuberosity A: flex forearm

Question 26

Brachialis

Answer 26

O: lateral humerus I: proximal ulna (coronoid process) A: flex arm

Question 27

Triceps brachii

Answer 27

O: humerus I: olecranon of ulna Has 3 heads

Question 28

Lateral head of triceps brachii

Answer 28

O: deltoid ridge of humerus I: olecranon of ulna A: extend forearm

Question 29

Long head of triceps brachii

Answer 29

O: axillary border of scapula I: olecranon of ulna A: extend forearm

Question 30

Medial head of triceps brachii

Answer 30

O: humerus I: olecranon of ulna A: extend forearm

Question 31

Brachioradialis

Answer 31

O: midhumeris I: styloid process of radius A: supinate the manus

Question 32

Extensor carpi radialis longus

Answer 32

O: distal humerus I: second metacarpal A: extend the manus

Question 33

Extensor carpi ulnaris

Answer 33

O: lateral epicondyle of humerus I: fifth metacarpal A: extend the manus

Question 34

Supinator

Answer 34

O: lateral epicondyle of humerus I: radius (proximal end) A: supinate the manus

Question 35

Flexor carpi ulnaris

Answer 35

O: medial epicondyle of humerus I: pisiform bone A: flex the manus

Question 36

Palmaris longus (flexor digitorum superficialis)

Answer 36

O: medial epicondyle of humerus I: digits 2-5 A: flex the manus

Question 37

Pronator teres

Answer 37

O: medial epicondyle of humerus I: medial border of radius A: pronate the manus

Question 38

Caudofemoralis

Answer 38

O: proximal caudal vertebrae I: patella A: abduct thigh

Question 39

Gluteus Maximus

Answer 39

O: last sacral and fist caudal vertebra I: fascia latae A: abduct thigh

Question 40

Gluteus medius

Answer 40

O: Ilic crest, sacral vertebra, and first caudal vertebra I: greater trochanter of femur A: abduct thigh

Question 41

Gracilis

Answer 41

O: pubic symphysis I: fascia of distal thigh A: abduct thigh

Question 42

Tensor fascia latae

Answer 42

O: ilium I: fascia latae A: extend fascia latae

Question 43

Rectus femoris

Answer 43

O: ilium I: patella A: extend leg

Question 44

Sartorius

Answer 44

O: iliac crest I: patella and proximal tibia A: adduct and laterally rotate thigh, extend the leg

Question 45

Vastus intermedius

Answer 45

O: femur I: patella A: extend the leg

Question 46

Vastus lateralis

Answer 46

O: shaft of femur I: patella A: extend the leg

Question 47

Vastus medialis

Answer 47

O: greater trochanter of femur I: patella A: extend the leg

Question 48

Biceps femoris

Answer 48

O: Ischial tuberosity I: proximal tibia A: flex shank, adduct thigh

Question 49

Semimembranosus

Answer 49

O: ischium I: medial epicondyle of femur, proximal tibia A: extend thigh

Question 50

Semitendinosus

Answer 50

O: ischium I: tibia A: flex leg

Question 51

Tibialis anterior

Answer 51

O: proximal tibia and fibula I: first metatarsal A: dorsiflex the foot

Question 52

Gastrocnemius

Answer 52

O: distal, posterior femur, tendon of plantaris I: calcaneus A: extend the foot