1. The Muscular System Major Movers and Shakers
BIOL 2400 – Anatomy and Physiology 1
Chapter 11

2. Temporalis O: Temporal bone I: Coronoid process and
O: Temporal bone
I: Coronoid process and
ramus of the mandible
A: Elevation of the
mandible
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3. Orbicularis oculi O: Medial wall of the orbit
I: Medial wall of the orbit
A: Closes the eyelid
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4. Orbicularis oris I: The skin at the corners of the mouth
 O: Opening of the mouth   
I: The skin at the corners
of the mouth
A: Closes the mouth
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5. Masseter anterior portion of the zygomatic arch I: Angle and the ramus
 O: Maxilla and the
anterior portion of the
zygomatic arch   
I: Angle and the ramus
of the mandible.
A: Elevation of the
mandible
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6. Zygomaticus major O: Zygomatic bone I: The skin at the corners  
I: The skin at the corners
of the mouth and the
orbicularis oris
A: Elevates the skin at
the corners of the
mouth (smiling)
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7. Depressor anguli
oris
O: Anterior 1/3 of the body of the mandible, lateral to the mental foramen   
I: Angle of the mouth
A: Draws the angle of
the mouth laterally
and inferiorly, as in
opening the mouth
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8. Supraspinatus O: The supraspinous fossa of the scapula
I: The greater tubercle of the humerus
A: Weak ABduction of the
shoulder joint
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9. Infraspinatus O: The infraspinous fossa of the scapula
I: The greater tubercle of the humerus
A: Lateral rotation of the
humerus
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10. Teres minor O: Inferior lateral border of the scapula
I: The greater tubercle of the humerus
A: Lateral rotation of the
humerus
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11. Pectoralis minor O: Ribs 3 through 5
I: The coracoid process of the scapula
A: Protraction of the
scapula
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12. Rhomboid major O: The spinous processes of T2 through T5
I: The vertebral border of the scapula, inferior to the spine
A: Retraction of the
scapula
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13. Rhomboid minor O: The spinous processes of C7 through T1
I: The vertebral border of the scapula, superior to the spine
A: Retraction of the
scapula
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14. Levator scapulae O: The transverse processes of C1 through C4
I: The superior angle of the scapula
A: Elevation of the
scapula
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15. Supinator O: The lateral epicondyle of the humerus
I: The lateral surface of the proximal third of the radius
A: Supination of the forearm
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16. Pronator
teres
O: The medial epicondyle of the humerus and the coronoid process of the ulna
I: The midlateral surface of the radius
A: Pronation of the forearm
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17. Triceps brachii O: Long head: the inferior margin of the Glenoid fossa
Lateral head: the lateral, posterior surface of the humerus
Medial head: the posterior surface of the humerus
I: The olecranon of the ulna
A: Extension of the elbow joint
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18. Brachialis O: The distal, anterior surface of the humerus
I: The coronoid process of the ulna
A: Flexion of the elbow
joint
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19. Biceps brachii O: Long head: superior margin of the Glenoid fossa
Short head: the coracoid process of the scapula
I: The radial tuberosity of the radius
A: Flexion of the elbow joint
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20. External obliques O: The last eight (8) ribs I: The iliac crest and
I: The iliac crest and
the linea alba
A: Both: flexion of the
vertebral column
Single: lateral flexion
of the vertebral column
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21. Latissimus
dorsi
O: Spinous processes of T6 through L5, the iliac crest, the sacrum and ribs 9 through 12
I:The intertubercular groove of the humerus
A: ADduction of the
humerus
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22. Pectoralis
major
O:The clavicle, the sternum and the costal cartilage of ribs 2 through 6
I: The greater tubercle of the humerus
A: ADduction of
the humerus
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23. Trapezius
O: The occipital bone and the spinous processes of C7 through T12
I: The clavicle, the acromion and the spine of the scapula
A: Stabilizes the scapula
Superior fibers:
elevation of the scapula
Intermediate fibers:
retraction of the scapula
Inferior fibers:
depression of the scapula
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24. Iliopsoas- Iliacus O: The iliac fossa and the sacrum
I: The lesser trochanter of the femur
A: Flexion of the hip joint
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25. Iliopsoas- Psoas major
O: The transverse processes and bodies of L1 through L5
I: The lesser trochanter of the femur
A: Flexion of the hip
joint
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26. Adductor longus O: The pubic crest and the symphysis pubis
I: The linea aspera of the femur
A: ADduction of the hip
joint
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27. Fibularis (Peroneus) longus
O: The lateral condyle of the tibia and the head and shaft of the fibula
I: The first metatarsal and the medial cuneiform
A: Plantar flexion of the
ankle joint
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28. Soleus O: The head of the fibula and the medial shaft of the tibia
I: The calcaneus by way of the Achilles tendon
A: Plantar flexion of the
ankle joint
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29. Gastrocnemius O: The medial and lateral condyles of the femur
I: The calcaneus by way of the Achilles tendon
A: Plantar flexion of the
ankle joint
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30. Tibialis anterior O: The lateral condyle and the shaft of the tibia
I: The first metatarsal and the medial cuneiform
A: Dorsiflexion of the ankle
joint
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31. Quadriceps femoris Made of four muscles: Rectus femoris
Vastus lateralis
Vastus medialis
Vastus intermedius

