ch 11-12?

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1

Trapezius
1. origin
2. insertion
3. action (3)

1. Occipical bone (superior nuchal line), ligament nuchae, spinous processes of C7-T5
2. Clavicle, acromion process and spine of scapula
3. a. Superior fibers: elevate and superiorly rotate scapula
b. Middle fibers: retract scapula
c. Inferior fibers: depress scapula

2

Masseter
1. origin
2. insertion
3. action

1. Superior and inferior temporal lines
2. Coronoid process of mandible
3. Elevates and retracts mandible

3

Sternocleidomastoid
1. origin
2. insertion
3. action (2)

1. Manubrium and sterna end of clavicle
2. Mastoid process
3. a. Unilateral action: lateral flexion, rotation of head to opposite side
b. Bilateral action: flexes neck

4

Pectoralis Major
1. origin
2. insertion
3. action

1. Medial clavicle, costal cartilages of ribs 2-6, body of sternum
2. Lateral part of intertubercular groove of humerus
3. Prime mover of arm flexion, adducts and medially rotates arm

5

Pectoralis minor
1. origin
2. insertion
3. action

1. Ribs 3-5
2. Coracoids process of scapula
3. Protracts and depresses scapula

6

Latissimus Dorsi
1. origin
2. insertion
3. action

1. Spinous processes of T2-T12, ribs 8-12, iliac crest, thoracolumbar fascia
2. Intertubercular groove of humerus
3. Prime mover of arm extension, also adducts and medially rotates arm

7

Serratus Anterior
1. origin
2. insertion
3. action

1. Rib 1-8, anterior and superior margins
2. Medial border of scapula, anterior surface
3. Prime mover in scapula protraction, superiorly rotates scapula, stabilizes scapula

8

Teres Major
1. origin
2. insertion
3. action

1. Inferior lateral border and inferior angle of scapula
2. Lesser tubercle and intertubercular groove of humerous
3. Extends, adducts, and medially rotates arm

9

Rectus Abdominis
1. origin
2. insertion
3. action

1. Superior surface of pubis near symphysis
2. Xiphoid process of sternum, inferior surfaces of ribs 5-7
3. Flexes vertebral column, compresses abdominal wall

10

Deltoid
1. origin
2. insertion
3. action (3)

1. Acromial end of clavicle, acromion and spine of scapula
2. Deltoid tuberosity of humerus
3. a. Anterior fibers: flex and medially rotate arm
b. Middle fibers: prime mover of arm abduction
c. Posterior fibers: extend and laterally rotate arm

11

Supraspinatus
1. origin
2. insertion
3. action

1. Supraspinous fossa of scapula
2. Greater tubercle of humerus
3. Abducts arm

12

Infraspinatus
1. origin
2. insertion
3. action

1. Infraspinous fossa of scapula
2. Greater tubercle of humerus
3. Adducts and laterally rotates arm

13

Teres Minor
1. origin
2. insertion
3. action

1. Upper dorsal lateral border of scapula
2. Greater tubercle of humerus
3. Adducts and laterally rotates arm

14

Subscapularis
1. origin
2. insertion
3. action

1. Subscapular fossa of scapula
2. Lesser tubercle of humerus
3. Medially rotates arm

15

Triceps Brachii
1. origin (3)
2. insertion
3. action

1. a. Long head: infraglenoid tubercle of scapula
b. Lateral head: posterior humerus above radial groove
c. Medial head: posterior humerus below radial groove
2. Olecranon of ulna
3. Primary extensor of forearm long head of triceps also extends and adducts arm

16

Biceps Brachii
1. origin (2)
2. Insertion
3. action

1. a. Long head: supraglenoid tubercle of scapula
b. Short head: coracoids process of scapula
2. Radial tuberosity and bicipital aponeurosis
3. Flexes forearm, powerful supinator of forarm. Long head flexes arm

17

Rectus femoris
1. origin
2. insertion
3. action

1. Anterior inferior iliac spine
2. Quadriceps tendon to patellar ligament to tibial tuberosity
3. Flexes thigh, extends leg

18

Vastus lateralis
1. origin
2. insertion
3. action

1. Greater trochanter and linea aspera
2. Quadriceps tendon to patella and then patellar ligament to tibial tuberosity
3. Extends leg

19

Vastus Medialis
1. origin
2. insertion
3. action

1. Intertrochanteric line and aspera of femur
2. Quadriceps tendon to patella and then patellarligament to tibial tuberosity
3. Extends leg

20

Sartorius
1. origin
2. insertion
3. action

1. Anterior superior iliac spine
2. Tibial tuberosity, medial side
3. Flexes thigh and rotates thigh laterally, flexes leg and rotates leg medially

21

Gluteus Maximus
1. origin
2. insertion
3. action

1. Iliac crest, sacrum, coccyx
2. liotibial tract of fascia lata, linea aspera and gluteal tuberosity of femur
3. Extends thigh, laterally rotates thigh

22

Semimembranosus
1. origin
2. insertion
3. action

1. Ischial tuberosity
2. Posterior surface of medial condyle of tibia
3. Extends thigh and flexes leg, medially rotates leg

23

Semitendinosus
1. origin
2. insertion
3. action

1. Ischial tuberosity
2. Proximal medial surface of tibial
3. Extends thigh and flexes leg, medially rotates leg

24

Biceps Femoris
1. origin (2)
2. insertion
3. action

1. a. Long head: iscial tuberosity
b. Short head: linea aspera of femur
2. Head of fibula
3. Extends thigh, flexds leg, laterally rotates leg

25

Gastrocnemius
1. origin
2. insertion
3. action

1. Superior posterior surfaces of lateral and medial condyles of femur
2. Calcaneus
3. Flexes leg, plantar flexes foot

26

Soleus
1. origin
2. insertion
3. action

1. Head and proximal shaft of fibula, medial border of tibiaHead and proximal shaft of fibula, medial border of tibia
2. Calcaneus
3. Plantar Flexes foot

27

Tibialis Anter
1. origin
2. insertion
3. action

1. Lateral condyle and proximal shaft of tibia, interosseous membrane
2. Metatarsal I and first cuniform
3. Dorsiflexes foot inverts