Muscles - Origin & Insertion

Question 1

epicranius frontal belly

Answer 1

origin: epicranial aponeurosis
insertion: skin of eyebrows and root of nose

Question 2

epicranius occipital belly

Answer 2

origin: occipital and temporal bones
insertion: epicranial aponeurosis

Question 3

zygomaticus major & minor

Answer 3

origin: zygomatic bone
insertion: skin and muscle at corner of mouth

Question 4

masseter

Answer 4

origin: zygomatic arch and zygomatic bone
insertion: angle of ramus and mandible

Question 5

temporalis

Answer 5

origin: temporal fossa
insertion: coronoid process of mandible

Question 6

sternocleidomastoid

Answer 6

origin: manubrium of sternum and medial portion of clavicle
insertion: mastoid process of temporal bone and superior nuchal line of occipital bone

Question 7

deltoid

Answer 7

origin: lateral 1/3 of clavicle; acromion and spine of scapula
insertion: deltoid tuberosity of humerus

Question 8

pectoralis major

Answer 8

origin: clavicle, sternum, cartilage of ribs 1-6 (or 7), and aponeurosis of external oblique muscle
insertion: fibers converge to insert by short tendon into intertubercular sulcus of humerus

Question 9

pectoralis minor

Answer 9

origin: anterior surface of ribs 3-5, near their costal cartilages
insertion: coracoid process of scapula

Question 10

serratus anterior

Answer 10

origin: lateral aspect of ribs 1-8 (or 9)
insertion: vertebral border of anterior surface of scapula

Question 11

external intercostals

Answer 11

origin: inferior border of rib above
insertion: superior border of rib below

Question 12

internal intercostals

Answer 12

origin: superior border of rib below
insertion: inferior border of rib above

Question 13

rectus abdominis

Answer 13

origin: pubic crest and symphysis
insertion: xiphoid process and costal cartilages of ribs 5-7

Question 14

trapezius

Answer 14

origin: occipital bone; ligamentum nuchae; spines of C7 and all thoracic vertebrae
insertion: acromion and spinous process of scapula; lateral third of clavicle

Question 15

latissimus dorsi

Answer 15

origin: indirect attachment to spinous processes of lower six thoracic vertebrae, lumbar vertebrae, last three to four ribs, & iliac crest
insertion: floor of intertubercular sulcus of humerus

Question 16

teres major

Answer 16

origin: posterior surface at inferior angle of scapula
insertion: intertubercular sulcus of humerus

Question 17

teres minor

Answer 17

origin: lateral margin of posterior scapula
insertion: greater tubercle of humerus

Question 18

supraspinatus

Answer 18

origin: supraspinous fossa of scapula
insertion: greater tubercle of humerus

Question 19

infraspinatus

Answer 19

origin: infraspinous fossa of scapula
insertion: greater tubercle of humerus

Question 20

subscapularis

Answer 20

origin: subscapular fossa
insertion: lesser tubercle of humerus

Question 21

rhomboid minor & major

Answer 21

origin: spinous processes of C7 and T1-T5
insertion: medial border of scapula

Question 22

biceps brachii long head

Answer 22

origin: supraglenoid tubercle and lip of glenoid cavity; tendon of long head runs in intertubercular sulcus and within capsule of shoulder joint
insertion: radial tuberosity

Question 23

biceps brachii short head

Answer 23

origin: coracoid process
insertion: radial tuberosity

Question 24

brachialis

Answer 24

origin: distal portion of anterior humerus
insertion: coronoid process of ulna

Question 25

brachioradialis

Answer 25

origin: lateral ridge at distal end of humerus insertion: base of radial styloid process

Question 26

triceps brachii lateral head

Answer 26

origin: posterior humerus insertion: olecranon of ulna

Question 27

triceps brachii medial head

Answer 27

origin: distal radial groove on posterior humerus insertion: olecranon of ulna

Question 28

triceps brachii long head

Answer 28

origin: inferior margin of glenoid cavity insertion: olecranon of ulna

Question 29

iliopsoas - iliacus

Answer 29

origin: iliac fossa and crest, lateral sacrum insertion: on and just below lesser trochanter of femur

Question 30

iliopsoas - psoas major

Answer 30

origin: transverse processes, bodies, and discs of T12 and lumbar vertebrae insertion: on and just below lesser trochanter of femur

Question 31

sartorius

Answer 31

origin: anterior superior iliac spine insertion: by an aponeurosis into medial aspect of proximal tibia

Question 32

gracilis

Answer 32

origin: inferior ramus and body of pubis insertion: medial surface of tibia just inferior to medial condyle

Question 33

gluteus maximus

Answer 33

origin: dorsal ilium, sacrum, and coccyx insertion: gluteal tuberosity of femur and iliotibial tract

Question 34

tensor fasciae latae

Answer 34

origin: anterior aspect of iliac crest and anterior superior iliac spine insertion: iliotibial tract

Question 35

adductor magnus

Answer 35

origin: ischial and pubic rami and ischial tuberosity insertion: linea aspera and adductor tubercle of femur

Question 36

quadriceps group: rectus femoris

Answer 36

origin: anterior inferior iliac spine and superior margin of acetabulum insertion: tibial tuberosity and patella

Question 37

biceps femoris long head

Answer 37

origin: ischial tuberosity insertion: tendon passes laterally to insert into head of fibula and lateral condyle of tibia

Question 38

biceps femoris short head

Answer 38

origin: linea aspera and distal femur insertion: tendon passes laterally to insert into head of fibula and lateral condyle of tibia

Question 39

semitendinosus

Answer 39

origin: ischial tuberosity insertion: medial aspect of upper tibial shaft

Question 40

semimembranosus

Answer 40

origin: ischial tuberosity insertion: medial condyle of tibia; lateral condyle of femur

Question 41

gastrocnemius

Answer 41

origin: by two heads from medial and lateral condyles of femur insertion: calcaneus via calcaneal tendon

Question 42

soleus

Answer 42

origin: proximal portion of tibia and fibular; interosseous membrane insertion: calcaneus via calcaneal tendon

Question 43

tibialis anterior

Answer 43

origin: lateral condyle and upper 2/3 of tibia; interosseous membrane insertion: by tendon into inferior surface of first cuneiform and metatarsal I

Question 44

tibialis posterior

Answer 44

origin: superior portion of tibia and fibula and interosseous membrane insertion: tendon passes obliquely behind medial malleolus and under arch of foot; inserts into several tarsals and metatarsals II-IV