32. Quadriceps femoris Click for Answer Click for Answer Rectus Femoris
O: The anterior inferior iliac spine (AIIS)
I: The tibial tuberosity via the patellar ligament
A: Extension of the knee joint
Vastus Lateralis
O: The greater trochanter and the linea aspera of the femur
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33. Quadriceps femoris Click for Answer Click for Answer Vastus Medialis
O: The linea aspera of the femur
I: The tibial tuberosity via the patellar ligament
A: Extension of the knee joint
Vastus Intermedius
O: The anterior and lateral surfaces of the shaft of the femur
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34. Sartorius O: The anterior superior iliac spine (ASIS)
I: The medial surface of the proximal shaft of the tibia
A: ABduction of the hip
joint
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35. Gluteus medius O: The ilium I: The greater trochanter of the femur
I: The greater trochanter of the femur
A: ABduction of the hip
joint
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36. Biceps femoris O: Long head: the ischial tuberosity
Short head: the linea aspera of the femur
I: The lateral condyle of the tibia and the head of the fibula
A: Flexion of the knee joint
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37. Gluteus maximus O: The iliac crest, the sacrum and the coccyx
I: The gluteal tuberosity of the femur
A: Extension of the hip joint
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38. Anterior
deltoid
O: The clavicle, the acromion and the spine of the scapula
I: The deltoid tuberosity
A: ABduction of the shoulder
joint
Anterior head: flexion of
the shoulder joint
Lateral head: Abduction
of the shoulder joint
Posterior head: extension
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39. Posterior
deltoid
O: The clavicle, the acromion and the spine of the scapula
I: The deltoid tuberosity
A: ABduction of the shoulder
joint
Anterior head: flexion of the
shoulder joint
Lateral head: ABduction of
the shoulder joint
Posterior head: extension
of the shoulder joint
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40. Rectus abdominis O: The pubic crest and the symphysis pubis
I: Costal cartilage of
ribs 5, 6 and 7
A: Flexion of the
vertebral column
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41. Sternocleidomastoid

42. Sternocleidomastoid O: The sternum and the clavicle
I: The mastoid process
of the temporal bone
A: Both: flexion of the
cervical vertebrae
Single: rotation of the
head to the opposite side
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43. Platysma and pectoralis major muscles I: Mandible, muscles around
 O: Fascia over the deltoid
and pectoralis major muscles   
I: Mandible, muscles around
the angle of the mouth, and
the skin of the lower face
A: Depression of the
mandible
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